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
刘宝稳 1万子雄 1曾祥君 2张慧芬 3马宏忠1
作者信息
- 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
- 折叠
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.
Abstract
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Key words
single phase grounding fault/active flexible grounding/decaying DC characteristics/identification of transition resistance/fault line selection引用本文复制引用
基金项目
国家自然科学基金(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(KYCX23_0679)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据