Hi,

We are running a GE Frame 5 (MS 5001N) machine on natural gas to drive a generator. It's rated at 20MW output.

Few months after CI the machine experienced alternating L28FDA and L28FDB during startups. Shortly followed by loss of flame trip during shutdown after few startups and shutdowns. When the tripping occurs, it's been always accompanied by high vibration alarm. Then we tried to rectify by running the machine in FSNL for 20 min after deloading. The vibration seemed to have stopped while the loss of flame trip persisted. Then we changed the servo and recalibrated the current bias setting in the ioconfig. After the replacement there was no more loss of flame trip, however there was high vibration during shutdowns, for about few weeks. Today, there was this loss of flame trip and also high vibration(especially on BB3 and BB4, at the load gear and excitor ends) recurring. IN addition, we have alternating L28FDA and L28FDB on every startups until minimum speed picks up(95%TNH).

Please Help. Below is the View2 record of shutdown today.

## Unit Pointname Scale
-- ---- ------------ -----
1 12 L39VA LOGIC
2 12 BB1 mm/s
3 12 BB2 mm/s
4 12 BB3 mm/s
5 12 BB4 mm/s
6 12 TNH %
7 12 L4T LOGIC
8 12 L28FDA LOGIC
9 12 L28FDB LOGIC
10 12 FPRGOUT bar
11 12 FPG2 bar
12 12 FSROUT %
13 12 FSR %
14 12 FSG %
15 12 FSGR %
16 12 FD_INTENS_1 CNT15
17 12 FD_INTENS_2 CNT15
08-AUG 00:06:02.968 0 5.7 5.6 9.1 5.3 99.91 0 1 1 13.87 13.84 23.09 23.09 22.91 13.23 342 582
08-AUG 00:06:03.062 0 5.7 5.6 9.1 5.3 99.91 0 1 1 13.87 13.85 23.09 23.09 22.91 13.23 342 582
08-AUG 00:06:03.156 0 5.7 5.6 9.1 5.3 99.92 0 1 1 13.87 13.87 23.05 23.05 22.84 13.23 343 582
08-AUG 00:06:03.250 0 5.7 5.6 9.1 5.3 99.92 0 1 1 13.87 13.88 22.92 22.92 22.91 13.23 343 582
08-AUG 00:06:03.343 0 5.7 5.6 9.1 5.3 99.91 0 1 1 13.87 13.92 23.09 23.09 22.77 13.23 343 582
08-AUG 00:06:03.437 0 5.7 5.6 9.1 5.3 99.91 0 1 1 13.87 13.91 23.09 23.09 22.70 13.23 343 582
08-AUG 00:06:03.531 0 5.7 5.6 9.1 5.4 99.91 0 1 1 13.87 13.88 23.05 23.05 22.91 13.23 343 582
08-AUG 00:06:03.625 0 5.7 5.6 9.1 5.4 99.91 0 1 1 13.87 13.88 23.09 23.09 22.91 13.23 343 582
08-AUG 00:06:03.718 0 5.7 5.6 9.1 5.3 99.91 0 1 1 13.87 13.86 23.09 23.09 22.91 13.23 343 582
08-AUG 00:06:03.812 0 5.7 5.6 9.1 5.3 99.92 0 1 1 13.87 13.85 23.09 23.09 22.91 13.23 343 582
08-AUG 00:06:03.906 0 5.7 5.6 9.1 5.3 99.91 0 1 1 13.87 13.89 22.92 22.92 22.84 13.15 345 582
08-AUG 00:06:04.000 0 5.7 5.6 9.1 5.3 99.91 0 1 1 13.87 13.91 23.05 23.05 22.70 13.23 345 586
08-AUG 00:06:04.093 0 5.7 5.6 9.1 5.3 99.91 0 1 1 13.87 13.90 23.09 23.09 22.77 13.15 346 586
08-AUG 00:06:04.187 0 5.7 5.6 9.1 5.3 99.91 0 1 1 13.87 13.90 23.09 23.09 22.77 13.15 346 586
08-AUG 00:06:04.281 0 5.7 5.6 9.1 5.2 99.91 0 1 1 13.87 13.86 23.05 23.05 22.84 13.15 346 586
08-AUG 00:06:04.375 0 5.7 5.6 9.1 5.2 99.91 0 1 1 13.87 13.87 23.09 23.09 22.77 13.15 346 586
08-AUG 00:06:04.468 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.91 23.05 23.05 22.77 13.15 346 586
08-AUG 00:06:04.562 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.89 23.05 23.05 22.77 13.15 346 586
08-AUG 00:06:04.656 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.88 23.09 23.09 22.77 13.15 346 586
08-AUG 00:06:04.750 0 5.6 5.6 9.0 5.3 99.91 0 1 1 13.87 13.85 23.09 23.09 22.77 13.15 346 586
08-AUG 00:06:04.843 0 5.6 5.6 9.0 5.3 99.89 0 1 1 13.87 13.91 23.21 23.21 22.84 13.15 346 586
08-AUG 00:06:04.937 0 5.7 5.6 8.9 5.3 99.91 0 1 1 13.87 13.88 23.21 23.21 22.84 13.15 349 577
08-AUG 00:06:05.031 0 5.7 5.6 8.9 5.2 99.91 0 1 1 13.87 13.85 23.09 23.09 22.91 13.15 352 574
08-AUG 00:06:05.125 0 5.7 5.6 8.9 5.2 99.91 0 1 1 13.87 13.87 23.09 23.09 22.84 13.15 352 574
08-AUG 00:06:05.218 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.88 23.09 23.09 22.84 13.15 352 574
08-AUG 00:06:05.312 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.84 23.09 23.09 22.77 13.15 352 574
08-AUG 00:06:05.406 0 5.7 5.6 8.9 5.2 99.91 0 1 1 13.87 13.82 23.09 23.09 22.91 13.15 352 574
08-AUG 00:06:05.500 0 5.7 5.6 8.9 5.1 99.91 0 1 1 13.87 13.87 23.09 23.09 22.84 13.15 352 574
08-AUG 00:06:05.593 0 5.7 5.6 8.9 5.1 99.89 0 1 1 13.87 13.86 23.21 23.21 22.84 13.15 352 574
08-AUG 00:06:05.687 0 5.7 5.6 9.0 5.1 99.91 0 1 1 13.87 13.85 23.21 23.21 22.91 13.15 352 574
08-AUG 00:06:05.781 0 5.7 5.6 9.0 5.1 99.91 0 1 1 13.87 13.81 23.09 23.09 22.98 13.15 352 574
08-AUG 00:06:05.875 0 5.7 5.6 9.0 5.1 99.91 0 1 1 13.87 13.82 23.09 23.09 22.91 13.15 352 574
08-AUG 00:06:05.968 0 5.7 5.6 8.8 5.1 99.91 0 1 1 13.87 13.87 23.09 23.09 22.91 13.15 332 580
08-AUG 00:06:06.062 0 5.7 5.6 8.8 5.1 99.91 0 1 1 13.87 13.83 23.09 23.09 22.91 13.15 332 580
08-AUG 00:06:06.156 0 5.6 5.6 8.8 5.1 99.89 0 1 1 13.87 13.85 23.09 23.09 22.91 13.15 332 580
08-AUG 00:06:06.250 0 5.6 5.6 8.8 5.0 99.89 0 1 1 13.87 13.89 23.21 23.21 22.91 13.23 332 580
08-AUG 00:06:06.343 0 5.6 5.6 8.8 5.0 99.91 0 1 1 13.87 13.85 23.05 23.05 23.05 13.15 332 580
08-AUG 00:06:06.437 0 5.6 5.6 8.8 5.0 99.91 0 1 1 13.87 13.82 23.05 23.05 22.98 13.23 332 580
08-AUG 00:06:06.531 0 5.6 5.6 8.8 5.0 99.91 0 1 1 13.87 13.86 23.09 23.09 22.91 13.23 332 580
08-AUG 00:06:06.625 0 5.6 5.6 8.8 5.0 99.91 0 1 1 13.87 13.83 23.09 23.09 22.84 13.23 332 580
08-AUG 00:06:06.718 0 5.5 5.6 8.8 5.0 99.91 0 1 1 13.87 13.85 23.05 23.05 22.91 13.23 332 580
08-AUG 00:06:06.812 0 5.5 5.6 8.8 5.0 99.91 0 1 1 13.87 13.86 23.05 23.05 22.91 13.23 332 580
08-AUG 00:06:06.906 0 5.6 5.6 8.9 5.0 99.91 0 1 1 13.87 13.89 23.09 23.09 22.91 13.23 334 598
08-AUG 00:06:07.000 0 5.6 5.6 8.9 4.9 99.91 0 1 1 13.87 13.84 23.09 23.09 22.91 13.23 346 601
08-AUG 00:06:07.093 0 5.6 5.6 8.9 4.9 99.91 0 1 1 13.87 13.87 23.05 23.05 22.91 13.23 346 601
08-AUG 00:06:07.187 0 5.6 5.6 8.9 4.9 99.91 0 1 1 13.87 13.85 23.05 23.05 22.91 13.23 346 601
08-AUG 00:06:07.281 0 5.6 5.6 8.9 5.0 99.91 0 1 1 13.87 13.85 23.09 23.09 22.84 13.23 346 601
08-AUG 00:06:07.375 0 5.6 5.6 8.9 5.0 99.91 0 1 1 13.87 13.89 23.09 23.09 22.91 13.23 346 601
08-AUG 00:06:07.468 0 5.6 5.6 8.9 5.0 99.91 0 1 1 13.87 13.86 23.09 23.09 22.91 13.23 346 601
08-AUG 00:06:07.562 0 5.6 5.6 8.9 5.0 99.91 0 1 1 13.87 13.86 23.09 23.09 22.84 13.23 346 601
08-AUG 00:06:07.656 0 5.6 5.6 8.8 5.0 99.89 0 1 1 13.87 13.86 23.05 23.05 22.84 13.23 346 601
08-AUG 00:06:07.750 0 5.6 5.5 8.8 5.0 99.89 0 1 1 13.87 13.90 23.21 23.21 22.84 13.23 346 601
08-AUG 00:06:07.843 0 5.6 5.5 8.8 5.0 99.91 0 1 1 13.87 13.91 23.09 23.09 22.91 13.23 346 601
08-AUG 00:06:07.937 0 5.6 5.5 8.9 5.0 99.91 0 1 1 13.87 13.86 23.09 23.09 22.91 13.23 344 601
08-AUG 00:06:08.031 0 5.6 5.6 8.9 5.0 99.91 0 1 1 13.87 13.84 23.09 23.09 22.84 13.23 336 604
