高压直流输电换流变压器分接头调节的死区角度和死区电压分析  

Analysis on Dead-zone Angle and Dead-zone Voltage for Tap Adjustment of HVDC Transmission Converter Transformer

作　　者：卢东斌 李凤祁 姚其新 黄志岭 张庆武 侍乔明 LU Dongbin;LI Fengqi;YAO Qixin;HUANG Zhiling;ZHANG Qingwu(NR Engineering Co.,Ltd.,Nanjing 211102,China;NARI Group Corporation(State Grid Electric Power Research Institute),Nanjing 211106,China;DC Technology Center of State Grid Corporation of China,Beijing 100052,China;DC Company of State Grid Hubei Electric Power Company,Yichang 443000,China)

机构地区：[1]南京南瑞继保工程技术有限公司,江苏省南京市211102 [2]南瑞集团有限公司(国网电力科学研究院有限公司),江苏省南京市211106 [3]国家电网有限公司直流技术中心,北京市100052 [4]国网湖北省电力有限公司直流公司,湖北省宜昌市443000

出　　处：《电力系统自动化》2023年第24期165-174,共10页Automation of Electric Power Systems

基　　金：国家电网有限公司直流技术中心科技项目(SGTYHT/21-JS-223)资助。

摘　　要：高压直流输电系统通过换流器触发角的快速控制来实现功率调节。此外,为了扩大功率调节范围和保持系统处于良好的运行状态,还辅以换流变压器分接头调节。文中从整流侧分析了分接头调节与角度变化及分接头调节与交流电压波动的关系,从逆变侧分析了分接头调节与直流电压及分接头调节与交流电压波动的关系,并提出了分接头调节死区的设置原则,即根据高压直流输电系统所连接实际交流系统的交流电压波动范围,选择合适的换流变压器分接头调节死区角度和死区电压,从而避免分接头往复调节缩短分接开关使用寿命甚至造成损坏,同时避免无功功率和直流电压大幅波动。The high-voltage direct current(HVDC)transmission system realizes the power regulation through rapid control of the triggering angle of converters.In addition,in order to expand the power regulation range and maintain the system in a good operation condition,the tap adjustment of converter transformer is also supplemented.The relationship between tap adjustment and angle change or AC voltage fluctuations from the rectifier side and the relationship between tap adjustment and DC voltage or AC voltage fluctuations from the inverter side are analyzed,respectively.The dead-zone setting principle for tap adjustment is proposed,which is to select an appropriate dead-zone angle or dead-zone voltage of the converter transformer tap based on the AC voltage fluctuation range of the actual AC system connected to the HVDC transmission system,in order to prevent reduced lifespan or even damage of the tap changer caused by tap reciprocating adjustment,and to avoid large fluctuations in reactive power and DC voltage.

关 键 词：高压直流输电系统 换流变压器 分接开关控制 频繁调节 死区角度 死区电压 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM403.4