电压源换流器型直流输电系统的启动控制  

Start-up Control of VSC Based on HVDC System

作　　者：陈海荣[1] 张静[2] 潘武略[2] 

机构地区：[1]金华职业技术学院,金华321017 [2]浙江大学,杭州310027

出　　处：《高电压技术》2009年第5期1164-1169,共6页High Voltage Engineering

基　　金：浙江省自然科学基金(Y106164)~~

摘　　要：启动控制是VSC-HVDC工程应用中需要解决的一个重要问题。为此,分析了电压源换流器交流侧电压的建立过程,介绍了换流站不同控制方式下启动控制策略的选择原则。为避免电压源换流器在启动时的过电流和过电压问题,提出了采用串联限流电阻与基于直接电流控制的矢量控制器相结合的复合启动策略。最后,在电磁暂态仿真软件PSCAD/EMTDC上构建向无源网络供电的VSC-HVDC两端系统。数字仿真结果验证了所提方案的正确性和有效性。Start-up control is one of the most important issues for the VSC-HVDC. Therefore,voltage establishing process in the ac side of the VSC was analyzed, and selection principle of the start-up control strategy under different control mode was introduced. In order to avoid overcurrent and overvoltage in the process of the start-up, a composite start-up control policy , which combined the limit resistor in serier connection in the ac system with the direct current control based vector control strategy, was proposed. A VSC-HVDC system supplying for passive network was simulated . The results verify the validity of the proposed control approach.

关 键 词：高压直流输电 电压源型换流器 限流电阻 直接电流控制 启动控制 PSCAD/EMTDC 

分 类 号：TM721.1[电气工程—电力系统及自动化]