08-AUG 00:06:08.125 0 5.6 5.6 8.9 5.0 99.91 0 1 1 13.87 13.88 23.05 23.05 22.84 13.23 336 604
08-AUG 00:06:08.218 0 5.7 5.6 8.9 5.0 99.91 0 1 1 13.87 13.86 23.09 23.09 22.77 13.23 336 604
08-AUG 00:06:08.312 0 5.7 5.6 8.9 5.0 99.91 0 1 1 13.87 13.89 23.09 23.09 22.77 13.15 336 604
08-AUG 00:06:08.406 0 5.6 5.6 8.9 5.0 99.91 0 1 1 13.87 13.88 23.09 23.09 22.77 13.23 336 604
08-AUG 00:06:08.500 0 5.6 5.6 8.9 5.0 99.91 0 1 1 13.87 13.84 23.05 23.05 22.84 13.15 336 604
08-AUG 00:06:08.593 0 5.6 5.6 8.9 5.0 99.91 0 1 1 13.87 13.88 23.09 23.09 22.77 13.23 336 604
08-AUG 00:06:08.687 0 5.6 5.6 8.9 5.0 99.89 0 1 1 13.87 13.90 23.09 23.09 22.77 13.23 336 604
08-AUG 00:06:08.781 0 5.6 5.6 8.9 5.0 99.91 0 1 1 13.87 13.86 23.21 23.21 22.77 13.15 336 604
08-AUG 00:06:08.875 0 5.6 5.6 8.9 5.0 99.91 0 1 1 13.87 13.88 23.09 23.09 22.98 13.15 336 604
08-AUG 00:06:08.968 0 5.6 5.6 9.0 5.1 99.91 0 1 1 13.87 13.84 23.09 23.09 22.84 13.15 343 562
08-AUG 00:06:09.062 0 5.6 5.6 9.0 5.1 99.89 0 1 1 13.87 13.85 23.09 23.09 22.84 13.15 343 562
08-AUG 00:06:09.156 0 5.6 5.6 8.9 5.1 99.91 0 1 1 13.87 13.89 23.21 23.21 22.84 13.15 343 560
08-AUG 00:06:09.250 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.88 23.09 23.09 22.91 13.15 343 560
08-AUG 00:06:09.343 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.92 23.09 23.09 22.84 13.23 343 560
08-AUG 00:06:09.437 0 5.6 5.6 9.0 5.2 99.89 0 1 1 13.87 13.86 23.09 23.09 22.84 13.15 343 560
08-AUG 00:06:09.531 0 5.6 5.6 9.0 5.3 99.91 0 1 1 13.87 13.83 23.21 23.21 22.84 13.15 343 560
08-AUG 00:06:09.625 0 5.6 5.6 9.0 5.3 99.91 0 1 1 13.87 13.91 23.09 23.09 22.91 13.23 343 560
08-AUG 00:06:09.718 0 5.5 5.6 9.0 5.3 99.91 0 1 1 13.87 13.87 23.09 23.09 22.84 13.15 343 560
08-AUG 00:06:09.812 0 5.5 5.6 9.0 5.3 99.91 0 1 1 13.87 13.87 23.09 23.09 22.84 13.15 343 560
08-AUG 00:06:09.906 0 5.6 5.6 9.1 5.3 99.91 0 1 1 13.87 13.88 23.09 23.09 22.84 13.15 341 560
08-AUG 00:06:10.000 0 5.6 5.6 9.1 5.3 99.91 0 1 1 13.87 13.90 23.05 23.05 22.84 13.15 341 586
08-AUG 00:06:10.093 0 5.6 5.6 9.1 5.3 99.91 0 1 1 13.87 13.91 23.09 23.09 22.77 13.23 342 589
08-AUG 00:06:10.187 0 5.6 5.6 9.0 5.3 99.91 0 1 1 13.87 13.92 23.09 23.09 22.84 13.23 342 589
08-AUG 00:06:10.281 0 5.6 5.5 9.0 5.2 99.91 0 1 1 13.87 13.87 23.09 23.09 22.84 13.15 342 589
08-AUG 00:06:10.375 0 5.6 5.5 9.0 5.2 99.91 0 1 1 13.87 13.89 23.05 23.05 22.84 13.15 342 589
08-AUG 00:06:10.468 0 5.7 5.6 9.1 5.3 99.91 0 1 1 13.87 13.87 23.09 23.09 22.77 13.15 342 589
08-AUG 00:06:10.562 0 5.7 5.6 9.1 5.3 99.91 0 1 1 13.87 13.92 23.09 23.09 22.77 13.15 342 589
08-AUG 00:06:10.656 0 5.6 5.6 9.0 5.3 99.89 0 1 1 13.87 13.87 23.09 23.09 22.84 13.15 342 589
08-AUG 00:06:10.750 0 5.6 5.6 9.0 5.3 99.89 0 1 1 13.87 13.89 23.21 23.21 22.77 13.15 342 589
08-AUG 00:06:10.843 0 5.6 5.6 9.0 5.3 99.89 0 1 1 13.87 13.87 23.21 23.21 22.91 13.15 342 589
08-AUG 00:06:10.937 0 5.5 5.6 9.0 5.3 99.89 0 1 1 13.87 13.84 23.21 23.21 22.91 13.15 343 586
08-AUG 00:06:11.031 0 5.5 5.6 9.0 5.3 99.89 0 1 1 13.87 13.82 23.30 23.30 22.98 13.15 351 577
08-AUG 00:06:11.125 0 5.5 5.6 9.0 5.3 99.89 0 1 1 13.87 13.87 23.21 23.21 22.98 13.15 352 577
08-AUG 00:06:11.218 0 5.6 5.5 9.0 5.3 99.91 0 1 1 13.87 13.87 23.09 23.09 22.98 13.15 352 577
08-AUG 00:06:11.312 0 5.6 5.5 9.0 5.3 99.91 0 1 1 13.87 13.79 23.09 23.09 22.98 13.23 352 577
08-AUG 00:06:11.406 0 5.5 5.5 9.1 5.3 99.91 0 1 1 13.87 13.84 23.05 23.05 22.84 13.23 352 577
08-AUG 00:06:11.500 0 5.5 5.6 9.1 5.3 99.91 0 1 1 13.87 13.92 23.09 23.09 22.77 13.23 352 577
08-AUG 00:06:11.593 0 5.5 5.6 9.1 5.3 99.91 0 1 1 13.87 13.92 23.09 23.09 22.77 13.23 352 577
08-AUG 00:06:11.687 0 5.5 5.6 8.9 5.3 99.89 0 1 1 13.87 13.87 23.09 23.09 22.77 13.15 352 577
08-AUG 00:06:11.781 0 5.5 5.6 8.9 5.2 99.89 0 1 1 13.87 13.90 23.21 23.21 22.84 13.23 352 577
08-AUG 00:06:11.875 0 5.5 5.6 8.9 5.2 99.89 0 1 1 13.87 13.89 23.21 23.21 22.91 13.15 352 577
08-AUG 00:06:11.968 0 5.6 5.6 8.9 5.3 99.91 0 1 1 13.87 13.85 23.09 23.09 22.91 13.15 356 586
08-AUG 00:06:12.062 0 5.6 5.6 8.9 5.3 99.91 0 1 1 13.87 13.82 23.09 23.09 22.91 13.15 356 586
08-AUG 00:06:12.156 0 5.6 5.6 8.9 5.3 99.89 0 1 1 13.87 13.87 23.09 23.09 22.84 13.15 353 583
08-AUG 00:06:12.250 0 5.6 5.6 8.9 5.3 99.89 0 1 1 13.87 13.87 23.21 23.21 22.84 13.23 353 583
08-AUG 00:06:12.343 0 5.6 5.6 8.9 5.3 99.89 0 1 1 13.87 13.86 23.21 23.21 22.91 13.23 353 583
08-AUG 00:06:12.437 0 5.6 5.6 8.8 5.3 99.91 0 1 1 13.87 13.84 23.21 23.21 22.91 13.15 353 583
08-AUG 00:06:12.531 0 5.6 5.6 8.8 5.3 99.91 0 1 1 13.87 13.84 23.09 23.09 22.91 13.15 353 583
08-AUG 00:06:12.625 0 5.6 5.6 8.8 5.3 99.91 0 1 1 13.87 13.87 23.09 23.09 22.84 13.15 353 583
08-AUG 00:06:12.718 0 5.6 5.6 8.8 5.3 99.91 0 1 1 13.87 13.92 23.09 23.09 22.84 13.15 353 583
08-AUG 00:06:12.812 0 5.6 5.6 8.8 5.3 99.89 0 1 1 13.87 13.84 23.09 23.09 22.84 13.23 353 583
08-AUG 00:06:12.906 0 5.7 5.6 8.9 5.3 99.89 0 1 1 13.87 13.88 23.21 23.21 22.84 13.23 351 586
08-AUG 00:06:13.000 0 5.7 5.6 8.9 5.3 99.89 0 1 1 13.87 13.87 23.21 23.21 22.91 13.15 338 595
08-AUG 00:06:13.093 0 5.7 5.6 8.9 5.3 99.89 0 1 1 13.87 13.88 23.21 23.21 22.91 13.23 335 595
08-AUG 00:06:13.187 0 5.6 5.6 9.0 5.3 99.91 0 1 1 13.87 13.87 23.21 23.21 22.91 13.15 335 595
08-AUG 00:06:13.281 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.87 23.05 23.05 22.91 13.15 335 595
08-AUG 00:06:13.375 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.86 23.09 23.09 22.77 13.23 335 595
08-AUG 00:06:13.468 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.89 23.09 23.09 22.84 13.23 335 595
08-AUG 00:06:13.562 0 5.6 5.6 8.9 5.2 99.89 0 1 1 13.87 13.90 23.09 23.09 22.84 13.15 335 595
08-AUG 00:06:13.656 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.90 23.21 23.21 22.84 13.23 335 595
08-AUG 00:06:13.750 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.85 23.09 23.09 22.91 13.15 335 595
08-AUG 00:06:13.843 0 5.6 5.6 8.9 5.2 99.89 0 1 1 13.87 13.87 23.30 23.30 22.84 13.15 335 595
08-AUG 00:06:13.937 0 5.6 5.6 8.9 5.2 99.89 0 1 1 13.87 13.89 23.30 23.30 22.84 13.23 338 590
08-AUG 00:06:14.031 0 5.6 5.6 8.9 5.3 99.91 0 1 1 13.87 13.82 23.21 23.21 22.98 13.15 345 566
08-AUG 00:06:14.125 0 5.6 5.6 8.9 5.3 99.91 0 1 1 13.87 13.86 23.09 23.09 22.98 13.15 345 558
08-AUG 00:06:14.218 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.84 23.09 23.09 22.91 13.15 345 558
08-AUG 00:06:14.312 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.87 23.09 23.09 22.84 13.23 345 558
08-AUG 00:06:14.406 0 5.5 5.6 9.0 5.2 99.91 0 1 1 13.87 13.88 23.09 23.09 22.84 13.23 345 558
08-AUG 00:06:14.500 0 5.5 5.6 9.0 5.2 99.91 0 1 1 13.87 13.87 23.09 23.09 22.84 13.23 345 558
08-AUG 00:06:14.593 0 5.5 5.6 9.0 5.2 99.91 0 1 1 13.87 13.89 23.09 23.09 22.84 13.23 345 558
