基于轮换消弧的配电网单相接地故障柔性调控方法  

Flexible Regulation Method of Single-phase Grounding Fault in Distribution Network Based on Rotating Arc Suppression

作　　者：黄泽钧 郭祺[1] 涂春鸣[1] 侯玉超 姜飞[2] 卢柏桦 HUANG Zejun;GUO Qi;TU Chunming;HOU Yuchao;JIANG Fei;LU Baihua(National Electric Power Conversion and Control Engineering Technology Research Center(Hunan University),Changsha 410082,China;College of Electrical and Information Engineering,Changsha University of Science and Technology,Changsha 410004,China;Electric Power Research Institute of Guangxi Power Grid Co.,Ltd.,Nanning 530023,China)

机构地区：[1]国家电能变换与控制工程技术研究中心(湖南大学),湖南省长沙市410082 [2]长沙理工大学电气与信息工程学院,湖南省长沙市410004 [3]广西电网有限责任公司电力科学研究院,广西壮族自治区南宁市530023

出　　处：《电力系统自动化》2022年第24期152-161,共10页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(52077072);湖南省科技领军人才计划资助项目(2019RS3014)。

摘　　要：针对现有配电网接地消弧装置在进行故障电流全补偿时能量获取困难的问题,提出了一种基于轮换消弧的配电网单相接地故障柔性调控方法。首先,分析了不同单相接地故障工况下,多功能消弧变流器直流侧电容电压的变化规律。在此基础上,对多功能消弧变流器两个非故障相之间轮换消弧的基本原理和能量流动情况进行了详细阐述。其次,推导了轮换周期、切换时间与变流器直流侧电容电压的关系式;对多功能消弧变流器两个非故障相的控制参数进行了合理设计,进而保障两个非故障相直流侧电压的稳定。最后,通过仿真和实验验证了所提轮换消弧方法的正确性和可行性。Aiming at the difficulty of energy acquisition in full fault current compensation of the existing distribution network grounding arc suppression device, a flexible regulation method of single-phase grounding fault in distribution network based on rotating arc suppression is proposed. First, the variation law of the DC-link capacitance voltage of the multi-functional arc suppression converter(MF-ASC) under different single-phase grounding fault conditions is analyzed. On this basis, the basic principle and energy flow of rotating arc suppression with MF-ASC between the two non-fault phases are described in detail.Secondly, the relationship between the rotation period, switching time and the DC-link capacitance voltage of converters is deduced. The control parameters of the two non-fault phases of the MF-ASC are designed reasonably to ensure the stability of the DC-link voltage of the two non-fault phases. Finally, the correctness and feasibility of the proposed rotating arc suppression method are verified by simulation and experiment.

关 键 词：配电网 接地故障 消弧变流器 柔性调控 轮换消弧 

分 类 号：TM862[电气工程—高电压与绝缘技术]