基于预设性能的虚拟同步机自适应滑模反推控制  

Adaptive sliding mode backstepping control of virtual synchronous generator based on prescribed performance

作　　者：孙永豹 王亚超 杨玮林 许德智[1] SUN Yongbao;WANG Yachao;YANG Weilin;XU Dezhi(College of Internet of Things Engineering, Jiangnan University, Wuxi, Jiangsu 214122, China;Metrology Center of State Grid Jibei Electric Power Company, Beijing 100045, China)

机构地区：[1]江南大学物联网工程学院,江苏无锡214122 [2]国网冀北电力有限公司计量中心,北京100045

出　　处：《中国科技论文》2022年第3期319-325,338,共8页China Sciencepaper

基　　金：国家自然科学基金资助项目(61973140,61903158);北京市自然科学基金项目(21JC0026)。

摘　　要：为了改善功率电子逆变器存在的低惯性和欠阻尼特性,以及提升微网系统的稳定性,提出了一种基于虚拟同步机(virtual synchronous generator,VSG)的微网系统控制策略。首先,在传统的功率电子逆变器中引入VSG技术,增加逆变器的虚拟惯性,增强系统的调节能力,并将滑模控制引入到系统的角速度和转矩误差中,起到提升系统鲁棒性的作用。然后,使用参数自适应控制,根据系统状态的变化调整系统的不确定参数,并结合投影算子对参数的范围进行限制;通过引入预设性能控制(prescribed performance control,PPC),对系统的滑模面进行相应的误差转换,以实现期望的滑模面动态响应,限制系统跟踪误差,并通过Lyapunov方程验证所提控制策略的可行性。最后,在MATLAB/Simulink中进行基于VSG的微网系统仿真实验。结果表明,所提控制策略具有较好的抗干扰性能和鲁棒性能。In order to improve the low-inertia and under-damping characteristics of power electronic inverters and enhance the stability of the microgrid system,a microgrid system control strategy based on virtual synchronous generator(VSG)was proposed.Firstly,the VSG technology was introduced into the traditional power electronic inverter to increase the virtual inertia of the inverter and enhance the adjustment ability of the system.It was realized by introducing sliding mode control into the angular velocity and torque error of the system to improve the robustness of the system.Then,the parameter adaptive control was used to adjust the uncertain parameters of the system according to the changes of the system state,and the range of the parameters was limited by the projection operator.By introducing prescribed performance control(PPC),the sliding surface of the system was converted to the corresponding error to achieve the desired dynamic response and limit the tracking error of the system.The feasibility of the proposed control strategy was verified by the Lyapunov equation.Finally,a VSG-based microgrid system simulation experiment was carried out in MATLAB/Simulink.By adjusting the control parameters,the corresponding results show that the proposed control strategy has better anti-interference performance and robust performance.

关 键 词：微网系统 虚拟同步机 滑模控制 参数自适应控制 预设性能控制 

分 类 号：TM31[电气工程—电机]