I am working in W501D5A siemens gas turbine, we have faced master trip sequence of trip, followed by simadyn master trip. Can anybody guide how to find what are the causes of trip

 

@Tamizh,

There doesn't seem to be a lot of people with experience with this machine and turbine control system.

If you can provide a description of what was happening before the trip (stable operation; low fuel flow/pressure; unstable grid frequency and/or voltage; exhaust temperature alarms; high or low Lube Oil pressure; high Lube Oil temperature; etc.) we might be able to offer some assistance.

BUT, one thing you should do is look at the alarms which were present BEFORE the trip occurred and WHEN the trip occurred. If you can provide a clear photograph of the alarm printout from that even for the time period listed we might be able to offer more assistance. WHENEVER there is a trip that isn't immediately understood it is CRITICAL to print the alarms from the event OR make a screen capture of the alarm display from the event to use in trying to analyze the event. This is true for ALL control systems, especially turbine control systems.

A lot of recent turbine control systems have a display or displays that list all of the conditions that can trip the machine, and when a trip actually occurs something changes on the display to indicate which condition caused the trip. Does your operator interface have such a display or displays? If so, do you know what condition was indicated as the cause of the trip event?

Personally I've never heard of a simadyn being used to control a turbine, but I'm unfamiliar with Westinghouse machines and the various control systems used to control and protect them. But, there is a lot of experienced people who read these threads on Control.com and can provide some help--given useful information.

Finally, welcome to Control.com! Another good tip for getting timely and concise replies/help is to put a better description in the subject line for the thread. (I think you can edit the Subject line--but I may be wrong.) So, use a good Subject line to describe your problem or question, and provide as much information as you can about what was happening at the time, a list or CLEAR photo of the alarms from the event, and any operating data you have. That's the best way to get a quick and concise response to your request for help or assistance.