含有限PMU的主动配电网故障定位

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...

FAULT LOCATION OF ACTIVE DISTRIBUTION NETWORK WITH LIMITED PMU

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%.