一起安稳装置拒动原因分析及反事故措施

The reason analysis on missing operation of safety stability device and anti-accident measures

东风电厂长期作为贵阳南、北电网的开断点,该厂安稳装置中的东干双回线一线跳闸一线过载策略承担着保护东风发电厂220 kV出线电缆热稳定安全的重要责任。2008年8月29日,东干Ⅱ回故障跳开后,东干Ⅰ回过载,但东风电厂安稳装置却未执行线路过载既定策略。针对事故原因及反事故措施进行了分析和介绍,并对装置相关策略判据提出了建议。

Dongfeng Hydropower Plant has played a role of break point of south power grid and north power grid of Guiyang for ages.In its safety stability device,there is a tactics to treat the 'one line tripping and another line overloading' accident of east main double circuit which is very important for thermal stability and safety of 220kV output cables of Dongfeng Hydropower Plant.In 2008,August 29,the east main circuit No.2 tripped,and then the east main circuit No.1 was overload,but the safety stability device of Dongfeng Hydropower Plant didn't execute the established overload treatment tactics.The reason of the accident and the anti-accident measures were analyzed and introduced,and a proposal about the criterion of relevant tactics for the device was put forward.