FOUR-PARAMETER TRANSIENT RECOVERY VOLTAGE (TRV) REGULATING CIRCUIT

摘要

Provided is a four-parameter transient recovery voltage (TRV) regulating circuit for an on-off test of a high-voltage alternating-current circuit breaker, the TRV regulating circuit comprises a first RC frequency modulation circuit, a second RC frequency modulation circuit and a time delay capacitor which are connected in parallel; the second RC frequency modulation circuit is used for adjusting the oscillation frequency and amplitude of a TRV waveform after an inflection point of the TRV waveform at the rising stage, and the second RC frequency modulation circuit is connected in series with a nonlinear resistor, when the experimental voltage reaches the voltage corresponding to the inflection point of the TRV waveform, the nonlinear resistor is activated, so that the second RC frequency modulation circuit is in conduction. According to the four-parameter transient recovery voltage (TRV) regulating circuit, the nonlinear resistor is used in the second RC frequency modulation circuit to replace the traditional reactor, the requirements for parameters such as the nominal discharge current and the square wave through-flow capacity of the nonlinear resistor are low, so that the size and the weight of the used nonlinear resistor are only about 1% of the prior reactor.