一种新型配网接地故障电容电流补偿方法

本文提出了一种不接地配电网接地故障电容电流补偿的新方法。设计一种并联电力电子逆变器,在接地故障模式下,变流器产生与故障电容电流幅值相同、相位相反的电流。通过分析接地故障下电网电流状态,给出了利用电力电子逆变器补偿接地故障电容电流的原理与结构。最后通过仿真进行验证,仿真结果表明,所设计的补偿方法可以实现故障电流完全补偿。

A new capacitive current compensation method for distribution network grounding fault

In this paper,a new method of capacitive current compensation for ground fault in ungrounded distribution network is proposed.A parallel power electronic inverter is designed.In the ground fault mode,the converter generates the current with the same amplitude and opposite phase as the fault capacitance current.By analyzing the current state of the power grid under the ground fault,the principle and structure of compensating the capacitive current of grounding fault with power electronic inverter are given.Finally,the simulation results show that the designed compensation method can realize the full compensation of fault current.