接地故障下配电网柔性互联系统主动消弧技术研究  

Research on active arc extinguishing technology for flexible distribution network interconnection system under grounding faults

作　　者：杨金东 张锡然 黄春辉 荣飞[2] YANG Jindong;ZHANG Xiran;HUANG Chunhui;RONG Fei(Electric Power Research Institute of Yunnan Power Grid Co.,Ltd.,Kunming 650000,China;College of Electrical and Information Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]云南电网有限责任公司电力科学研究院,云南昆明650000 [2]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《电工电能新技术》2025年第2期55-64,共10页Advanced Technology of Electrical Engineering and Energy

基　　金：南方电网云南电网科技项目(05620020230301PD00004)。

摘　　要：针对无源装置消弧精度低、有源装置消弧成本高的问题,本文提出通过复用配电网柔性互联系统应对配电网单相接地故障。该互联系统由分相组网装置和两个配电网组成,可在电网正常运行期间提升电能质量,改善供电变压器负载率。在单相接地故障发生后,该互联系统断开用于接入故障配电网的非故障相断路器,通过故障相桥臂注入电流的方式实现可靠消弧。本文分析了配电网柔性互联系统在各种配电网运行状态下的控制模式及模式切换的必要性。仿真结果表明,本文所提方法无需额外配置消弧装置即可实现故障消弧,同时保持对非故障配电网的电能质量治理功能,具备优越的消弧效果和经济性。Addressing the problem of low arc-extinguishing accuracy of passive devices and high arc-extinguishing cost of active devices,this paper proposes a flexible distribution network interconnection system to address single-phase ground faults.The system consists of a phase-separated networking device and two power distribution networks,which can improve the power quality and enhance the load rate of power supply transformers during normal operation of the distribution network.Upon occurrence of a single-phase ground fault,the system disconnects the non-fault phase circuit breakers used to access the faulty distribution network,achieving reliable arc extinction by injecting current through the fault phase bridge arm.The control modes of the flexible distribution network interconnection system in various operating states of the distribution network and the necessity of mode switching are analyzed.Simulation results demonstrate that the proposed method can achieve fault arc extinction without the need for additional arc extinction devices,while maintaining the function of regulating the power quality of the non-fault power distribution network,thus exhibiting superior arc extinction effectiveness and cost-effectiveness.

关 键 词：配电网柔性互联系统 单相接地故障 消弧 

分 类 号：TM77[电气工程—电力系统及自动化]