电压差特征引起电压暂降的故障类型识别  

A fault type detection scheme for voltage sag based on differential-voltage

作　　者：王建波 邵文权[2] 张艳丽 王龙[2] 吉玥[2] 

机构地区：[1]国网陕西省电力公司电力科学研究院,陕西西安710054 [2]西安工程大学电子信息学院,陕西西安710048

出　　处：《西安工程大学学报》2015年第5期617-622,共6页Journal of Xi’an Polytechnic University

基　　金：国网陕西省电力公司电力科学研究院科技资助项目(2014KJ-088)

摘　　要：短路故障是引起电压暂降的主要原因之一,快速准确地判断故障类型有利于实施有效的按相电压暂降补偿措施.以△/Y接线变压器方式的中性点直接接地系统为例,提出一种利用相电压差特征引起电压暂降故障类型识别方案.利用相电压差特征对导致电压暂降的故障类型进行区分并确认故障相,为实施按相电压暂降补偿提供依据。仿真分析结果证明了该方案的正确性和有效性.Short circuit fault is a major cause of voltage sag in power system. Quick and accurate judgment of fault types is helpful to implement the voltage sag compensation based the faulted phase. Taking the transformer with Δ/Y-type grounding mode as an example, a method using phase voltage difference is proposed to identify the fault type on which the phase voltage sag compensation is based. The simulation results show that the discussed method is effective and correct.

关 键 词：电力系统 故障类型 相电压差 电压暂降 

分 类 号：TM727[电气工程—电力系统及自动化]