08-AUG 00:06:14.687 0 5.6 5.6 9.0 5.2 99.89 0 1 1 13.87 13.91 23.09 23.09 22.77 13.23 345 558
08-AUG 00:06:14.781 0 5.6 5.6 9.0 5.2 99.89 0 1 1 13.87 13.88 23.21 23.21 22.84 13.15 345 558
08-AUG 00:06:14.875 0 5.6 5.6 9.0 5.2 99.89 0 1 1 13.87 13.89 23.21 23.21 22.98 13.15 345 558
08-AUG 00:06:14.968 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.85 23.09 23.09 22.91 13.23 339 606
08-AUG 00:06:15.062 0 5.6 5.6 8.9 5.2 99.89 0 1 1 13.87 13.85 23.09 23.09 22.91 13.15 339 606
08-AUG 00:06:15.156 0 5.5 5.6 9.0 5.2 99.89 0 1 1 13.87 13.88 23.21 23.21 22.84 13.15 339 613
08-AUG 00:06:15.250 0 5.5 5.6 9.0 5.2 99.89 0 1 1 13.87 13.88 23.21 23.21 22.91 13.23 339 613
08-AUG 00:06:15.343 0 5.5 5.6 9.0 5.2 99.91 0 1 1 13.87 13.88 23.09 23.09 22.91 13.23 339 613
08-AUG 00:06:15.437 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.83 23.09 23.09 22.98 13.23 339 613
08-AUG 00:06:15.531 0 5.6 5.5 9.0 5.2 99.89 0 1 1 13.87 13.87 23.09 23.09 22.84 13.23 339 613
08-AUG 00:06:15.625 0 5.6 5.5 9.0 5.2 99.89 0 1 1 13.87 13.89 23.21 23.21 22.84 13.15 339 613
08-AUG 00:06:15.718 0 5.6 5.6 9.0 5.2 99.89 0 1 1 13.87 13.87 23.21 23.21 22.91 13.15 339 613
08-AUG 00:06:15.812 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.87 23.21 23.21 22.91 13.23 339 613
08-AUG 00:06:15.906 0 5.6 5.6 9.0 5.2 99.89 0 1 1 13.87 13.83 23.09 23.09 22.91 13.15 339 613
08-AUG 00:06:16.000 0 5.6 5.6 9.0 5.2 99.89 0 1 1 13.87 13.86 23.21 23.21 22.84 13.23 361 613
08-AUG 00:06:16.093 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.88 23.09 23.09 22.91 13.15 361 611
08-AUG 00:06:16.187 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.83 23.09 23.09 22.91 13.23 361 611
08-AUG 00:06:16.281 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.86 23.09 23.09 22.84 13.23 361 611
08-AUG 00:06:16.375 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.90 23.09 23.09 22.84 13.15 361 611
08-AUG 00:06:16.468 0 5.6 5.6 9.1 5.2 99.91 0 1 1 13.87 13.86 23.09 23.09 22.77 13.23 361 611
08-AUG 00:06:16.562 0 5.6 5.6 9.1 5.2 99.89 0 1 1 13.87 13.90 23.09 23.09 22.77 13.23 361 611
08-AUG 00:06:16.656 0 5.6 5.6 8.9 5.2 99.89 0 1 1 13.87 13.87 23.21 23.21 22.84 13.23 361 611
08-AUG 00:06:16.750 0 5.6 5.6 8.9 5.2 99.89 0 1 1 13.87 13.82 23.21 23.21 22.91 13.23 361 611
08-AUG 00:06:16.843 0 5.6 5.6 8.9 5.2 99.89 0 1 1 13.87 13.86 23.21 23.21 22.98 13.23 361 611
08-AUG 00:06:16.937 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.78 23.21 23.21 22.91 13.23 360 600
08-AUG 00:06:17.031 0 5.6 5.6 9.0 5.3 99.89 0 1 1 13.87 13.85 23.09 23.09 22.91 13.15 343 578
08-AUG 00:06:17.125 0 5.6 5.6 9.0 5.3 99.89 0 1 1 13.87 13.90 23.30 23.30 22.84 13.15 343 573
08-AUG 00:06:17.218 0 5.6 5.5 8.9 5.3 99.89 0 1 1 13.87 13.84 23.21 23.21 23.05 13.15 343 573
08-AUG 00:06:17.312 0 5.6 5.5 8.9 5.3 99.91 0 1 1 13.87 13.81 23.21 23.21 23.12 13.23 343 573
08-AUG 00:06:17.406 0 5.6 5.5 8.9 5.3 99.91 0 1 1 13.87 13.83 23.09 23.09 22.98 13.23 343 573
08-AUG 00:06:17.500 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.82 23.05 23.05 22.91 13.23 343 573
08-AUG 00:06:17.593 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.85 23.09 23.09 22.84 13.23 343 573
08-AUG 00:06:17.687 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.87 23.09 23.09 22.84 13.23 343 573
08-AUG 00:06:17.781 0 5.6 5.6 8.9 5.2 99.89 0 1 1 13.87 13.90 23.09 23.09 22.84 13.23 343 573
08-AUG 00:06:17.875 0 5.6 5.6 8.9 5.2 99.89 0 1 1 13.87 13.87 23.21 23.21 22.84 13.31 343 573
08-AUG 00:06:17.968 0 5.6 5.6 9.0 5.3 99.91 0 1 1 13.87 13.88 23.09 23.09 22.91 13.23 349 572
08-AUG 00:06:18.062 0 5.6 5.6 9.0 5.3 99.91 0 1 1 13.87 13.87 23.09 23.09 22.91 13.23 349 572
08-AUG 00:06:18.156 0 5.6 5.6 8.8 5.3 99.91 0 1 1 13.87 13.93 23.09 23.09 22.77 13.23 349 568
08-AUG 00:06:18.250 0 5.6 5.6 8.8 5.3 99.91 0 1 1 13.87 13.87 23.05 23.05 22.84 13.23 349 568
08-AUG 00:06:18.343 0 5.6 5.6 8.8 5.3 99.91 0 1 1 13.87 13.90 23.09 23.09 22.77 13.23 349 568
08-AUG 00:06:18.437 0 5.6 5.6 8.9 5.3 99.89 0 1 1 13.87 13.92 23.09 23.09 22.77 13.23 349 568
08-AUG 00:06:18.531 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.87 23.21 23.21 22.84 13.23 349 568
08-AUG 00:06:18.625 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.87 23.05 23.05 22.91 13.23 349 568
08-AUG 00:06:18.718 0 5.6 5.6 8.9 5.3 99.91 0 1 1 13.87 13.87 23.09 23.09 22.84 13.15 349 568
08-AUG 00:06:18.812 0 5.6 5.6 8.9 5.3 99.91 0 1 1 13.87 13.90 23.09 23.09 22.77 13.23 349 568
08-AUG 00:06:18.906 0 5.6 5.6 8.9 5.3 99.91 0 1 1 13.87 13.87 23.09 23.09 22.84 13.15 345 567
08-AUG 00:06:19.000 0 5.6 5.6 8.9 5.3 99.91 0 1 1 13.87 13.88 23.09 23.09 22.77 13.15 340 567
08-AUG 00:06:19.093 0 5.6 5.6 8.9 5.3 99.91 0 1 1 13.87 13.90 23.09 23.09 22.77 13.15 340 568
08-AUG 00:06:19.187 0 5.6 5.6 8.9 5.3 99.91 0 1 1 13.87 13.90 23.09 23.09 22.84 13.15 340 568
08-AUG 00:06:19.281 0 5.6 5.5 8.9 5.2 99.91 0 1 1 13.87 13.91 23.09 23.09 22.84 13.15 340 568
08-AUG 00:06:19.375 0 5.6 5.5 8.9 5.2 99.91 0 1 1 13.87 13.86 23.05 23.05 22.84 13.15 340 568
08-AUG 00:06:19.468 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.84 23.09 23.09 22.77 13.15 340 568
08-AUG 00:06:19.562 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.90 23.09 23.09 22.77 13.15 340 568
08-AUG 00:06:19.656 0 5.6 5.6 8.9 5.2 99.89 0 1 1 13.87 13.87 23.09 23.09 22.77 13.15 340 568
08-AUG 00:06:19.750 0 5.6 5.6 8.9 5.2 99.89 0 1 1 13.87 13.88 23.21 23.21 22.84 13.15 340 568
08-AUG 00:06:19.843 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.86 23.09 23.09 22.91 13.15 340 568
08-AUG 00:06:19.937 0 5.7 5.6 8.8 5.2 99.89 0 1 1 13.87 13.84 23.09 23.09 22.91 13.15 337 577
08-AUG 00:06:20.031 0 5.7 5.5 8.8 5.2 99.89 0 1 1 13.87 13.89 23.21 23.21 22.77 13.15 336 577
08-AUG 00:06:20.125 0 5.7 5.5 8.8 5.2 99.89 0 1 1 13.87 13.83 23.21 23.21 22.91 13.15 336 574
08-AUG 00:06:20.218 0 5.6 5.6 8.9 5.2 99.89 0 1 1 13.87 13.82 23.21 23.21 22.98 13.15 336 574
08-AUG 00:06:20.312 0 5.6 5.6 8.9 5.2 99.91 0 1 1 13.87 13.82 23.21 23.21 22.91 13.15 336 574
08-AUG 00:06:20.406 0 5.6 5.6 9.0 5.2 99.89 0 1 1 13.87 13.86 23.05 23.05 22.91 13.15 336 574
08-AUG 00:06:20.500 0 5.6 5.6 9.0 5.2 99.89 0 1 1 13.87 13.84 23.21 23.21 22.77 13.15 336 574
08-AUG 00:06:20.593 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.88 23.09 23.09 22.91 13.15 336 574
08-AUG 00:06:20.687 0 5.7 5.6 9.0 5.2 99.91 0 1 1 13.87 13.82 23.09 23.09 22.91 13.23 336 574
08-AUG 00:06:20.781 0 5.7 5.6 9.0 5.2 99.89 0 1 1 13.87 13.86 23.09 23.09 22.84 13.23 336 574
08-AUG 00:06:20.875 0 5.7 5.6 9.0 5.2 99.89 0 1 1 13.87 13.91 23.21 23.21 22.77 13.15 336 574
08-AUG 00:06:20.968 0 5.6 5.5 9.0 5.2 99.89 0 1 1 13.87 13.89 23.21 23.21 22.98 13.23 351 591
