云广直流工程换流变分接开关控制电源回路改进  

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

作　　者：刘茂涛[1] 张志朝[2] 余荣兴[1] 徐攀腾[1] 

机构地区：[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

出　　处：《中国电力》2015年第7期35-38,共4页Electric Power

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。Based on tripping incident caused by tap-changer control soouree 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.

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 

分 类 号：TM721.1[电气工程—电力系统及自动化]