中国电力 ›› 2016, Vol. 49 ›› Issue (6): 78-82.DOI: 10.11930/j.issn.1004-9649.2016.06.078.05

• 电网 • 上一篇    下一篇

舟山多端柔性直流系统在线极隔离试验

华文1,凌卫家2,黄晓明1,裘鹏1,陆翌1,于淼1,卢岑岑1   

  1. 1. 国网浙江省电力公司电力科学研究院,浙江 杭州 310014;
    2. 国网浙江省电力公司,浙江 杭州 310007
  • 收稿日期:2015-10-09 修回日期:2016-06-16 出版日期:2016-06-16 发布日期:2016-06-16
  • 作者简介:华文(1986-),男,浙江杭州人,工程师,从事电力系统分析工作。E-mail: huawenpin@126.com

The Online Isolation Test of Zhoushan Multi-terminal MMC-HVDC System

HUA Wen1, LING Weijia2, HUANG Xiaoming1, QIU Peng1, LU Yi1, YU Miao1, LU Cencen1   

  1. 1. State Grid Zhejiang Electric Power Research Institute, Hangzhou 310014, China;
    2. State Grid Zhejiang Electric Power Company, Hangzhou 310007, China
  • Received:2015-10-09 Revised:2016-06-16 Online:2016-06-16 Published:2016-06-16

摘要: 为了验证舟山多端柔性直流输电系统是否具备在线极隔离功能,从理论和实践两个方面进行了分析。基于模块化多电平换流器(MMC)的拓扑结构及其子模块结构,对MMC在线极隔离过程中的充放电可能性进行了分析,理论上证明了在线极隔离的可行性。为保证安全,现场极隔离试验分为带线路空载加压试验以及端对端试验两个过程。通过舟定换流站的现场试验,证明了舟山多端柔性直流输电系统具备了在线极隔离的功能,在此过程中不会出现危险的过压以及持续的燃弧现象,在线极隔离对现场设备无影响。

关键词: 舟山工程, 多端柔性直流输电系统, 模块化多电平换流器, 极隔离, 现场试验

Abstract: The theoretical and empirical analyses are carried out to verify whether or not the Zhoushan multi-terminal HVDC system has the capability of online isolating. The charging and discharging potential during isolating process is analyzed based on the topology of modular multilevel converter (MMC) and its sub-module, proofing theoretically the feasibility of online isolating. To ensure the safety of the field test, the isolating test was divided into two separate processes, an open line test with submarine cable and a terminal-to-terminal test. The field test at the Zhouding station verified the online isolating capability for the Zhoushan multi-terminal HVDC system and confirmed that the online isolating process neither impacts the field equipment nor results in dangerous overvoltage or sustained arc.

Key words: Zhoushan project, multi-terminal HVDC system, modular multilevel converter (MMC), isolation, field test

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