M
We are having two Frame 9E turbines with MK-VIe control system. During winter season, whenever temperature goes at its lowest point (around 3 to 5 DegC) specially in the night around 0300 to 0800 hrs this alarm appear on the Alarm server then we switch to liquid Fuel screen to check the "fqrout" and "fql1" values. These values are disturbed too. The value of "fqrout" goes gradually up to 100% while the value of "fql1" stays where it was. Suppose previously both have same values like 73.05%, then suddenly the value of fqrout start increasing up to approx. 100%, but fql1 stays around 73.00% and no any major change was observed.
Before this problem arise we are running at Base load (approx. 112MW) but when this problem arise we reduce the load 5 or 10 MW and it was stable again. We don't know where the problem is because during last week offline water wash we stocked VC3 and its operation was normal. We have Liquid Fuel Bypass valve manufactured of Fisher Company without LVDTs. Please suggest the cause of this problem.
Thanks and Regards,
Sindhu
Before this problem arise we are running at Base load (approx. 112MW) but when this problem arise we reduce the load 5 or 10 MW and it was stable again. We don't know where the problem is because during last week offline water wash we stocked VC3 and its operation was normal. We have Liquid Fuel Bypass valve manufactured of Fisher Company without LVDTs. Please suggest the cause of this problem.
Thanks and Regards,
Sindhu