Sliding mode proportional integral resonance control for single-phase five-level pulse rectifier

doi:10.3785/j.issn.1008-973X.2020.08.017

Journal of ZheJiang University (Engineering Science)

2020, Vol. 54

Issue (8): 1578-1586 DOI: 10.3785/j.issn.1008-973X.2020.08.017

Sliding mode proportional integral resonance control for single-phase five-level pulse rectifier

Yi-feng ZHU(

),Dang-jian WU,Bing-yang BAI,Hao YUE

School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454000, China

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Abstract

A novel single-phase five-level pulse width modulation (PWM) rectifier based on coupled inductor was presented. A sliding mode proportional integral resonance (PIR) control algorithm was proposed to improve the dynamic response of the system, maintain unity power factor and reduce the current harmonic content of the grid side. The circuit topology and working principle of the new single-phase five-level PWM rectifier were analyzed. A mathematical model of the rectifier in the d-q axis synchronous rotating reference frame were constructed. The voltage outer loop sliding-mode and current inner loop PIR control algorithm were derived, and the specific design process was given. Compared with the traditional proportional integral (PI) current control algorithm in the d-q coordinate system, the proposed sliding mode PIR control algorithm has a faster dynamic response speed and a lower current harmonic content on the grid side. A simulation model based on MATLAB/Simulink and a hardware-in-the-loop real-time simulation experiment platform based on RT-lab were built. The sliding mode PIR and traditional PI current control algorithm in the d-q coordinate system were compared and verified in computer simulation and hardware-in-loop experimental test. Simulation and experimental results verify the correctness and feasibility of the proposed algorithm.

Key words： single phase five-level pulse width modulation (PWM) rectifier sliding mode control proportional-integral-resonance coupled inductor

Received: 10 July 2019 Published: 28 August 2020

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Cite this article:

Yi-feng ZHU,Dang-jian WU,Bing-yang BAI,Hao YUE. Sliding mode proportional integral resonance control for single-phase five-level pulse rectifier. Journal of ZheJiang University (Engineering Science), 2020, 54(8): 1578-1586.

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http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2020.08.017 OR http://www.zjujournals.com/eng/Y2020/V54/I8/1578

单相五电平脉冲整流器滑模比例积分谐振控制

以基于耦合电感的新型单相五电平脉冲宽度调制（PWM）整流器为研究对象，为了提升系统动态响应、维持单位功率因数、减少网侧电流谐波含量，提出滑模比例积分谐振（PIR）控制算法. 通过对新型单相五电平PWM整流器的电路拓扑和工作原理分析，构建整流器d-q同步旋转坐标系下的数学模型，推导整流器电压外环滑模和电流内环PIR控制算法，给出具体设计过程. 与d-q坐标系传统比例积分（PI）电流控制算法相比，所提滑模PIR控制算法动态响应速度更快，网侧电流谐波含量更低. 搭建基于MATLAB/Simulink的仿真模型和基于RT-lab的半实物实时仿真平台，对滑模PIR控制算法与d-q坐标系传统PI电流控制算法分别进行计算机仿真和半实物实验对比研究，仿真和实验结果验证了所提滑模PIR控制算法的正确性和可行性.

关键词： 单相, 五电平, 脉冲宽度调制（PWM）整流器, 滑模控制, 比例积分谐振, 耦合电感

Fig.1 New single-phase five-level PWM rectifier topology

Tab.1 Switch status of new single-phase five-level PWM rectifier

Fig.2 Bode diagram of resonant controller and quasi-resonant controller

Fig.3 PIR control diagram of current inner loop

Fig.4 Block diagram of sliding mode PIR control system of new five-level PWM rectifier

Tab.2 Simulation parameters of single-phase five-level rectifier system

Fig.5 Simulation waveforms of line voltage and line current in steady state

Fig.6 FFT analysis result of line current in steady state

Fig.7 Simulation waveforms ofd-axis andq-axis currents in sudden load change condition

Fig.8 Simulation waveforms of output DC voltage under condition of startup and sudden load change of new single-phase five-level rectifier system

Fig.9 Semi-physical experiment system of new single-phase five-level PWM rectifier

Fig.10 Experimental waveforms of main voltage and line current in steady state

Fig.11 Experimental waveforms of input voltage in steady state

Fig.12 Experimental waveforms of DC-link voltage and line current in sudden load change condition


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