基于10kV配电网的电压暂降源的定位与识别.pdfVIP

学兔兔 第5l卷 第24期 电测与仪表 V01．51 No．24 2014年 12月25日 Electrical Measurement Instrumentation Dec．25。2014 基于1 0kV配电网的电压暂降源的定位与识别 杨浩 ，李永刚 ，李建文 ，李忠良 (1．华北电力大学，河北保定071003；2．焦作供电公司，河南焦作454000) 摘要：提出了一种基于10kV配电网的电压暂降源定位与识别的方法。利用有限的监测点采集的数据，根据电 压暂降发生时系统中能量的流动变化，判定电压暂降源相对于监测点的位置；从三相电压是否平衡、暂降深度、 有功功率变化和电压总谐波畸变率等方面研究了几种常见电压暂降源的特征；根据各类电压暂降源的特性以 及仿真试验提取相应的特征量并设立判据，从而实现了对线路故障、感应电机启动和变压器投运引起的电压暂 降的识别。 关键词：配电网；电压暂降源；定位；识别 中图分类号：TM93 文献标识码：A 文章编号：1001—1390(2014)24-0001-05 Location and recognition of the voltage sag source based on the lOkV distribution system Yang Hao ，Li Yonggang ，Li Jianwen 1． ， Li Zhongliang (J．North China Electric Power University，Baoding 071003，Hebei，China． 2．State Grid Corporation of Jiaozuo，Jiaozuo 454000，Henan，China) Abstract：Based on the 10kV distribution system，a new method of voltage sag source location and recognition was proposed in this paper．With limited data，the voltage sag source location relative to the monitoring site was deter- mined according to the flow of the energy in the system．The characteristics of several common voltage sag sources were analyzed from such aspects as the balance of three—phase voltage，sag depth，changes of active power and total harmonic distortion of voltage．According to the characteristics of the sources and simulation tests，the criteria for judgment were established SO as to recognize the voltage sag caused by power system short-circuit faults，starting up of the induction motors and energization of power transformers． Key words：distribution system，voltage sag source，location，recognition 0 引 言 压器激磁涌流引起的电压暂降 。 电压暂降(voltage sag)是指供电电压有效值快