On the Comprehensive Protection Strategies for the Auxiliary Power System in Core Peak Shaving and Frequency Regulation Hydropower Stations
Large-scale core peak shaving and frequency regulation hydropower stations are usually located in remote are-as with harsh environments,resulting in high probability of failure and high difficulty in protection,which seriously af-fects the safe and stable operation of the generator units and the power grids.In Shuibuya Hydropower Station,three ma-jor strategies for the comprehensive protection of the auxiliary power system are proposed,including the selection of the auxiliary power supply points and optimization of the operation mode,the graded protection for different voltage levels,and the online elimination of auxiliary power faults under abnormal conditions.The effectiveness of the proposed protec-tion strategies is proved by practical operation and maintenance of years.Also,some noticeable issues in the formulation and execution of the strategies are discussed.It can be useful reference for the safe operation,maintenance and manage-ment of the auxiliary power system in large and medium size peak shaving and frequency regulation hydropower stations.
hydropower stationauxiliary power protectioncomprehensive protection strategy
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