08-AUG 00:06:21.062 0 5.6 5.5 9.0 5.2 99.89 0 1 1 13.87 13.85 23.21 23.21 22.91 13.23 351 591
08-AUG 00:06:21.156 0 5.6 5.5 9.0 5.2 99.89 0 1 1 13.87 13.82 23.21 23.21 22.98 13.23 352 591
08-AUG 00:06:21.250 0 5.6 5.5 9.0 5.2 99.89 0 1 1 13.87 13.87 23.21 23.21 22.91 13.23 352 591
08-AUG 00:06:21.343 0 5.6 5.5 9.0 5.2 99.89 0 1 1 13.87 13.87 23.21 23.21 22.91 13.15 352 591
08-AUG 00:06:21.437 0 5.7 5.5 8.9 5.2 99.91 0 1 1 13.87 13.82 23.21 23.21 22.98 13.15 352 591
08-AUG 00:06:21.531 0 5.7 5.6 8.9 5.2 99.91 0 1 1 13.87 13.82 23.09 23.09 22.91 13.15 352 591
08-AUG 00:06:21.625 0 5.7 5.6 8.9 5.2 99.91 0 1 1 13.87 13.90 23.09 23.09 22.84 13.23 352 591
08-AUG 00:06:21.718 0 5.6 5.6 9.0 5.2 99.89 0 1 1 13.87 13.89 23.21 23.21 22.84 13.23 352 591
08-AUG 00:06:21.812 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.91 23.21 23.21 22.84 13.23 352 591
08-AUG 00:06:21.906 0 5.7 5.6 9.0 5.2 99.91 0 1 1 13.87 13.82 23.09 23.09 22.91 13.23 358 588
08-AUG 00:06:22.000 0 5.7 5.5 9.0 5.3 99.91 0 1 1 13.87 13.87 23.09 23.09 22.84 13.23 359 547
08-AUG 00:06:22.093 0 5.7 5.5 9.0 5.3 99.89 0 1 1 13.87 13.89 23.21 23.21 22.84 13.23 359 547
08-AUG 00:06:22.187 0 5.6 5.5 9.0 5.3 99.91 0 1 1 13.87 13.88 23.21 23.21 22.77 13.23 359 547
08-AUG 00:06:22.281 0 5.6 5.5 9.0 5.3 99.91 0 1 1 13.87 13.87 23.09 23.09 22.91 13.15 359 547
08-AUG 00:06:22.375 0 5.6 5.5 9.0 5.3 99.91 0 1 1 13.87 13.86 23.09 23.09 22.84 13.23 359 547
08-AUG 00:06:22.468 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.87 23.09 23.09 22.84 13.23 359 547
08-AUG 00:06:22.562 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.87 23.09 23.09 22.84 13.23 359 547
08-AUG 00:06:22.656 0 5.6 5.6 9.1 5.2 99.91 0 1 1 13.87 13.90 23.05 23.05 22.77 13.23 359 547
08-AUG 00:06:22.750 0 5.6 5.6 9.1 5.3 99.91 0 1 1 13.87 13.88 23.09 23.09 22.77 13.23 359 547
08-AUG 00:06:22.843 0 5.6 5.6 9.1 5.3 99.91 0 1 1 13.87 13.90 23.09 23.09 22.84 13.23 359 547
08-AUG 00:06:22.937 0 5.7 5.6 9.0 5.3 99.91 0 1 1 13.87 13.89 23.09 23.09 22.77 13.15 354 549
08-AUG 00:06:23.031 0 5.7 5.6 9.0 5.3 99.91 0 1 1 13.87 13.85 23.09 23.09 22.77 13.15 345 605
08-AUG 00:06:23.125 0 5.7 5.6 9.0 5.3 99.91 0 1 1 13.87 13.91 23.09 23.09 22.84 13.15 345 605
08-AUG 00:06:23.218 0 5.8 5.6 9.0 5.2 99.89 0 1 1 13.87 13.87 23.09 23.09 22.77 13.23 345 605
08-AUG 00:06:23.312 0 5.8 5.6 9.0 5.2 99.89 0 1 1 13.87 13.94 23.09 23.09 22.84 13.15 345 605
08-AUG 00:06:23.406 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.89 23.09 23.09 22.77 13.15 345 605
08-AUG 00:06:23.500 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.89 22.96 22.96 22.84 13.15 345 605
08-AUG 00:06:23.593 0 5.6 5.6 9.0 5.2 99.91 0 1 1 13.87 13.89 22.84 22.84 22.77 13.15 345 605
08-AUG 00:06:23.687 0 5.6 5.6 9.0 5.2 99.89 0 1 1 13.87 13.91 22.84 22.84 22.70 13.15 345 605
08-AUG 00:06:23.781 0 5.6 5.6 9.0 5.2 99.89 0 1 1 13.87 13.94 22.71 22.71 22.56 13.15 345 605
08-AUG 00:06:23.875 0 5.6 5.6 9.0 5.2 99.89 0 1 1 13.87 13.97 22.59 22.59 22.49 13.07 345 605
08-AUG 00:06:23.968 0 5.6 5.6 8.9 5.1 99.89 0 1 1 13.87 13.98 22.46 22.46 22.35 13.07 349 556
08-AUG 00:06:24.062 0 5.6 5.6 8.9 5.1 99.89 0 1 1 13.87 14.01 22.46 22.46 22.35 13.07 349 556
08-AUG 00:06:24.156 0 5.6 5.6 8.9 5.1 99.89 0 1 1 13.87 14.01 22.34 22.34 22.21 12.99 346 556
08-AUG 00:06:24.250 0 5.6 5.6 8.9 5.0 99.89 0 1 1 13.87 14.04 22.21 22.21 22.14 12.99 346 556
08-AUG 00:06:24.343 0 5.6 5.6 8.9 5.0 99.89 0 1 1 13.87 14.05 22.09 22.09 22.00 12.91 346 556
08-AUG 00:06:24.437 0 5.5 5.6 9.0 5.0 99.88 0 1 1 13.87 14.09 22.09 22.09 21.93 12.83 346 556
08-AUG 00:06:24.531 0 5.5 5.6 9.0 5.0 99.87 0 1 1 13.86 14.06 21.96 21.96 21.79 12.75 346 556
08-AUG 00:06:24.625 0 5.5 5.6 9.0 5.0 99.87 0 1 1 13.86 14.08 21.84 21.84 21.72 12.75 346 556
08-AUG 00:06:24.718 0 5.6 5.6 8.9 5.0 99.87 0 1 1 13.86 14.08 21.71 21.71 21.58 12.67 346 556
08-AUG 00:06:24.812 0 5.6 5.6 8.9 5.0 99.86 0 1 1 13.86 14.11 21.71 21.71 21.58 12.59 346 556
08-AUG 00:06:24.906 0 5.8 5.6 9.0 5.0 99.83 0 1 1 13.86 14.08 21.59 21.59 21.37 12.51 342 578
08-AUG 00:06:25.000 0 5.8 5.9 9.0 5.0 99.83 0 1 1 13.86 14.13 21.46 21.46 21.37 12.51 317 578
08-AUG 00:06:25.093 0 5.8 5.9 9.0 5.0 99.82 0 1 1 13.85 14.15 21.34 21.34 21.16 12.43 316 570
08-AUG 00:06:25.187 0 6.5 5.9 9.1 5.0 99.78 0 1 1 13.85 14.16 21.34 21.34 21.23 12.35 316 570
08-AUG 00:06:25.281 0 6.5 6.3 9.1 5.1 99.75 0 1 1 13.85 14.14 21.21 21.21 21.02 12.19 316 570
08-AUG 00:06:25.375 0 6.5 6.3 9.1 5.1 99.75 0 1 1 13.85 14.13 21.09 21.09 20.95 12.19 316 570
08-AUG 00:06:25.468 0 7.1 6.6 9.2 5.1 99.73 0 1 1 13.84 14.15 20.96 20.96 20.81 12.11 316 570
08-AUG 00:06:25.562 0 7.1 6.6 9.2 5.1 99.70 0 1 1 13.84 14.14 20.96 20.96 20.81 12.03 316 570
08-AUG 00:06:25.656 0 7.3 6.6 9.1 5.1 99.66 0 1 1 13.84 14.13 20.84 20.84 20.67 11.95 316 570
08-AUG 00:06:25.750 0 7.3 6.8 9.1 5.2 99.66 0 1 1 13.83 14.12 20.71 20.71 20.60 11.87 316 570
08-AUG 00:06:25.843 0 7.3 6.8 9.1 5.2 99.61 0 1 1 13.82 14.09 20.59 20.59 20.46 11.79 316 570
08-AUG 00:06:25.937 0 7.8 6.8 9.2 5.2 99.58 0 1 1 13.82 14.09 20.59 20.59 20.39 11.70 317 570
08-AUG 00:06:26.031 0 7.8 7.0 9.2 5.3 99.53 0 1 1 13.82 14.08 20.46 20.46 20.32 11.62 326 572
08-AUG 00:06:26.125 0 7.8 7.0 9.2 5.3 99.53 0 1 1 13.81 14.14 20.34 20.34 20.25 11.54 328 574
08-AUG 00:06:26.218 0 8.0 7.2 9.1 5.3 99.49 0 1 1 13.81 14.07 20.21 20.21 20.04 11.46 328 574
08-AUG 00:06:26.312 0 8.0 7.2 9.1 5.3 99.43 0 1 1 13.81 14.12 20.21 20.21 20.04 11.38 328 574
08-AUG 00:06:26.406 0 8.1 7.2 9.1 5.3 99.38 0 1 1 13.80 14.07 20.09 20.09 19.90 11.30 328 574
08-AUG 00:06:26.500 0 8.1 7.3 9.1 5.3 99.38 0 1 1 13.79 14.10 19.96 19.96 19.90 11.30 328 574
08-AUG 00:06:26.593 0 8.1 7.3 9.1 5.3 99.33 0 1 1 13.78 14.10 19.84 19.84 19.76 11.14 328 574
08-AUG 00:06:26.687 0 8.2 7.3 9.2 5.3 99.28 0 1 1 13.78 14.06 19.84 19.84 19.69 11.06 328 574
08-AUG 00:06:26.781 0 8.2 7.4 9.2 5.4 99.24 0 1 1 13.77 14.07 19.71 19.71 19.55 10.98 328 574
08-AUG 00:06:26.875 0 8.2 7.4 9.2 5.4 99.24 0 1 1 13.76 14.07 19.59 19.59 19.48 10.90 328 574
08-AUG 00:06:26.968 0 8.3 7.4 9.1 5.4 99.18 0 1 1 13.76 14.05 19.46 19.46 19.34 10.82 352 590
08-AUG 00:06:27.062 0 8.3 7.4 9.1 5.4 99.12 0 1 1 13.76 13.98 19.46 19.46 19.34 10.82 352 590
08-AUG 00:06:27.156 0 8.4 7.4 9.0 5.4 99.06 0 1 1 13.75 14.00 19.34 19.34 19.20 10.66 354 595
08-AUG 00:06:27.250 0 8.4 7.5 9.0 5.5 99.06 0 1 1 13.74 14.01 19.21 19.21 19.05 10.66 354 595
08-AUG 00:06:27.343 0 8.4 7.5 9.0 5.5 99.00 0 1 1 13.73 14.01 19.09 19.09 18.98 10.58 354 595
08-AUG 00:06:27.437 0 8.3 7.5 9.0 5.5 98.94 0 1 1 13.73 14.02 19.09 19.09 18.91 10.50 354 595
08-AUG 00:06:27.531 0 8.3 7.5 9.0 5.5 98.87 0 1 1 13.72 13.97 18.96 18.96 18.77 10.42 354 595
