Dear Everyone,
Our site is a GE 6FA 1x1 with a GE Fitchburg Steam Turbine. The CT uses a DLN 2.0 combustion system. We use a MKV and HMI for controls and interface.
We have had 4 separate runs this summer. The first 2 were successful with little issues. The latter 2 have both resulted in a very similar trip during shutdown for L30SPT High Exhaust Temperature Spread Trip. In the trip alarm summary from our recent trip it appears we received an L30SPA Combustion Trouble alarm 6 seconds prior to the Trip. We have examined the usual things including gas valves, IGVs, fuel pressure, thermocouples and flame detectors and have yet come up short. The SMEs we have submitted our trends and trip summaries to from the previous trip to this one seem to agree the cause was a flameout. I suspect the SMEs upon investigation of this trip will say the same. As yet the root cause has not been identified.
Below is a link to a drop box with the alarm summaries from the MKV HMI. Also below are screenshots of the trip timestamp and a few trends from the trip. If someone could look over this data and offer any advice it would be very much appreciated. Also if any further data may be helpful please request and I will try to obtain as needed.
https://secure.eu.internxt.com/sh/f...49cc0a42de7c7e3e7695477d6ae23031d41721da536ea
Our site is a GE 6FA 1x1 with a GE Fitchburg Steam Turbine. The CT uses a DLN 2.0 combustion system. We use a MKV and HMI for controls and interface.
We have had 4 separate runs this summer. The first 2 were successful with little issues. The latter 2 have both resulted in a very similar trip during shutdown for L30SPT High Exhaust Temperature Spread Trip. In the trip alarm summary from our recent trip it appears we received an L30SPA Combustion Trouble alarm 6 seconds prior to the Trip. We have examined the usual things including gas valves, IGVs, fuel pressure, thermocouples and flame detectors and have yet come up short. The SMEs we have submitted our trends and trip summaries to from the previous trip to this one seem to agree the cause was a flameout. I suspect the SMEs upon investigation of this trip will say the same. As yet the root cause has not been identified.
Below is a link to a drop box with the alarm summaries from the MKV HMI. Also below are screenshots of the trip timestamp and a few trends from the trip. If someone could look over this data and offer any advice it would be very much appreciated. Also if any further data may be helpful please request and I will try to obtain as needed.
https://secure.eu.internxt.com/sh/f...49cc0a42de7c7e3e7695477d6ae23031d41721da536ea