A Multiple Loops Control Strategy Based on DC Link Voltage of Current Source PWM Rectifiers

被引：0
|
作者：
Guo Q. [1 ]
Zhou C. [1 ]
Li S. [1 ]
机构：
[1] Chongqing Energy Internet Engineering Technology Research Center, Chongqing University of Technology, Chongqing
来源：
Diangong Jishu Xuebao/Transactions of China Electrotechnical Society | 2022年 / 37卷 / 08期
关键词：
Active damping; Controller design; Current source rectifier; Multiple loops; Power factor compensation;
D O I：
10.19595/j.cnki.1000-6753.tces.210274
中图分类号：
学科分类号：
摘要：
When the three-phase current source PWM rectifier is employed as the active front-end in low-voltage DC distribution systems, the difficulty and complexity of the control system increase due to the existence of input LC filter and DC bus capacitor. Firstly, a voltage-oriented mathematical model is established in the synchronous rotating reference frame. A compensation scheme of capacitance current based on phasor method is proposed, which guarantees that only by capacitor-voltage feedforward path the input power factor can be kept at unity. Secondly, as an alternative damping method, the capacitor-voltage feedback is used to suppress the LC resonance, and the influence of the feedback gains on the stability of the system is discussed. Furthermore, the system's dynamic performance is further improved by adopting DC-side inductor-current feedback and damping factor. The active power and reactive power of the system are controlled independently by d-axis and q-axis components of the grid side current. The control loops are analyzed using the frequency-response method and the root locus analysis, and supported with Matlab/SISOTOOL, the zero position and loop gains of the controllers are straightforward designed in the z-domain. Finally, the simulation and experimental results verify the feasibility and effectiveness of the proposed method. © 2022, Electrical Technology Press Co. Ltd. All right reserved.
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页码：2051 / 2063
页数：12
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