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(一) 概况湖南沙田(花木桥)水电站是引水式电站,隧洞长4 km多,设有调压井,调压井后压力钢管分3个叉管至3台机组。电站原设计两回110kV出线,分别向湘中、湘南送电,线路故障时允许两台机同时甩负荷。电站建成后曾进行过两台机同时甩负荷试验,可满足厂家规定的最大水压上升≤190mH_2O、转速上升≤145%n_r的要求。第3台机组安装
(I) Overview Hunan Shatian (Huamuqiao) Hydropower Station is a diversion power station with a length of more than 4 km and a surge tank. The pressure pipe after the surge tank is divided into 3 pipes to 3 units. Two 110kV substations were originally designed to send power to Xiangzhong and Shonan respectively, and the two machines were allowed to load simultaneously while the line was faulty. After the completion of the power plant, two load rejection tests have been carried out at the same time to meet the requirements of the manufacturer for the maximum water pressure rise of ≤190mH_2O and the speed increase of ≤145% n_r. 3rd unit installed