基于PSCAD的500kV同塔双回输电线路潜供电流和恢复电压的仿真分析

Simulation and analysis of secondary arc current and recovery voltage in 500kV double circuit transmission line based on PSCAD

利用PSCAD对典型500k V同塔双回输电线路建模,通过FAULT模块设置短路故障仿真模拟出了潜供电流和恢复电压波形,从而为重合闸设备的重合时间和相关的继电保护定值相关参数设置提供了依据,并为有效的熄灭线路因静电耦合和电磁耦合产生的二次电弧提供了重要参数。同时深入分析了500k V同塔双回输电线路电抗补偿、短路点位置和土壤电阻率对潜供电流和恢复电压的影响,对500k V同塔双回输变电工程的调试、启动和运行具有一定的指导意义。

A typical model of 500kV double circuit transmission on the same tower is established by PSCAD .The waveform of secondary arc current and recovery voltage are simulated through the short-circuit fault set by FAULT module , which provide not only a basis of the reclosing time of switching equipment and the related parameter relay protection value , but also important parameters of the secondary arc produced by electrostatic coupling and electro -magnetic coupling .At the same time , the impacts of reactance compensation ,fault location and soil resistivity on sec-ondary arc current and recovery voltage are analyzed .Article 500kV with double towers of power transmission and transformation project commissioning , start-up and operation has a certain guiding significance .