基于六边形变换器的无源滑模控制策略  

Passivity-based Sliding-mode Control Strategy Based on Hexagonal Converter

作　　者：程启明 赖宇生 李剑辉 沈章平 张昕 陈颖 CHENG Qiming;LAI Yusheng;LI Jianhui;SHEN Zhangping;ZHANG Xin;CHEN Ying(Shanghai Key Laboratory of Power Station Automation Technology(Shanghai University of Electric Power),Yangpu District,Shanghai 200090,China)

机构地区：[1]上海市电站自动化技术重点实验室(上海电力大学),上海市杨浦区200090

出　　处：《电网技术》2023年第10期4323-4330,共8页Power System Technology

基　　金：国家自然科学基金项目(61905139)。

摘　　要：六边形变换器(hexagonal converter,Hexverter)应用于海上风电时,由于可再生能源的随机性、系统参数的摄动和自身的非线性特性,采用线性的比例积分微分(proportional-integral-derivative,PID)控制时效果不理想。以非线性的无源控制(passivity-based control,PBC)为基础,分析了Hexverter对象的无源性和稳定性,结合滑模控制(sliding mode control,SMC)来弥补单一使用无源控制的缺点,提出了Hexverter的无源滑模(PBC+SMC)复合控制策略。在MATLAB上搭建了Hexverter的无源滑模控制仿真系统,并模拟了多种不同的工况,通过PBC+SMC、PBC、PID这3种控制策略的仿真结果对比,验证了所提复合控制策略具有较好的稳态和动态性能,相比与其他2种控制策略响应速度更快、鲁棒性更强、谐波含量更低,且在电网不平衡条件下能够根据需求不同实现不同的控制目标。It is not so ideal to apply a hexagonal converter(Hexverter)to offshore wind power when it is controlled by the linear PID control due to its own nonlinear characteristics,the randomness of the renewable energy,and the ingestion of the system parameters.In this paper,based on the non-linear passivity-based control(PBC),the passivity and stability of the Hexverter are analyzed.Combining with the sliding mode control(SMC)to compensate for the shortcomings of using the passivity-based control alone,a passivity-based sliding-mode composite control(PBC+SMC)for the Hexverter is proposed.The Hexverter PBC+SMC simulation system is built on MATLAB,and a variety of different working conditions are simulated.The simulation results of the PBC+the SMC,the PBC,and the PID are compared,which verifies that the proposed composite control strategy has a better steady state and dynamic performance with faster response,stronger robustness,and lower harmonic content compared with the other two control strategies.It can achieve different control objectives under the unbalanced grid conditions according to different requirements.

关 键 词：海上风电 六边形变换器 无源滑模控制 电网不平衡 

分 类 号：TM721[电气工程—电力系统及自动化]