配电网短路故障分析及其识别方法研究

摘要

The paper analyzed characteristics of voltage variation of phase voltage and neutral point of single-phase grounding fault and two-phase grounding fault happened with different neutral-grounding ways. It put forward fault identification methods of whole distribution network combining with fault characteristics of three-phase and two-phase short circuit fault. The simulation result showed that the methods have advantages such as less analog parameters, simple judgement rules and quicker calculation with practical value.%分析了在不同中性点接地方式下单相接地和两相短路接地故障的相电压及中性点电压变化特征,结合三相短路和两相短路的故障特征,提出了完整的配电网短路故障识别方法.仿真结果表明,该方法具有采集的模拟量少、判据简单、运算简便的优点,具有一定的实用价值.