| 摘要 |
PURPOSE:To prevent turbine trip in such a way that opening degree of a turbine load control valve is controlled through cooling water reduction signals at the time of reducing cooling water supply to a condenser so that its steam rate can be balanced with condensing treatment capability of the condenser. CONSTITUTION:when sea water pumps 17a, 17b are tripped or when pump outlet ports 19a, 19b are closed, cooling water reduction signals S1-S4 generated in respective signal generators 23a, 23b, 24a, 24b are input into a turbine load controller 22. For example, in the event that one pump 17a out of the arranged two the sea water pumps is tripped, opening degree of a turbine load control valve 3 is controlled so that the trip signal S1 is applied as input, and the rate of steam flowing into the high pressure turbine 2 may be equivalent to the turbine load to be balanced with the steam treatment capability of the pump 17b which is not tripped. Thus, turbine trip due to a turbine load increase can be prevented, and working rate in the power plant can be improved. |
