Optimization of the Start-up Strategy for the Governors in Geheyan Hydropower Plant
The start-up of the hydro-turbine generator units in Geheyan Hydropower Plant follows a nine-step procedure.In the dry year of 2022,the No.4 unit in the plant took excessive long start-up time which exceeds the setting value of 40 seconds in the guide vane opening and rotating speed increasing process,resulting in a no-load fault of the governor sys-tem and the shutdown of the unit.The fault is analyzed from various aspects including the servomotor,the mechanical circuit and equipment,and the water head.Targeted solution scheme is proposed accordingly.Then,the feasibility of the scheme is verified through start-up tests.
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