基于定量反馈理论的电压源换流器高压直流输电系统鲁棒控制器  

Robust Controller of Voltage Source Converter-High Voltage Direct Current System Based on the Theory of Quantitative Feedback Theory

作　　者：钱甜甜[1] 苗世洪[1] 冉晓洪[1] 吴英杰[1] Qian Tiantian Miao Shihong Ran Xiaohong Wu Yingjie(State Key Laboratory of Advanced Electromagnetic Engineering and TechnologyHuazhong University of Science and Technology Wuhan 430074 Chin)

机构地区：[1]强电磁工程与新技术国家重点实验室(华中科技大学),武汉430074

出　　处：《电工技术学报》2016年第22期213-222,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(51377068)

摘　　要：PI控制是基于电压源换流器高压直流输电(VSC-HVDC)系统控制器的主流,但面对系统的不确定性时,PI控制器表现出较弱的运行性能。针对这一问题,在传统矢量控制策略的基础上,结合定量反馈理论,提出了一种新的鲁棒控制策略。该策略在设计中可以考虑相位信息,直观地权衡控制器复杂性与性能指标,设计方法简单,易于工程人员现场调节和操作。在不同的运行条件下,用PSCAD软件对控制系统进行了仿真,并与PI控制器下的系统性能进行对比。仿真结果表明,所设计的控制器具有良好的鲁棒性和动态性。PI controllers are still the mainstream in VSC-HVDC system. However, PI controllersshow the weak performance when suffering from the uncertainty in the system. On the basis of thetraditional vector control strategy, this paper combines the quantitative feedback theory （QFT） topropose a new robust control strategy. This strategy can consider the phase information, intuitivelyweigh controller complexity and performance index in the design. It is easy to design and is convenientfor on-site adjustment and operation. Under different operating conditions, simulations on controlsystem are conducted using PSCAD software. The performance of the system with QFT controllers andthe same system with PI controllers is compared. The results show that the proposed controllers havegood robustness and dynamics.

关 键 词：电压源换流器高压直流输电 鲁棒控制 工程实用性 定量反馈理论 

分 类 号：TM72[电气工程—电力系统及自动化]