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.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
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)~~