08-AUG 00:06:27.625 0 8.3 7.5 9.0 5.5 98.87 0 1 1 13.71 13.98 18.84 18.84 18.70 10.34 354 595
08-AUG 00:06:27.718 0 8.3 7.5 9.1 5.5 98.80 0 1 1 13.70 13.94 18.71 18.71 18.63 10.26 354 595
08-AUG 00:06:27.812 0 8.3 7.5 9.1 5.5 98.74 0 1 1 13.70 13.91 18.71 18.71 18.56 10.26 354 595
08-AUG 00:06:27.906 0 8.3 7.5 9.1 5.5 98.66 0 1 1 13.69 13.89 18.59 18.59 18.42 10.18 357 614
08-AUG 00:06:28.000 0 8.3 7.5 9.1 5.6 98.66 0 1 1 13.68 13.92 18.46 18.46 18.36 10.02 378 663
08-AUG 00:06:28.093 0 8.3 7.5 9.1 5.6 98.59 0 1 1 13.67 13.87 18.34 18.34 18.21 10.02 382 663
08-AUG 00:06:28.187 0 8.4 7.5 9.1 5.6 98.51 0 1 1 13.67 13.90 18.34 18.34 18.14 10.02 382 663
08-AUG 00:06:28.281 0 8.4 7.5 9.1 5.6 98.45 0 1 1 13.65 13.89 18.21 18.21 18.00 9.86 382 663
08-AUG 00:06:28.375 0 8.4 7.5 9.1 5.6 98.45 0 1 1 13.64 13.90 18.09 18.09 17.93 9.86 382 663
08-AUG 00:06:28.468 0 8.3 7.5 9.2 5.7 98.36 0 1 1 13.63 13.90 17.96 17.96 17.86 9.78 382 663
08-AUG 00:06:28.562 0 8.3 7.5 9.2 5.7 98.28 0 1 1 13.63 13.86 17.96 17.96 17.79 9.70 382 663
08-AUG 00:06:28.656 0 8.4 7.5 9.2 5.7 98.20 0 1 1 13.62 13.82 17.84 17.84 17.65 9.61 382 663
08-AUG 00:06:28.750 0 8.4 7.6 9.2 5.8 98.20 0 1 1 13.60 13.80 17.71 17.71 17.58 9.61 382 663
08-AUG 00:06:28.843 0 8.4 7.6 9.2 5.8 98.12 0 1 1 13.59 13.82 17.59 17.59 17.44 9.54 382 663
08-AUG 00:06:28.937 0 8.3 7.6 9.3 5.8 98.04 0 1 1 13.59 13.76 17.59 17.59 17.44 9.45 388 657
08-AUG 00:06:29.031 0 8.3 7.5 9.3 5.8 97.95 0 1 1 13.58 13.79 17.46 17.46 17.30 9.45 411 655
08-AUG 00:06:29.125 0 8.3 7.5 9.3 5.8 97.95 0 1 1 13.57 13.82 17.34 17.34 17.23 9.38 412 655
08-AUG 00:06:29.218 0 7.9 7.2 9.4 5.8 97.86 0 1 1 13.55 13.79 17.21 17.21 17.09 9.29 412 655
08-AUG 00:06:29.312 0 7.9 7.2 9.4 5.8 97.77 0 1 1 13.55 13.77 17.21 17.21 17.09 9.21 412 655
08-AUG 00:06:29.406 0 7.7 7.2 9.2 5.8 97.68 0 1 1 13.54 13.75 17.09 17.09 16.95 9.21 412 655
08-AUG 00:06:29.500 0 7.7 7.0 9.2 5.8 97.68 0 1 1 13.53 13.76 16.96 16.96 16.81 9.13 412 655
08-AUG 00:06:29.593 0 7.7 7.0 9.2 5.8 97.59 0 1 1 13.51 13.75 16.84 16.84 16.67 9.05 412 655
08-AUG 00:06:29.687 0 7.4 7.0 9.2 5.8 97.50 0 1 1 13.51 13.69 16.84 16.84 16.74 9.05 412 655
08-AUG 00:06:29.781 0 7.4 6.9 9.2 5.7 97.39 0 1 1 13.50 13.72 16.71 16.71 16.53 8.97 412 655
08-AUG 00:06:29.875 0 7.4 6.9 9.2 5.7 97.39 0 1 1 13.48 13.72 16.59 16.59 16.46 8.89 412 655
08-AUG 00:06:29.968 0 7.0 6.4 9.0 5.4 97.29 0 1 1 13.47 13.69 16.46 16.46 16.32 8.81 418 667
08-AUG 00:06:30.062 0 7.0 6.4 9.0 5.4 97.20 0 1 1 13.47 13.69 16.46 16.46 16.32 8.81 418 667
08-AUG 00:06:30.156 0 6.5 6.4 8.6 5.4 97.09 0 1 1 13.45 13.68 16.34 16.34 16.18 8.73 423 674
08-AUG 00:06:30.250 0 6.5 6.0 8.6 5.3 97.09 0 1 1 13.43 13.63 16.21 16.21 16.11 8.73 423 674
08-AUG 00:06:30.343 0 6.5 6.0 8.6 5.3 96.99 0 1 1 13.42 13.61 16.09 16.09 15.97 8.66 423 674
08-AUG 00:06:30.437 0 6.4 6.0 8.3 5.3 96.89 0 1 1 13.42 13.58 16.09 16.09 15.93 8.66 423 674
08-AUG 00:06:30.531 0 6.4 5.8 8.3 4.9 96.77 0 1 1 13.40 13.55 15.96 15.96 15.83 8.58 423 674
08-AUG 00:06:30.625 0 6.4 5.8 8.3 4.9 96.77 0 1 1 13.38 13.54 15.84 15.84 15.69 8.50 423 674
08-AUG 00:06:30.718 0 6.4 5.6 8.2 4.7 96.66 0 1 1 13.37 13.52 15.71 15.71 15.62 8.50 423 674
08-AUG 00:06:30.812 0 6.4 5.6 8.2 4.7 96.55 0 1 1 13.37 13.51 15.71 15.71 15.55 8.42 423 674
08-AUG 00:06:30.906 0 6.2 5.6 8.0 4.7 96.44 0 1 1 13.35 13.53 15.59 15.59 15.41 8.42 425 676
08-AUG 00:06:31.000 0 6.2 5.4 8.0 4.5 96.44 0 1 1 13.33 13.52 15.46 15.46 15.34 8.34 430 703
08-AUG 00:06:31.093 0 6.2 5.4 8.0 4.5 96.33 0 1 1 13.32 13.55 15.34 15.34 15.27 8.26 430 703
08-AUG 00:06:31.187 0 6.3 5.4 7.9 4.5 96.22 0 1 1 13.32 13.50 15.34 15.34 15.20 8.26 430 703
08-AUG 00:06:31.281 0 6.3 5.3 7.9 4.4 96.10 0 1 1 13.30 13.50 15.21 15.21 15.12 8.18 430 703
08-AUG 00:06:31.375 0 6.3 5.3 7.9 4.4 96.10 0 1 1 13.28 13.49 15.09 15.09 14.98 8.10 430 703
08-AUG 00:06:31.468 0 6.3 5.2 7.8 4.4 95.97 0 1 1 13.26 13.46 14.96 14.96 14.85 8.10 430 703
08-AUG 00:06:31.562 0 6.3 5.2 7.8 4.4 95.87 0 1 1 13.26 13.47 14.96 14.96 14.78 8.02 430 703
08-AUG 00:06:31.656 0 6.2 5.2 7.8 4.4 95.74 0 1 1 13.24 13.42 14.84 14.84 14.64 8.02 430 703
08-AUG 00:06:31.750 0 6.2 5.2 7.8 4.3 95.74 0 1 1 13.23 13.47 14.71 14.71 14.57 7.94 430 703
08-AUG 00:06:31.843 0 6.2 5.2 7.8 4.3 95.62 0 1 1 13.21 13.41 14.59 14.59 14.50 7.86 430 703
08-AUG 00:06:31.937 0 6.3 5.2 7.6 4.3 95.50 0 1 1 13.21 13.39 14.59 14.59 14.43 7.78 429 703
08-AUG 00:06:32.031 0 6.3 5.1 7.6 4.3 95.37 0 1 1 13.19 13.38 14.46 14.46 14.29 7.78 428 699
08-AUG 00:06:32.125 0 6.3 5.1 7.6 4.3 95.37 0 1 1 13.17 13.34 14.34 14.34 14.21 7.70 427 695
08-AUG 00:06:32.218 0 6.3 5.0 7.7 4.3 95.25 0 1 1 13.15 13.32 14.21 14.21 14.07 7.70 427 695
08-AUG 00:06:32.312 0 6.3 5.0 7.7 4.3 95.12 0 1 1 13.15 13.34 14.21 14.21 14.07 7.62 427 695
08-AUG 00:06:32.406 0 6.2 5.0 7.7 4.3 94.99 0 1 1 13.13 13.31 14.09 14.09 13.93 7.62 427 695
08-AUG 00:06:32.500 0 6.2 5.0 7.7 4.3 94.99 0 1 1 13.11 13.28 13.96 13.96 13.82 7.54 427 695
08-AUG 00:06:32.593 0 6.2 5.0 7.7 4.3 94.85 0 1 1 13.09 13.29 13.84 13.84 13.72 7.45 427 695
08-AUG 00:06:32.687 0 6.2 5.0 7.6 4.3 94.72 0 1 1 13.09 13.23 13.84 13.84 13.68 7.45 427 695
08-AUG 00:06:32.781 0 6.2 4.9 7.6 4.3 94.60 0 1 1 13.07 13.23 13.71 13.71 13.58 7.38 427 695
08-AUG 00:06:32.875 0 6.2 4.9 7.6 4.3 94.60 0 1 1 13.05 13.21 13.59 13.59 13.44 7.38 427 695
08-AUG 00:06:32.968 0 6.1 4.8 7.6 4.3 94.46 0 1 1 13.03 13.20 13.46 13.46 13.37 7.29 421 670
08-AUG 00:06:33.062 0 6.1 4.8 7.6 4.3 94.32 0 1 1 13.03 13.22 13.46 13.46 13.30 7.29 421 670
08-AUG 00:06:33.156 0 6.0 4.8 7.6 4.3 94.18 0 1 1 13.01 13.16 13.34 13.34 13.23 7.21 421 665
08-AUG 00:06:33.250 0 6.0 4.7 7.6 4.4 94.18 0 1 1 12.98 13.17 13.21 13.21 13.09 7.13 421 665
08-AUG 00:06:33.343 0 6.0 4.7 7.6 4.4 94.06 0 1 1 12.97 13.13 13.09 13.09 12.95 7.13 421 665
08-AUG 00:06:33.437 0 5.8 4.7 7.6 4.4 93.91 0 1 1 12.97 13.14 13.09 13.09 12.95 7.05 421 665
08-AUG 00:06:33.531 0 5.8 4.6 7.6 4.4 93.77 0 1 1 12.94 13.14 12.96 12.96 12.81 7.05 421 665
08-AUG 00:06:33.625 0 5.8 4.6 7.6 4.4 93.77 0 1 1 12.92 13.14 12.84 12.84 12.74 7.05 421 665
08-AUG 00:06:33.718 0 5.5 4.4 7.6 4.4 93.62 0 1 1 12.90 13.11 12.71 12.71 12.55 6.97 421 665
08-AUG 00:06:33.812 0 5.5 4.4 7.6 4.4 93.47 0 1 1 12.90 13.09 12.71 12.71 12.53 6.89 421 665
08-AUG 00:06:33.906 0 5.3 4.4 7.5 4.4 93.33 0 1 1 12.88 13.02 12.59 12.59 12.46 6.81 419 659
08-AUG 00:06:34.000 0 5.3 4.3 7.5 4.5 93.33 0 1 1 12.85 13.01 12.46 12.46 12.32 6.81 413 625
08-AUG 00:06:34.093 0 5.3 4.3 7.5 4.5 93.18 0 1 1 12.83 12.98 12.34 12.34 12.20 6.81 413 624
08-AUG 00:06:34.187 0 5.0 4.3 7.6 4.5 93.04 0 1 1 12.83 12.95 12.34 12.34 12.18 6.73 413 624
08-AUG 00:06:34.281 0 5.0 4.2 7.6 4.5 92.89 0 1 1 12.81 12.92 12.21 12.21 12.04 6.73 413 624
