摘要
为满足自动化和智能化配电网的要求,提出故障指示器+PMU装置信息的配电网故障定位方法。该方法基于配电网拓扑结构和故障指示器状态,能快速、准确、可靠地定位故障线路区段。考虑故障后电流流向和故障指示器状态,以快速确定故障位置。然后在待分析的故障线路区段内,结合区段拓扑结构和DG系统位置信息,运用等效戴维南定理将区段两端的系统合理等效,以简化问题。根据线路区段类型,采用网络序分量模型和阻抗法来实现精确故障定位。研究结果表明,经过二次定位修正后,定位精度得到明显提升,误差率在10%以内。
In order to meet the requirements of automation and intelligent distribution networks,a distribution network fault location method based on fault indicator and PMU device information is proposed.This method is based on the topology structure of the distribution network and the status of fault indicators,and can quickly,accurately,and reliably locate faulty line sections.The current flow direction and fault indicator status are considered to quickly determine the fault location.Then,within the faulty line section to be analyzed,combined with the topology structure of the section and the location information of the DG system,the equivalent Thevenin theorem principle of circuit theory is applied to reasonably equivalent the systems at both ends of the section to simplify the problem.According to the type of line section,the network sequence component model and impedance method are used to achieve precise fault location.The research results indicate that after secondary positioning correction,the location accuracy has been significantly improved,with an error rate of less than 10%.
作者
赵广旭
黄小燕
ZHAO Guangxu;HUANG Xiaoyan(Xuchang Kaipu Testing and Research Institute Co.,Ltd.,Xuchang 461000,China;Xuji Electric Co.,Ltd.,Xuchang 461000,China)
出处
《电工技术》
2024年第13期53-56,共4页
Electric Engineering
关键词
故障指示器
PMU装置信息
配电网
故障定位
fault indicator
PMU device information
distribution network
fault location
