摘要
传统PI双环解耦电流控制的电压源型转换器难以为孤立交流区域提供频率支持,因此需要增加频率控制环节。通过在VSC控制器的有功控制环中增加有功-频率下垂控制,在无功环中增加无功-频率微分控制,设计一种基于本地信号、无需远程通信的双环附加频率控制策略。该控制策略主要通过共享风电场功率裕度实现对AC区域的频率支持,同时通过无功环附加频率控制改善交流区域频率响应暂态性能。在MATLAB/Simulink仿真平台搭建4端柔性高压直流输电系统,验证了双环附加频率控制策略的有效性。
The voltage source converter which based on traditional PI double loop decoupling current control is difficult to provide frequency support for isolated AC region,so it needs to add frequency control link.By adding active-frequency droop control in active control loop of VSC controller in AC area side and reactive-frequency differential control in reactive loop,a dual loop additional frequency control based on local signal and without remote communication is designed.The control strategy can support the frequency of AC area by sharing the power margin of WPP,at the same time,the additional frequency control of reactive power loop is used to improve the transient performance of AC frequency response.A four-terminal VSC-MTDC system is built on MATLAB/Simulink simulation platform to verify the effectiveness of the dual loop additional frequency control strategy.
作者
马岩
潘欢
纳春宁
MA Yan;PAN Huan;NA Chun-ning(School of Physics and Electronic-Electrical Engineering,Ningxia University,Yinchuan 750021,China;Ningxia Key Laboratory of Electrical Energy Security,Yinchuan 750004,China)
出处
《电工电气》
2021年第6期1-7,共7页
Electrotechnics Electric
基金
国家自然科学基金项目(61763040)
第三批宁夏青年科技人才托举工程项目(TJGC2018095)。