08-AUG 00:06:34.375 0 5.0 4.2 7.6 4.5 92.89 0 1 1 12.78 12.96 12.09 12.09 11.97 6.65 413 624
08-AUG 00:06:34.468 0 5.0 4.2 7.5 4.6 92.74 0 1 1 12.76 12.92 11.96 11.96 11.83 6.65 413 624
08-AUG 00:06:34.562 0 5.0 4.2 7.5 4.6 92.58 0 1 1 12.76 12.90 11.96 11.96 11.83 6.57 413 624
08-AUG 00:06:34.656 0 5.0 4.2 7.5 4.6 92.42 0 1 1 12.73 12.87 11.84 11.84 11.69 6.57 413 624
08-AUG 00:06:34.750 0 5.0 4.1 7.5 4.7 92.42 0 1 1 12.71 12.89 11.71 11.71 11.62 6.57 413 624
08-AUG 00:06:34.843 0 5.0 4.1 7.5 4.7 92.27 0 1 1 12.69 12.85 11.59 11.59 11.48 6.49 413 624
08-AUG 00:06:34.937 0 5.0 4.1 7.5 4.7 92.12 0 1 1 12.69 12.85 11.59 11.59 11.41 6.49 417 623
08-AUG 00:06:35.031 0 5.0 4.1 7.5 4.8 91.96 0 1 1 12.67 12.81 11.46 11.46 11.27 6.41 428 586
08-AUG 00:06:35.125 0 5.0 4.1 7.5 4.8 91.96 0 1 1 12.64 12.85 11.34 11.34 11.20 6.41 428 586
08-AUG 00:06:35.218 0 5.3 4.2 7.4 4.9 91.81 0 1 1 12.62 12.76 11.21 11.21 11.06 6.33 428 586
08-AUG 00:06:35.312 0 5.3 4.2 7.4 4.9 91.64 0 1 1 12.62 12.76 11.21 11.21 11.06 6.33 428 586
08-AUG 00:06:35.406 0 5.5 4.2 7.4 4.9 91.48 0 1 1 12.59 12.73 11.30 11.30 10.99 6.25 428 586
08-AUG 00:06:35.500 0 5.5 4.2 7.4 4.9 91.48 0 1 1 12.57 12.66 11.30 11.30 10.99 6.25 428 586
08-AUG 00:06:35.593 0 5.5 4.2 7.4 4.9 91.32 0 1 1 12.54 12.60 11.30 11.30 10.99 6.17 428 586
08-AUG 00:06:35.687 0 5.6 4.2 7.3 4.9 91.17 0 1 1 12.54 12.54 11.30 11.30 10.99 6.17 428 586
08-AUG 00:06:35.781 0 5.6 4.1 7.3 5.0 91.00 0 1 1 12.52 12.45 11.30 11.30 10.99 6.17 428 586
08-AUG 00:06:35.875 0 5.6 4.1 7.3 5.0 91.00 0 1 1 12.49 12.46 11.30 11.30 10.99 6.17 428 586
08-AUG 00:06:35.968 0 5.6 4.1 7.4 4.9 90.85 0 1 1 12.47 12.44 11.30 11.30 10.99 6.25 407 573
08-AUG 00:06:36.062 0 5.6 4.1 7.4 4.9 90.68 0 1 1 12.47 12.44 11.30 11.30 10.99 6.25 407 573
08-AUG 00:06:36.156 0 5.5 4.1 7.3 4.9 90.52 0 1 1 12.44 12.45 11.30 11.30 11.06 6.25 406 572
08-AUG 00:06:36.250 0 5.5 4.2 7.3 4.9 90.52 0 1 1 12.42 12.46 11.30 11.30 11.01 6.25 406 572
08-AUG 00:06:36.343 0 5.5 4.2 7.3 4.9 90.35 0 1 1 12.39 12.45 11.30 11.30 11.01 6.25 406 572
08-AUG 00:06:36.437 0 5.5 4.2 7.2 4.9 90.21 0 1 1 12.39 12.45 11.30 11.30 10.99 6.25 406 572
08-AUG 00:06:36.531 0 5.5 4.0 7.2 5.0 90.05 0 1 1 12.37 12.44 11.30 11.30 11.01 6.25 406 572
08-AUG 00:06:36.625 0 5.5 4.0 7.2 5.0 90.05 0 1 1 12.35 12.40 11.30 11.30 11.01 6.25 406 572
08-AUG 00:06:36.718 0 5.5 4.0 7.3 5.0 89.89 0 1 1 12.32 12.39 11.30 11.30 11.06 6.17 406 572
08-AUG 00:06:36.812 0 5.5 4.0 7.3 5.0 89.72 0 1 1 12.32 12.33 11.30 11.30 10.99 6.25 406 572
08-AUG 00:06:36.906 0 5.6 4.0 7.3 5.0 89.56 0 1 1 12.29 12.32 11.30 11.30 10.99 6.17 406 570
08-AUG 00:06:37.000 0 5.6 4.0 7.3 5.0 89.56 0 1 1 12.27 12.29 11.30 11.30 11.01 6.17 415 521
08-AUG 00:06:37.093 0 5.6 4.0 7.3 5.0 89.41 0 1 1 12.25 12.29 11.30 11.30 10.99 6.17 416 519
08-AUG 00:06:37.187 0 5.5 4.0 7.4 5.0 89.26 0 1 1 12.25 12.30 11.30 11.30 10.99 6.17 416 519
08-AUG 00:06:37.281 0 5.5 3.8 7.4 5.0 89.10 0 1 1 12.22 12.22 11.30 11.30 10.99 6.17 416 519
08-AUG 00:06:37.375 0 5.5 3.8 7.4 5.0 89.10 0 1 1 12.20 12.25 11.30 11.30 10.99 6.17 416 519
08-AUG 00:06:37.468 0 5.5 3.8 7.3 5.0 88.95 0 1 1 12.17 12.18 11.30 11.30 11.01 6.17 416 519
08-AUG 00:06:37.562 0 5.5 3.8 7.3 5.0 88.78 0 1 1 12.17 12.20 11.30 11.30 10.99 6.17 416 519
08-AUG 00:06:37.656 0 5.5 3.8 7.2 5.0 88.62 0 1 1 12.15 12.17 11.30 11.30 11.01 6.17 416 519
08-AUG 00:06:37.750 0 5.5 3.8 7.2 5.0 88.62 0 1 1 12.12 12.12 11.30 11.30 10.99 6.17 416 519
08-AUG 00:06:37.843 0 5.5 3.8 7.2 5.0 88.48 0 1 1 12.10 12.13 11.30 11.30 11.01 6.17 416 519
08-AUG 00:06:37.937 0 5.5 3.8 7.3 5.0 88.33 0 1 1 12.10 12.12 11.30 11.30 10.99 6.17 417 521
08-AUG 00:06:38.031 0 5.5 3.8 7.3 5.0 88.18 0 1 1 12.08 12.04 11.30 11.30 10.99 6.17 418 534
08-AUG 00:06:38.125 0 5.5 3.8 7.3 5.0 88.18 0 1 1 12.05 12.07 11.30 11.30 10.99 6.17 418 534
08-AUG 00:06:38.218 0 5.6 3.9 7.3 4.9 88.01 0 1 1 12.03 12.05 11.30 11.30 10.99 6.17 418 534
08-AUG 00:06:38.312 0 5.6 3.9 7.3 4.9 87.86 0 1 1 12.03 12.02 11.30 11.30 10.99 6.09 418 534
08-AUG 00:06:38.406 0 5.8 3.9 7.2 4.9 87.71 0 1 1 12.01 12.06 11.30 11.30 10.99 6.09 418 534
08-AUG 00:06:38.500 0 5.8 4.0 7.2 4.8 87.71 0 1 1 11.98 12.03 11.30 11.30 11.01 6.17 418 534
08-AUG 00:06:38.593 0 5.8 4.0 7.2 4.8 87.56 0 1 1 11.96 12.04 11.30 11.30 10.99 6.17 418 534
08-AUG 00:06:38.687 0 5.8 4.0 7.2 4.8 87.41 0 1 1 11.96 12.00 11.30 11.30 10.99 6.09 418 534
08-AUG 00:06:38.781 0 5.8 4.1 7.2 4.7 87.25 0 1 1 11.94 11.96 11.30 11.30 10.99 6.09 418 534
08-AUG 00:06:38.875 0 5.8 4.1 7.2 4.7 87.25 0 1 1 11.91 11.98 11.30 11.30 10.99 6.09 418 534
08-AUG 00:06:38.968 0 5.8 4.2 7.1 4.7 87.11 0 1 1 11.89 11.90 11.30 11.30 10.99 6.09 414 524
08-AUG 00:06:39.062 0 5.8 4.2 7.1 4.7 86.97 0 1 1 11.89 11.91 11.30 11.30 10.99 6.09 414 524
08-AUG 00:06:39.156 0 5.9 4.2 7.0 4.7 86.84 0 1 1 11.87 11.88 11.30 11.30 10.99 6.09 414 532
08-AUG 00:06:39.250 0 5.9 4.2 7.0 4.6 86.84 0 1 1 11.85 11.86 11.30 11.30 10.99 6.09 414 532
08-AUG 00:06:39.343 0 5.9 4.2 7.0 4.6 86.72 0 1 1 11.83 11.85 11.30 11.30 10.99 6.09 414 532
08-AUG 00:06:39.437 0 5.9 4.2 7.0 4.6 86.58 0 1 1 11.83 11.85 11.30 11.30 10.99 6.09 414 532
08-AUG 00:06:39.531 0 5.9 4.3 7.0 4.6 86.45 0 1 1 11.81 11.79 11.30 11.30 10.99 6.09 414 532
08-AUG 00:06:39.625 0 5.9 4.3 7.0 4.6 86.45 0 1 1 11.79 11.80 11.30 11.30 10.99 6.09 414 532
08-AUG 00:06:39.718 0 5.9 4.4 7.0 4.6 86.32 0 1 1 11.77 11.79 11.30 11.30 10.99 6.01 414 532
08-AUG 00:06:39.812 0 5.9 4.4 7.0 4.6 86.20 0 1 1 11.77 11.79 11.30 11.30 10.99 6.09 414 532
08-AUG 00:06:39.906 0 6.0 4.4 7.0 4.6 86.08 0 1 1 11.75 11.78 11.30 11.30 10.99 6.09 415 532
08-AUG 00:06:40.000 0 6.0 4.5 7.0 4.6 86.08 0 1 1 11.73 11.76 11.30 11.30 10.99 6.09 415 596
08-AUG 00:06:40.093 0 6.0 4.5 7.0 4.6 85.95 0 1 1 11.71 11.75 11.30 11.30 10.99 6.09 415 611
08-AUG 00:06:40.187 0 6.0 4.5 6.9 4.6 85.85 0 1 1 11.71 11.70 11.30 11.30 10.99 6.09 415 611
08-AUG 00:06:40.281 0 6.0 4.6 6.9 4.6 85.72 0 1 1 11.70 11.68 11.30 11.30 10.99 6.09 415 611
08-AUG 00:06:40.375 0 6.0 4.6 6.9 4.6 85.72 0 1 1 11.67 11.66 11.30 11.30 11.06 6.09 415 611
08-AUG 00:06:40.468 0 6.0 4.6 7.0 4.6 85.60 0 1 1 11.66 11.64 11.30 11.30 11.06 6.09 415 611
08-AUG 00:06:40.562 0 6.0 4.6 7.0 4.6 85.48 0 1 1 11.66 11.61 11.30 11.30 11.06 6.09 415 611
08-AUG 00:06:40.656 0 6.0 4.6 7.0 4.6 85.36 0 1 1 11.64 11.64 11.30 11.30 11.06 6.09 415 611
08-AUG 00:06:40.750 0 6.0 4.7 7.0 4.5 85.36 0 1 1 11.62 11.63 11.30 11.30 11.06 6.09 415 611
08-AUG 00:06:40.843 0 6.0 4.7 7.0 4.5 85.24 0 1 1 11.60 11.66 11.30 11.30 11.06 6.09 415 611
08-AUG 00:06:40.937 0 6.0 4.7 7.0 4.5 85.12 0 1 1 11.60 11.63 11.30 11.30 11.01 6.09 416 611
08-AUG 00:06:41.031 0 6.0 4.7 7.0 4.4 84.99 0 1 1 11.58

