电工技术学报
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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
殷生晶1, 王晓琳1, 张艳1,2
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
Voltage Stabilization Control Strategy of High-Speed Permanent Magnet Synchronous Generator Based on Disturbance Observer Compensation
Yin Shengjing1, Wang Xiaolin1, Zhang Yan1,2
1. School of Automation Nanjing University of Aeronautics and Astronautics Nanjing 211106 China;
2. College of Intelligent Science and Control Engineering Jinling Institute of Technology Nanjing 211169 China
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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,结果表明本文所提的控制策略具有更好的动态性能和抗负载扰动的能力。
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关键词 高速永磁同步发电机扰动观测器二自由度PI稳定性抗扰性    
Abstract:High-speed Permanent Magnet Synchronous Generator (HSPMSG) has the advantages of high power density, small size and light weight, it 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 of them 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 Lyapunov stability theory. Then, for further improving 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 2.5V to 0.2V, and the settling time is reduced from 20ms to 5ms when the load is suddenly changed. The simulation results fully demonstrate that the proposed control method can significantly suppress the voltage fluctuation during load switching, shorten the voltage settling time and improve the dynamic performance of the output voltage. To further highlight the advantages of this control method, an experimental platform for a high-speed permanent magnet synchronous generator system based on the TMS320F28377D is built and a series of experiments are conducted. According to the experimental results, the voltage drop is 11V and the settling time is 110ms when the conventional control method is used, while the voltage drop is reduced from 11V to 3.5V and the settling time is reduced to 42ms with the control method proposed in this paper. The experimental results show that the control strategy proposed in this paper can effectively suppress the voltage fluctuation when the load changes and improve the dynamic performance of the system.
The following conclusions can be drawn from the simulation and experimental results: 1) The disturbance observer based on the improved super-twisting algorithm can observe the change of load disturbance in real time and with high observation accuracy. 2) The control method proposed in this paper can significantly improve the dynamic performance of the system, which can effectively suppress the voltage fluctuation when the load changes and shorten the settling time of the voltage fluctuation.
Key wordsHigh-speed permanent magnet synchronous    disturbance observer    two-degree-of-freedom control    stability    immunity   
    
PACS: TM313  
基金资助: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
通讯作者: 王晓琳 男,1976年生,教授,研究方向为永磁电机,无轴承电机,高速电机的驱动和控制。E-mail:wangxl@nuaa.edu.cn   
作者简介: 殷生晶 男,1993年生,博士研究生,研究方向为高速电机驱动及发电控制技术。E-mail:ysjlx0912@163.com
引用本文:   
殷生晶, 王晓琳, 张艳. 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[J]. 电工技术学报, 0, (): 16-16. Yin Shengjing, Wang Xiaolin, Zhang Yan. Voltage Stabilization Control Strategy of High-Speed Permanent Magnet Synchronous Generator Based on Disturbance Observer Compensation. Transactions of China Electrotechnical Society, 0, (): 16-16.
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https://dgjsxb.ces-transaction.com/CN/10.19595/j.cnki.1000-6753.tces.220717          https://dgjsxb.ces-transaction.com/CN/Y0/V/I/16