Abstract
Transient recovery voltage (TRV) is one of inherent characteristics in power system, the peak and rate of rise of TRV are important factors affecting switching course of test circuit breaker. Circuit breakers can fail to interrupt fault current when the power system has TRV characteristics that exceed the rating of the circuit breaker. The paper investigates the transient requirements of 1100kV circuit breakers by ATP simulation calculation mainly for Jindongnan-Nanyang-Jingmen ultra high voltage (UHV) pilot project. This research item includes TRV after circuit breakers interrupt the short-circuit currents or the current in out of phase condition and TRV under different fault types. The investigation was carried out by digital simulation to analyze TRV waveforms. The paper present the detailed setting-up of the digital model of the substation based on the on-site measurement of the substation data. Based on the output, the peak values and rate of rise of the TRV waveforms can be determined. Finally, the paper gives some measures of suppressing TRV, simulates and analyzes suppression effect of MOA on transient recovery voltage.
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