基于扰动观测器补偿的高速永磁同步发电机稳压控制策略  

Voltage Stabilization Control Strategy of High-Speed Permanent Magnet Synchronous Generator Based on Disturbance Observer Compensation

作　　者：殷生晶 王晓琳[1] 张艳 Yin Shengjing;Wang Xiaolin;Zhang Yan(School of Automation Nanjing University of Aeronautics and Astronautics Nanjing,211106,China;College of Intelligent Science and Control Engineering Jinling Institute of Technology Nanjing,211169,China)

机构地区：[1]南京航空航天大学自动化学院,南京211106 [2]金陵科技学院智能科学与控制工程学院,南京211169

出　　处：《电工技术学报》2023年第14期3800-3811,共12页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(52177048);江苏省自然科学基金(BK20201297);江苏省高等学校基础科学基金(21KJB120003)资助项目。

摘　　要：为解决高速永磁同步发电机系统在传统双闭环控制下,负载变化时输出电压波动大、动态响应慢等问题,提出一种基于扰动观测器补偿的稳压控制方法。首先,将负载电流视为系统扰动,设计基于改进超螺旋算法的扰动观测器,并通过Lyapunov稳定理论证明了其稳定性;其次,设计二自由度PI电压外环控制器,并将扰动量前馈至电压外环的输出端,以提高输出电压对负载变化的抗扰能力;最后,基于一台高速永磁同步发电机进行了仿真与实验验证,并与传统双闭环控制进行了比较,结果表明,该文所提的控制策略具有更好的动态性能和抗负载扰动能力。High-speed permanent magnet synchronous generator(HSPMSG)has the advantages of high power density,small size,and lightweight,and is widely used in many applications.However,the conventional double closed-loop control has poor control performance as the output voltage fluctuates with the change of load,which is difficult to meet high-performance applications.For the above problems,some advanced control methods have been proposed,but most have limited ability to suppress load disturbances.In order to improve the ability of the system to resist load disturbance,this paper proposes a voltage stabilization control method based on the disturbance observer compensation.Firstly,a dynamic mathematical model of the permanent magnet synchronous generator system is established.Secondly,considering the influence of load changes on voltage stability,this paper considers the load current as a system disturbance,and a disturbance observer based on the super-twisting algorithm is designed.To improve the response speed of the disturbance observer,the super-twisting algorithm is improved,and its stability is demonstrated by the Lyapunov stability theory.Then,to further improve the tracking and immunity of the conventional PI controller,a two-degree-of-freedom voltage loop PI controller is designed,and its control parameters are analyzed.Finally,the load current observed by the disturbance observer is converted and feedback to the output of the voltage loop so that fluctuations in the DC-side voltage during load changes can be suppressed.The system stability is analyzed by frequency domain analysis,and the results show that with load current feedforward,the disturbance of the system by the load current can be effectively suppressed.To verify the correctness and effectiveness of the proposed control method,simulations and experiments are carried out based on a HSPMSG.The simulation results show that the voltage fluctuation is reduced from 2.5 V to 0.2 V,and the settling time is reduced from 20 ms to 5 ms when the load is suddenly cha

关 键 词：高速永磁同步发电机 扰动观测器 二自由度控制 稳定性 抗扰性 

分 类 号：TM313[电气工程—电机]