基于滤波箱自适应扫频法的容性电流测试研究

Analysis of capacitive current measurement based on filter box adaptive sweep method

消弧线圈动作通常会引起中压配网供电电压异常波动,准确的容性电流测试时实现精确补偿的前提。基于在电压互感器二次侧注入变频电流信号测试法,消除了对消弧线圈电感值的试探性调整环节,无需测量其它任何参数,将测量回路从高压侧转移至低压侧,实现了测量的安全与方便。此方法适用于任何类型的消弧线圈,测量过程可在系统正常运行时进行,该过程无需启动消弧线圈调协机制,有利于调谐装置的正常运行。

Arc suppression coil action usually causes abnormal fluctuation of power supply voltage of medium voltage distribution network.Based on the test method of frequency conversion current signal injected into the secondary side of the voltage transformer,the exploratory adjustment of the inductance of the arc suppression coil is eliminated,and no other parameters are needed to be measured.The measurement circuit is transferred from the high voltage side to the low voltage side,thus achieving the safety and convenience of measurement.This method is suitable for any type of arc suppression coil,and the measurement process can be carried out when the system is in normal operation.