电力系统自动化2017，Vol.41Issue(8)：138-145,8.DOI:10.7500/AEPS20160621001
适应线路参数及负载变化的配电网柔性优化消弧方法
Flexible Arc-suppression Optimization Method for Distribution Network Adaptable to Variation of Line Parameters and Load
摘要
Abstract
Arc extinguishing of grounding faults is a problem for neutral non-effective grounding distribution networks.In consideration of line parameters and load, a flexible arc-suppression optimization method under the single-phase-to-ground fault in the distribution network is proposed.When a single-phase-to-ground fault occurs, the compensation current is injected by a cascaded H-bridge converter.By measuring the zero sequence voltage of the bus, the grounding resistance can be calculated.For the higher grounding resistance, the fault phase is selected according to the variation trend determined of the three-phase voltage on the bus after compensation current injection.Then the voltage in the fault phase is controlled to be zero by adjusting the injection current according to the result of fault phase selection, which means to adopt the voltage-based arc-suppression method.Otherwise, the compensation current will be injected continuously, which means to adopt the current-based arc-suppression method.The simulation result has proved that the proposed method is able to suppress the arc flexibly and effectively and overcome the shortages of current-based and voltage-based arc-suppression methods due to line parameters and load.关键词
配电网/单相接地故障/柔性消弧/电流消弧方法/电压消弧方法/级联H桥变流器Key words
distribution network/single-phase-to-ground fault/flexible arc-suppression/current-based arc-suppression method/voltage-based arc-suppression method/cascaded H-bridge converter引用本文复制引用
郭谋发,游建章,林先辉,杨耿杰,缪希仁..适应线路参数及负载变化的配电网柔性优化消弧方法[J].电力系统自动化,2017,41(8):138-145,8.基金项目
国家自然科学基金资助项目(51677030) （51677030）
福建省自然科学基金资助项目(2016J01218).This work is supported by National Natural Science Foundation of China (No.51677030) and Fujian Provincial Natural Science Foundation of China (No.2016J01218). （2016J01218）
