Device for limiting peak value and rate of rise of transient recovery voltage of circuit breaker
A technology of transient recovery voltage and circuit breaker, which is applied in the direction of emergency protection circuit device, circuit device, emergency protection circuit device, etc. for limiting overcurrent/overvoltage, and can solve the problem of inability to limit recovery voltage peak value and circuit breaker transient Problems such as high recovery voltage rise rate and limited limiting effect
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[0023] The schematic diagram of the device for limiting the transient recovery voltage of the circuit breaker proposed by the present invention is as follows figure 2 shown in the dotted box.
[0024] In order to limit the peak value and rising rate of the transient recovery voltage of a typical 750kV system circuit breaker, the capacitance value of the capacitor of the device of the present invention is designed to be 10000pF, and the rated voltage of the arrester is 972kV.
[0025] In order to select the capacitance value of the capacitor, the Power Electronics and Electromagnetic Transient Calculation Program (EMTPE) version 1.0 developed by the Electric Power System Research Institute of the China Electric Power Research Institute was used to calculate the transient recovery of the circuit breaker when a short-circuit fault occurs in the system when different capacitance values are used. The rate of rise of the voltage is shown in Table 2. When the capacitance value is...
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