利用高速响应可控消弧线圈测量配网电容电流

The Measurement of Capacitive Current in Distribution Networks Using Controllable Arc-extinguishing Coil with High Speed Response

在用晶闸管高速控制的消弧线圈电路中 ,可用“远离谐振法”测量配网电容电流 ,为此需要平滑地调节控制角 ,以使中性点位移电压达到不对称电压的 4～ 5倍。为了得到精确的计算结果 ,还需引入考虑谐波电流影响的修正系数 ,推导出了后者的计算公式和列出了相应的曲线。

In the circuit of arc extinguishing coil controlled with high speed response by bipolar thyristors, the capacitive current of distribution networks can be measured with so called “far from resonance” method, for this it is necessary to regulate the displacement voltage to 4~5 times of unsymmetry voltage. This paper shows also that for obtaining the correct result the influence of harmonic currents must be considered by introducing the correction coefficients, this paper presents the formulae and also the curve for determining the correction coefficients.