 

This is going to be brief. The loss of flame trips are probably due to questionable LVDT feedback calibration, changes in the make-up of the gas fuel supply, fuel nozzle problems, or L.O. problems causing issues with the servo. Anyone feeling the need to make changes to servo current bias values, especially on a unit with a Mark V turbine control system, is also part of the problem. It could also be some combination of all of the above and other factors as well. Just because the two flame detectors indicate loss of flame doesn't mean that other combustors aren't experiencing loss of flame, and monitoring the exhaust spreads will prove that.

You haven't told us where the vibration was being experienced during the prior shutdowns, but when a unit with a reduction gear is decelerating and experiences flame flickering and eventual loss of flame it causes the turbine rotor (the input to the reduction gear) speed to fluctuate and it has a different inertia than the generator rotor (the output of the reduction gear) and this can be the cause of the high vibration being experienced on the load gear.

Fluctuating flame indications and high exhaust temperature spreads on a unit with properly calibrated gas control valve LVDT feedback and properly set gas control valve null bias currents and a properly controlling stop-ratio valve are usually caused by fuel problems or start-up/shutdown fuel setpoints which are very close to being marginal to begin with. Nozzle problems and servo problems (which are almost *always* caused by L.O. problems) can also contribute to problems.

A very quick examination of the horrendous amount of data provided shows the stop-ratio valve was at about 4-5% just prior to loss of flame. That could be an indication of excessively high gas fuel supply pressure which could also be contributing to the problem. Presuming the stop-ratio valve LVDT feedback calibration is good, that's awfully near closed at roughly 65% speed, which could mean the stop-ratio valve is having to go nearly closed to try to perform its function of controlling the gas pressure upstream of the gas control valve.

