Research on Series-Parallel Integrated Multifunctional Converter with Voltage Quality Adjustment
Tu Chunming1, Li Qing1, Guo Qi1, Gao Jiayuan1, Jiang Fei2
1. National Electric Power Conversion Control Engineering Technology Research Center Hunan University Changsha 410082 China;
2. School of Electrical and Information Engineering Changsha University of Science & Technology Changsha 410004 China
Aiming at the prominent voltage quality problems and the demand for new energy consumption in microgrid, a series-parallel integrated converter, which can realize both voltage quality adjustment and grid-connected power regulation, is proposed, and referred to as multifunctional converter (MFC). Based on the single-phase full-bridge inverter, by constructing and reusing the DC-side capacitor branch, the proposed topology can decouple and independently control the two bridge arms of the inverter, so as to realize the independent control of the output voltage and output current, and realize multiple functions at the same time. According to the grid conditions, it can be divided into two working modes: when the grid voltage is normal, it works in the grid-connected power regulation mode to realize the full utilization of new energy generation; when the grid voltage fluctuates, it works in the power regulation and voltage adjustment mode to realize the regulation of power and the compensation of voltage fluctuation at the same time. In this paper, firstly, conduction state of the circuit in different modes is analyzed in detail, and the circuit model is established to explain its principle; then the control strategy is designed and the steady-state error is analyzed; finally, the correctness and effectiveness of the proposed topology and control method are verified by Simulink simulation and RT-LAB hardware in the loop experiment.
涂春鸣, 李庆, 郭祺, 高家元, 姜飞. 具备电压质量调节能力的串并联一体化多功能变流器[J]. 电工技术学报, 2020, 35(23): 4852-4863.
Tu Chunming, Li Qing, Guo Qi, Gao Jiayuan, Jiang Fei. Research on Series-Parallel Integrated Multifunctional Converter with Voltage Quality Adjustment. Transactions of China Electrotechnical Society, 2020, 35(23): 4852-4863.
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2020, Vol. 35 
