摘要
针对含逆变型分布式电源(Inverter Interfaced Distributed Generation,IIDG)的花瓣型配电网的故障定位问题,文中提出了一种基于电气参数的综合故障定位方法,可用于解决三种不同类型的故障问题。对于两相短路故障,采用基于负序电流相位差的故障线路识别方法;针对单相接地故障,基于零序分量推导出测距方程,并利用区段线路长度约束排除虚假根,准确确定实际故障位置;对于对称故障,利用多线路正序电流的相位和幅值来确定故障位置;利用PSCAD/EMTDC系统对所提出的方法在不同故障情景下进行了故障距离和接地电阻测试。结果表明,与其他方法相比,所提方法定位精度更高,在不同故障类型下的定位误差不超过1%,从而验证了该方法在含IIDG的花瓣型配电网中具有更高的精度和抗故障能力。
In order to solve the fault location problem of the petal-shaped distribution network with inverter interfaced distributed generation(IIDG),a comprehensive fault location method based on electrical parameters is proposed,which can address fault location for three distinct fault types.For two-phase short circuit faults,a fault line identification method utilizing the phase difference of negative sequence current is proposed.For single-phase grounding faults,a distance measurement equation is derived based on zero-sequence components,with the inclusion of section line length constraints to eliminate spurious roots and accurately determine the actual fault location.For symmetrical faults,the fault location is determined by leveraging the phase and magnitude of positive sequence currents across multiple lines.The fault distance and grounding resistance of the proposed method are tested by PSCAD/EMTDC system under different fault scenarios.The results demonstrate that the proposed method achieves higher location accuracy compared to other approaches,with location errors not exceeding 1%for different fault types,thereby confirming the superior precision and fault-tolerant capabilities of the method in petal-shaped distribution networks with IIDG.
作者
顾大德
肖健
韦梦立
陈文志
Gu Dade;Xiao Jian;Wei Mengli;Chen Wenzhi(Guangzhou Power Supply Bureau,Guangdong Power Grid Co.,Ltd.,Guangzhou 510000,China;Southeast University,Nanjing 411110,China;Tunkia Co.,Ltd.,Changsha 336017,China)
出处
《电测与仪表》
北大核心
2023年第11期53-59,共7页
Electrical Measurement & Instrumentation
基金
江苏省自然科学基金资助项目(BK20200824)。
关键词
逆变型分布式电源
花瓣型配电网
故障定位
阻抗法
inverter-interfaced distributed generation
petal-shaped distribution network
fault location
impedance method
作者简介
顾大德(1987-),男,工程师,研究方向为电力系统及其自动化。Email:18024590988@189.cn;肖健(1976-),男,博士研究生,高级工程师,研究方向为电力系统及其自动化。Email:dilly01@163.com;通信作者:韦梦立(1993-),男,博士研究生,研究方向为控制理论与控制工程。Email:weimengli@seu.edu.cn;陈文志(1983-),男,硕士,研究方向为电磁计量。Email:chenwzh@tunkia.com。
