Mvar swings

E

Thread Starter

eric enquist

We have two 25mw Ge hydros separated by two bank transformers. For about a week now our mvars have been spiking to around +4 and down t -2 for no apparent reason. Our setpoint is at 1.5 and doesn't seem to be grid related while comparing to the other units data. The field voltage, terminal voltage and bus voltage are all seeing the spikes. The exciter is a Westinghouse mgr with a PSS installed.
 
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