摘要
海上风电场的功率输出使得新型直流输电技术成为近期研究热点之一。在分析含VSC的交直流混合输电系统模型后,得出VSC-HVDC直流输电系统的数学模型,并对系统的非线性模型进行了线性化分析,通过运用分散协调控制理论得出系统的最优控制规律,依照此规律设计了VSC-HVDC的非线性控制器。最后使用仿真软件PSCAD/EMTDC,对文中设计的非线性控制器进行了仿真研究。仿真结果表明文中采用的控制策略是有效的,并能改善输电系统的动态性能。
H V D C transmission technology is regarded as one ol the main solutions for grid integration ollarge remote offshore wind farms. The mathematical model of VSC - HVDC can be obtained after analysisthe AC - DC hybrid transmission system model including VSC . Then the nonlinear model of the system waslinearized. And the optimal control law can be concluded by applying the decentralized coordinatedcontrol theory. According to the law the VSC - HVDC nonlinear controllers can be designed. At last thesimulation is carried out using the designed nonlinear controller based on PSCAD / EMTDC . Thesimulation results show that control strategy is effective and can improve the dynamic performance of thetransmission system.
出处
《信息技术》
2016年第7期31-35,共5页
Information Technology
基金
国家自然科学基金项目(51207072)
江苏省大学生实践创新训练计划项目(201510300070)
