Aiming at the problem that the power quality of the output side of the microgrid main inverter is susceptible to the nonlinear load connected to the AC bus, a high power quality control strategy for three-phase four-wire microgrid main inverter is proposed. Firstly, this paper analyzes the causes of the voltage distortion at the output side of the main inverter caused by the nonlinear load, the voltage harmonic suppression mechanism of main inverter is obtained under the operation of the isolatedmicrogrid. Secondly, the harmonic suppression method of traditional inverter and its physical mechanism are analyzed, and the deficiency of the suppression method is pointed out. Then. a new harmonic suppression strategy based on virtual harmonic impedance is proposed, which can be applied to both the current harmonic source and the voltage harmonic source,andthe feasibility of the method is analyzed. Finally, The simulation and experimental results verify the correctness and practicability of the proposed control strategy. The proposed method effectively improves the quality of the output voltage of the maininverter.
涂春鸣, 杨义, 肖凡, 兰征, 李元涛. 非线性负载下微电网主逆变器输出侧电能质量控制策略[J]. 电工技术学报, 2018, 33(11): 2486-2495.
TuChunming, Yang Yi, Xiao Fan, LanZheng, Li Yuantao. The Output Side Power Quality Control Strategy for MicrogridMain Inverter under Nonlinear Load. Transactions of China Electrotechnical Society, 2018, 33(11): 2486-2495.
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2018, Vol. 33 
