基于交-直-交电压柔性控制的接地故障全消弧技术分析研究  

Analysis and Research on Full Arc Extinguishing Technology of Grounding Fault Based on AC-DC-AC Voltage Flexible Control

作　　者：潘晓娟 关静恩 张春丽 唐伟超 Pan Xiaojuan;Guan Jingen;Zhang Chunli;Tang Weichao(Kunming Branch of Jingsen Design Co.,Ltd.,Kunming 650051,Yunnan Province,China;Yunnan Electric Power Technology Co.,Ltd.,Kunming 650217,Yunnan Province,China;Yunnan Wenshan Electric Power Co.,Ltd.,Wenshan 663000,Yunnan Province,China)

机构地区：[1]景森设计股份有限公司昆明分公司,昆明650051 [2]云南电力技术有限责任公司,昆明650217 [3]云南文山电力股份有限公司,云南文山663000

出　　处：《云南电力技术》2020年第4期20-24,共5页Yunnan Electric Power

摘　　要：本文提出了一种基于交-直-交电压柔性控制的消弧方式,研究了注入电压源前后故障接地电流的等效电路,建立了有源补偿器和移相控制的理论模型和等效电路模型。测量系统三相电压、电流及零序电压,当检测到单相接地故障时,获取此时系统的各个参数,计算变流器应该输出的电压,通过相应的调制算法控制有源补偿器输出相应幅值和相位的电压,对故障接地电流进行全补偿。经理论计算及试验,验证了故障电流全补偿消弧技术的可行性,为配电系统中性点提供了一种柔性接地方法。This paper presents an arc suppression method based on AC-DC-AC voltage flexible control,and studies the equivalent circuit of fault grounding current before and after injecting voltage source.The theoretical model and equivalent circuit model of active compensator and phase shift control are established.Measure the three-phase voltage,current and zero-sequence voltage of the system.When single-phase grounding fault is detected,obtain the parameters of the system and calculate the output voltage of the converter.Through the corresponding modulation algorithm,the active compensator can output the corresponding voltage of amplitude and phase,and the fault grounding current can be fully compensated.Through theoretical calculation and experiment,the feasibility of arc suppression technology with full compensation of fault current is verified.It provides a flexible grounding method for neutral point in distribution system.

关 键 词：全补偿 消弧 单相接地故障 配电网 

分 类 号：TM74[电气工程—电力系统及自动化]