模块化多电平直流融冰装置过电压分析及其绝缘配合研究  

Overvoltage and Insulation Coordination of DC Ice-Melting Equipment Based on Modular Multilevel Converter

作　　者：班国邦 杨旗 吕黔苏 熊岩 邹雕 牛唯 BAN Guobang;YANG Qi;U Qiansu;XIONG Yan;ZOU Diao;NIU Wei(Electric Power Research Institute of Guizhou Power Grid Co.,Ltd.,Guiyang 550002,China;Key Laboratory of Ice Prevention&Disaster Reducing of China Southern Power Grid Co.,Ltd.,Guiyang 550002,China;Electric Power Research Institute,China Southern Power Grid Co.,Ltd.,Guangzhou 510080,China)

机构地区：[1]贵州电网有限公司电力科学研究院,贵阳550002 [2]南方电网公司防冰减灾重点实验室,贵阳550002 [3]南方电网科学研究院,广州510080

出　　处：《电瓷避雷器》2023年第2期78-84,共7页Insulators and Surge Arresters

基　　金：国家自然科学基金(编号:52067004);贵州电网公司科技项目(编号:GZKJXM20182104)。

摘　　要：模块化多电平直流融冰装置因其谐波小、无功补偿切换简单等优势逐渐成为电网融冰发展新方向,而装置的过电压分析及其绝缘配合也成为工程应用安全运行的关键技术之一。本研究首先以贵州某110 kV变电站系统参数及其新建模块化多电平直流融冰装置拓扑结构为研究对象,在PSCAD/EMTDC电磁暂态仿真软件中建立融冰装置的仿真计算模型。其次结合绝缘配合标准探索了融冰装置交流侧与直流侧的避雷器选型方案。最后通过对开展交流侧与直流侧的接地故障仿真及直流侧断线故障仿真并得到各种情况下过电压,验证了选型的正确性,并确立了融冰装置绝缘水平选取依据。DC ice-melting equipment based on modular multilevel converter has gradually become a new direction for the development of ice-melting devices in power grid due to its advantages such as low har-monics and simple switching process in reactive power compensation.The over-voltage analysis of ice-melting device and its insulation coordination have also become one of the key technologies for engi-neering applications.Firstly,a simulation model of the ice-melting device in PSCAD/EMTDC electro-magnetic transient simulation software is constructed by taking the system parameters of a l10 kV substa-tion in Guizhou province and its newly-built DC ice melting device topology as the research object.Se condly,the selection scheme of lightning arrester on the AC side and DC side of the ice melting device is explored based on the insulation coordination standard.Finally,the feasibility of insulation coordination is verified and the selection of insulation level for ice-melting device by carrying out the ground fault simulation on AC/DC side and the disconnection fault simulation on the DC side.

关 键 词：模块化多电平 直流融冰装置 过电压 绝缘配合 仿真计算 

分 类 号：TM752[电气工程—电力系统及自动化]