Research Of Fault Analysis And Ralay Protection Allocation Of Stand-Alone System

According to features and function requirement of generating unit and power network about reserve-power source in flood prevention of wujiang electric power plant. Associating the requirements of type selecting and layout of low-capacity generating unit and electrical equipment of middle and low-pressure power network, the author designed and determineted a program of electric witing topology, equipment selecting and relay protection allocation modeled and emulated the system using the Power System Analysis Software of Package.According the requirement of relay protection setting calculation and protection allocation of the whole system, the author completed the analysising of short-circuit current ,calculation of related parameters, and fixed value setting of all protecting equipment ,the result of short-circuit curren calculation was saved in data base and the fixed value setting was generated to value list for system operation. The result of actual operation and test indicates that the electric witting topology of reserve-power source in flood prevention of wujiang electric power plant is adaptive, the relay protection allocation and setting calculation is able to meet system demand.