 

Dear CSA,

Thanks for the advice. Since in the sampled data, the error between the called-for inter-valves pressure and the actual value is minor, may i assume the LVDT feedback and servos are working fine? We are planning to change the cables of the flame detectors, is this going to work?

The high vibration is felt at the coupling bearing between load gear and generator. During normal operation (steady-state) it could achieve 11mm/s peak in a day.

Please enlighten me.

 

Unless the unit is older and you have been experiencing problems with other wiring, or you suspect problems with the flame detector wiring for another reason (such as abnormally high turbine compartment temperatures or something similar), replacing the flame detector wiring is probably not going to resolve your problem.

Have you cleaned the flame detector lenses recently?

You may assume that the Stop-Ratio Valve LVDT and servo are working properly, but it's still quite unusual for the SRV to be very nearly closed (at approximately 4% open) for a reference of 8.4 bar (approximately 123 psi). You didn't say what the supply pressure was during shutdown. What is the supply pressure during normal operation? (By the way, many years ago I learned that when someone assumes something it can make an a&& of u and me (ass-u-me)., and for that reason I don't like to assume very much, especially when troubleshooting.)

From the first response, fluctuating flame indications and high exhaust temperature spreads (you didn't say anything about the exhaust temperature spreads during shutdown and start-up during the flickering flame indications) are usually caused by fuel problems (possibly supply characteristics which have changed over time) or start-up/shutdown fuel setpoints which are very close to being marginal to begin with. That means that the fuel start-up and/or shutdown curves may just have been set very close to the limits of flame stability and just now you are beginning to experience problems.

If the unit is experiencing high exhaust temperature spreads during start-up and shutdown as well as flickering flame indications, there is simply not enough fuel for stable flame. When the unit reaches FSNL, fuel control switches from start-up to droop, and the exhaust temperature spreads and flickering flame indications usually disappear at that time. During shutdown, the unit switches from droop speed control to shutdown control and if there is simply not enough fuel for stable flame, there will be high exhaust temperature spreads and flickering flame indications, and the unit will lose flame prematurely. Most, but not all, GE-design heavy duty gas turbines should be able to run down to about 20% speed on natural gas before flame is extinguished, with no flickering flame indication or high exhaust temperature spreads. This requires some tuning to achieve on some machines.

Many owners/operators buy combustion hardware from many different vendors. Sometimes, fuel nozzles are not very well flow-matched, and can contribute to high exhaust temperature spreads. If you've just recently replaced fuel nozzles and the exhaust temperature spreads are higher than normal during loaded operation, then that could be an indication of flow-matching contributing to problems during start-up and shutdown, also. The problem could be further exacerbated by marginal start-up/shutdown parameters, also.

Look, if the unit is experiencing flickering flame indications and high exhaust temperature spreads during start-up *and* shutdown, there's probably not enough fuel being admitted to ensure stable flame. Unfortunately, there are several versions of start-up and shutdown control which have been used over the product life of Mark V, and it's impossible to say in a forum such as this exactly how to adjust the parameters without being able to see the CSP for the unit. It is recommended that you have someone experienced in tuning start-up and shutdown fuel parameters visit the site and provide some assistance.

As for vibration levels, unless you have reason to suspect faulty sensors, if the turbine control system indicates the unit has high vibration then it probably has a mechanical problem which is contributing to an imbalance which is causing high vibration. Someone experienced with using hand-held equipment can usually quickly determine if the problem can be corrected with a balance "shot" or if there is some other issue needing attention, such as a bearing or oil whip problem. All manner of things can happen during the life of a turbine-generator, including wedges coming loose on the generator rotor, dirt build-up causing problems (filters don't remove all contaminants and if the ambient is humid, air-cooled generators can get pretty dirty even with proper generator air filter maintenance). Another cause of vibration problems is alignment; machines do move and settle over time and periodic alignment checks and adjustments are part of good preventive maintenance practices.

Again, turbines and generators have different inertias, and anyone who stands next to a load gear during deceleration will almost always hear a slight clanking noise during low-speed operation during deceleration. There is back-lash in the load gear mechanism and as the unit decelerates the differing inertias will cause the load gear teeth to move from loaded to unloaded condition quickly and cause a clanking noise. If the unit is experiencing flame instability during shutdown, this can cause the same thing as the turbine shaft is speeding up and slowing down quickly in relation to the generator rotor, and the load gear separates the two. During loaded operation the turbine is always trying to accelerate the generator rotor so the gears are maintained in a loaded condition. The same is true during start-up as the unit is accelerating. During shutdown, the conditions change and can cause higher than normal vibrations, and at very low speeds even the clanking noise at times.

Hope this has been enlightening enough for you.

 

There's one more thing which can contribute to flame flickering and high exhaust temperature spreads during start-up and shutdown, and while you seem to be very sensitive to the topic, I'm going to mention it anyway, and that's Gas Control Valve LVDT feedback calibration.

During initial firing, warm-up and during shutdown, the GCV is set to various position references which are fixed values (very slightly modified by compressor inlet temperature). There is no gas fuel flow-rate reference being compared to gas fuel flow-rate feedback; there is no speed reference compared to actual speed. There's just Control Constant values, slightly biased by temperature-corrected speed.

So, if the Firing FSR Control Constant is set for 13.7%, and the GCV LVDT calibration is slightly off so that when the Mark V thinks the GCV is at 13.7% it's actually at 13.2%, or 12.9%, then the amount of fuel entering the unit will be less than if the valve were actually at 13.7% of stroke. And, if the Control Constant values were marginal to begin with, small errors in calibration can cause larger problems for flame stability.

Similarly, when the unit is in a fired shutdown, the GCV position is just a position reference, so if the Control Constant is set for 10.7% for the speed range the unit is operating in, and the GCV LVDT calibration is such that the GCV is actually at 9.5% or 9.9% or 10.2% when the feedback indicates it's at 10.7%, there will be less fuel entering the unit than if the valve were actually at 10.7%.

When the unit is on droop speed control (or exhaust temperature control), GCV LVDT calibration is practically irrelevant, since turbine speed is being controlled by grid frequency (when on line) and the valve will just open or close in relation to the error between the turbine speed reference and the actual speed (again, there is no gas fuel flow-rate reference being compared to gas fuel flow-rate feedback). But, during firing and shutdown, GCV calibration is much more critical and can cause the kinds of problems you are describing, *especially* if the firing and shutdown Control Constants were marginal to begin with.

Some early Mark V control systems actually used Control Constants for acceleration from firing/warm-up to FSNL, instead of an acceleration speed reference compared to actual acceleration speed rate as newer Mark Vs were programmed to use for acceleration from firing/warm-up to FSNL. So, depending on the unit, if the Control Constants were marginal to begin with and The GCV LVDT calibration isn't very close or fuel characteristics have changed over the years (which does happen!), then flickering flame indications and high exhaust temperature spreads will occur during starting and acceleration.

Would you please describe how you verify the GCV LVDT calibration once you've finished it? What kind of measuring device (dial indicator; machinist's scale; calipers; or ?) do you use when verifying the accuracy of the GCV LVDT calibration? Also, what do you consider to be 100% stroke: full open mechanical stop or something less than that?

Again, if the Control Constant values were marginal to begin with and if the GCV LVDT calibration, especially at the low end of valve stroke, isn't very accurate, or, depending on the Control Constant values is off even by just a small amount, flickering flame indication and high exhaust temperature spreads can occur.