对于含分布式电源（DG）的主动配电网,基于同步相量测量单元（PMU）的监测信息进行故障分析与处理,从而达到定位目的。首先采用拓扑优化法对PMU进行布点优化配置,同时将系统划分为不同区域。利用PMU监测所得实时潮流和电气量信息,基于功率增量方向原理可初步判断发生故障的区域;其次计算候选故障区域内各条区段发生不同类型故障时,各节点PMU相电流计算值,并与实际短路时的电流测量值相比较,利用区段定位优化模型所得计算误差选出故障区段;最后对于故障区段,利用基于双端相量信息的测距公式得到具体故障位置。仿真基于改进IEEE 33节点配电系统进行了不同位置、不同类型以及不同电源出力控制的短路实验,结果显示在不同短路条件下的系统定位误差均低于1%。
Abstract
As for active electric power distribution with distributed generation, the fault location method based on the monitoring information of phasor measurement unit（PMU） is proposed to analyze the fault process and achieve the goal of location. First, the configuration of PMU is optimized based on the topology optimization method, with the electric power distribution divided into different areas meantime. Then according to the real-time measured voltage and current phasors of PMU, by the principle of power increment direction the fault area can be located. Secondly, calculating the current value of each PMU of corresponding node under different types of faults in each segment of the candidate fault area, after compared with the actual short-circuit current measurement value, the fault segment can be selected based on the calculated error of the locating optimization model. For the fault segment, the double-end phasor information is finally utilized to detect the specific fault location. The simulations of different types of short-circuit at different location and different power output control are conducted under the improved IEEE 33 nodes power distribution system. The results show that the locating error under different short circuit conditions is less than 1%.
关键词
配电网 /
分布式电源 /
同步相量测量单元 /
故障定位 /
拓扑优化法 /
定位优化模型
Key words
electric power network /
distributed generation /
phasor measurement unit /
fault location /
topology optimization /
locating optimization model
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基金
国家重点研发计划（2017YFB0902801）; 安徽省科技攻关项目（1704a0902004）
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