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摘要
In view of the problem of over-voltage during interrupting shunt reactor by vacuum circuit breaker, the simulation and calculation model of interrupting shunt reactor by vacuum circuit breaker is set up in ATP on the basis of Helmer J's vacuum circuit breaker simulation model and in combination with interphase coupling of circuit breaker, the stray capacitance and loss across open contacts of the circuit breakers. The test verification is performed by setting up the test platform in the fault site. The influence of the the exit voltage of reactor which is controlled by AVC, operation and maintenance method of PT, length and type of cable on the over-voltage at the head end of reactor and of the station transformer are simulated and studied. The research results show that the influence of the exit voltage of the AVC-controlled reactor on the over-voltage is not obvious. While, the influence of operation mode of PT and type of cable on the over-voltage is larger. With the increase of the length of cable, the over-voltage amplitude gradually decreases and tends to ease. ? 2022, Xi'an High Voltage Apparatus Research Institute Co., Ltd. All right reserved.
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