一种背靠背直流输电系统换流变压器分接开关控制  

A New Tap Changer Control Method for Inverter Transformer of Back-to-back DC Transmission System

作　　者：王明新[1] 呙虎[1] 

机构地区：[1]中国电力科学研究院,北京市100192

出　　处：《电力系统自动化》2010年第6期61-64,78,共5页Automation of Electric Power Systems

摘　　要：通过对灵宝背靠背直流扩建工程的仿真试验,分析比较了中国已投运的两端直流输电系统和背靠背直流输电系统的分接开关控制,在此基础上提出了一种新的背靠背直流系统逆变侧换流变压器分接开关控制方式,即理想空载直流电压参考值随直流电流变化而变化,既保证直流电压恒定,又使关断角尽可能小。仿真试验验证了这种新的分接开关控制方式是可行的。From the simulation test of Lingbao back-to-back DC transmission expanding project, the tap changer control of twoterminal DC transmission system and back-to-back DC transmission system, which have been put into operation in China, is analyzed and compared. On this basis, a new tap changer control method for inverter transformer of back-to-back DC system is proposed. And the principle of the method is that the reference of ideal no-load DC voltage varying with the DC current, so as to keep the DC voltage constant and make the extinction angle as small as possible. The feasibility of this new tap changer control method is proved by the simulation test of Lingbao back-to back DC transmission expanding project.

关 键 词：背靠背直流输电系统 分接开关控制 仿真试验 

分 类 号：TM721.1[电气工程—电力系统及自动化]