A
Hi all,
We are facing a problem in one of our sites that the generation is getting down to zero from full load while in service without any external commands and the Generator CB is tripping on Reverse power protection. This is not happening on regular basis. Its just happening once in a while. Below are some of the points which require the expert's advice. Please enlighten us:
1. We assume that the above problem might be caused due to the failure of Governor or missing of generator CB input to the governor while in service (loose connection).
2. Governor service engineer has come and is arguing that there is no problem with the governor (Woodward 505E) and the relay is giving nuisance tripping output.
3. But in the relay records it is clearly showing that the power is reversed during all the trips that have happened so far. so this is ruled out.
4. what if Generator CB contact input is lost to the governor while the generation is at maximum and is connected with grid? How governor behaves in this case?
5. We had a turbine trip even during home load operation similar to the above condition i.e without any external trip commands. What if Generator CB contact input is lost under this condition? will it have any impact on governor control?
Please reply with your valuable suggestions.
thanks in advance.
ARK
We are facing a problem in one of our sites that the generation is getting down to zero from full load while in service without any external commands and the Generator CB is tripping on Reverse power protection. This is not happening on regular basis. Its just happening once in a while. Below are some of the points which require the expert's advice. Please enlighten us:
1. We assume that the above problem might be caused due to the failure of Governor or missing of generator CB input to the governor while in service (loose connection).
2. Governor service engineer has come and is arguing that there is no problem with the governor (Woodward 505E) and the relay is giving nuisance tripping output.
3. But in the relay records it is clearly showing that the power is reversed during all the trips that have happened so far. so this is ruled out.
4. what if Generator CB contact input is lost to the governor while the generation is at maximum and is connected with grid? How governor behaves in this case?
5. We had a turbine trip even during home load operation similar to the above condition i.e without any external trip commands. What if Generator CB contact input is lost under this condition? will it have any impact on governor control?
Please reply with your valuable suggestions.
thanks in advance.
ARK