配合防孤岛保护的配电网时限自适应重合闸方法  

Time-limited Adaptive Reclosing Method for Distribution Networks in Coordination with Anti-islanding Protection

作　　者：武岳 范开俊 徐丙垠[1,2] 曹金铭 陈羽 WU Yue;FAN Kaijun;XU Bingyin;CAO Jinming;CHEN Yu(College of Electrical and Electronic Engineering,Shandong University of Technology,Zibo 255000,China;Shandong Kehui Electric Automation Co.,Ltd.,Zibo 255000,China)

机构地区：[1]山东理工大学电气与电子工程学院,山东省淄博市255000 [2]山东科汇电力自动化股份有限公司,山东省淄博市255000

出　　处：《电力系统自动化》2024年第3期122-132,共11页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(52077221)。

摘　　要：有源配电网重合闸之前分布式能源必须脱网,但实际中很多变电站内未安装线路侧电压互感器,导致检无压重合闸方案无法实施。文中提出一种与分布式电源防孤岛保护相配合的时限自适应重合闸方法,通过保护跳闸前的系统侧母线电压来推断线路接入的分布式电源防孤岛保护动作时间,自动调整配电线路重合闸的动作时间,实现重合闸与防孤岛保护的时序配合。所提方法不需要安装线路侧电压互感器,不依赖于通信网络,考虑分布式电源低电压穿越要求的同时实现配电线路的快速重合闸,为电力系统运行的稳定性与供电可靠性提供支撑。仿真及实验结果均验证了该方法的有效性。Before the active distribution network reclosing,the distributed energy resource(DER)must be disconnected from the grid.However,in practice,many substations do not have line-side voltage transformers installed,resulting in the inability to implement a voltage-free reclosing scheme.This paper proposes a time-limited adaptive reclosing method in coordination with DER anti-islanding protection.The operation time of DER anti-islanding protection connected to the line is inferred by the systemside bus voltage before the protection trip,and the operation time of distribution line reclosing is automatically adjusted to achieve the timing coordination of reclosing and anti-islanding protection.The proposed method does not require the installation of line-side voltage transformers and does not rely on communication networks.It considers the requirements of low voltage ride-through of DERs while achieving fast reclosing of distribution lines,providing support for the stability of power system operation and power supply reliability.The effectiveness of this method has been verified by simulation and experimental results.

关 键 词：配电网 分布式能源 低电压穿越 重合闸 防孤岛保护 

分 类 号：TM762.2[电气工程—电力系统及自动化]