交流电源系统绝缘故障模拟与智能选线技术研究  

Research on Insulation Fault Simulation and Intelligent Line Selection Technology of AC Power Supply System

作　　者：臧谦 李秉宇 杜旭浩 刘杰 ZANG Qian;LI Bingyu;DU Xuhao;LIU Jie(State Grid Hebei Electric Power Research Institute,Shijiazhuang 050021,China)

机构地区：[1]国网河北省电力有限公司电力科学研究院,河北石家庄050021

出　　处：《河北电力技术》2023年第5期51-55,共5页Hebei Electric Power

基　　金：国网河北省电力有限公司科技项目(B704DY220109)。

摘　　要：针对站用交流电源的绝缘接地故障精确辨识较难的问题,研究了基于电弧真型嵌入的交流绝缘接地故障模拟方法,建立了交流电源单相接地故障仿真模型,提出了基于小波分解相时频特征的交流绝缘故障智慧感知辨识方法。在此基础上研制出智慧型交流电源剩余电流监测系统,通过在河北省南部电网某智慧变电站示范应用,验证了系统绝缘故障感知与选线辨识方法的有效性,为智慧变电站交流电源绝缘接地故障监测提供了有效的解决方案。Aiming at the difficulty of insulation grounding fault identification of AC power supply, the AC insulation grounding fault simulation method based on arc true embedding is studied, the single-phase ground fault simulation model is established, and the AC insulation fault intelligent identification method based on phase time-frequency feature extraction of wavelet decomposition is proposed.On this basis, the residual current monitoring system of intelligent AC power supply is developed.Through the demonstration application in a smart substation in Hebei Southern Power Grid, the effectiveness of the system insulation fault perception and line selection identification method is verified.The technology proposed in this paper provides an effective solution for the insulation grounding fault monitoring of AC power supply in smart substation.

关 键 词：站用交流电源 剩余电流 小波分析法 接地故障 智能感知 

分 类 号：TM501.2[电气工程—电器]