中国电力 ›› 2015, Vol. 48 ›› Issue (7): 35-38.DOI: 10.11930.2015.7.35

• 电网-特高压直流输电专栏 • 上一篇    下一篇

云广直流工程换流变分接开关控制电源回路改进

刘茂涛1,张志朝2,余荣兴1,徐攀腾1   

  1. 1. 中国南方电网超高压输电公司广州局,广东 广州 510405;
    2. 中国南方电网超高压输电公司,广东 广州 510620
  • 收稿日期:2015-04-10 出版日期:2015-07-25 发布日期:2015-11-26
  • 作者简介:刘茂涛(1986—),男,福建龙岩人,工程师,从事特高压直流输电系统研究及运行维护工作。E-mail: huanghemaotao@163.com

Improvement Proposal of Converter Transformer Tap-Changer Control Circuit in Yunnan-Guangdong UHVDC Project

LIU Maotao1, ZHANG Zhichao2, YU Rongxing1, XU Panteng1   

  1. 1. GZ Bureau, EHV Power Transmission Company, CSG, Guangzhou 510405, China;2. EHV Power Transmission Company, CSG, Guangzhou 510620, China
  • Received:2015-04-10 Online:2015-07-25 Published:2015-11-26

摘要: 结合云广工程调试期间分接开关控制电源故障导致的跳闸事件,通过梳理分析分接开关控制电源故障逻辑及其功能,指出了当前逻辑存在误闭锁分接开关调整导致同极双阀组不平衡运行的风险,根据电源故障性质及影响范围,提出将分接开关控制电源故障回路进行解耦,通过不同回路传送故障信号的整改建议,确保可靠闭锁或者开放分接开关调整。改进方案已成功应用于新建投产的糯扎渡特高压直流输电工程中,可有效降低同极双阀组不平衡运行的风险。

关键词: 云广直流工程, 有载分接开关, 控制电源故障, 双阀组, 平衡运行

Abstract: Based on tripping incident caused by tap-changer control soource failure during commission of Yunnan-Guangdong HVDC project, control logic and impact of converter source failure are analyzed. The imbalance operationg risk of dual valve groups on same pole caused by incorrect tap changer operation is presented. A decoupled method is proposed to transmit different control signal seperately and to ensure reliable block or allow tap-changer adjustement. The proposed improvement is applied in Nuozhadu UHVDC project and reduced imbalance operation risk.

Key words: Yun-Guang UHVDC project, on-load tap-changer, control voltage fault, dual valve groups, balance operation

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