基于有源消弧暂态衰减信息的配电网接地故障跟踪检测方法  

Ground Fault Tracking and Detection of Distribution Network Based on Transient Attenuation Information of Active Arc-suppression Process

作　　者：刘宝稳[1] 万子雄 曾祥君[2] 张慧芬[3] 马宏忠[1] LIU Baowen;WAN Zixiong;ZENG Xiangjun;ZHANG Huifen;MA Hongzhong(College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,Jiangsu Province,China;Hunan Province Key Laboratory of Smart Grids Operation and Control(Changsha University of Science and Technology),Changsha 410114,Hunan Province,China;School of Automation and Electrical Engineering,University of Jinan,Jinan 250022,Shandong Province,China)

机构地区：[1]河海大学能源与电气学院,江苏省南京市211100 [2]智能电网运行与控制湖南省重点实验室(长沙理工大学),湖南省长沙市410114 [3]济南大学自动化与电气工程学院,山东省济南市250022

出　　处：《中国电机工程学报》2024年第2期464-475,I0003,共13页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51737002);江苏省自然科学基金面上项目(BK20231460);江苏省研究生科研与实践创新计划项目(KYCX23_0679)。

摘　　要：现有配电网单相接地故障检测技术缺乏消弧过程的故障程度跟踪与选线能力。该文充分利用消弧过程中的暂态信息,建立考虑线路参数不对称的集总参数等效模型,论证消弧过程零序电压衰减直流特征的物理意义,提出考虑快速消弧的配电网故障检测新方法,对于低、高阻接地故障均有较高的检测灵敏度。实际应用中,仅需观测消弧全补偿电流投切过程中零序电压及零序电流波形,即可实现过渡电阻测量、故障程度跟踪与故障选线,具有瞬时性故障实时跟踪、故障检测与故障消弧同步进行的优势,操作简单、易于实现。仿真实验证实了方法的有效性,为配电网故障检测提供了新的理论依据。The existing single-phase grounding fault detection technologies lack the ability of fault degree tracking and line selection during arc suppression process in distribution network.Making full use of the transient information during arc suppression process,the lumped parameter equivalent model considering line parameter asymmetry is established,the physical significance of attenuation characteristics of zero sequence voltage in arc suppression process is demonstrated,and a new fault detection method for distribution network considering fast arc suppression is proposed,which is highly sensitive to the detection of both low and high resistance grounding fault.Fault resistance measurement,fault degree tracking and fault line selection can be realized by observing the waveform of zero sequence voltage and current during the switching process of arc suppression full compensation in actual application.It is easy to operate and complete.The effectiveness of the method is verified by simulation experiments,which provides a new theoretical basis for ground fault detection of distribution network.

关 键 词：单相接地故障 有源柔性接地 衰减直流特征 过渡电阻辨识 故障选线 

分 类 号：TM71[电气工程—电力系统及自动化]