Through the research and design in this paper, the grid-connected harmonic current of a three-phase four-wire energy storage inverter can be effectively suppressed. Simulation and experimental verifications were carried out. The following conclusions were obtained. 1.
In the three-phase grid-connected current-source inverters (CSIs), the resonance result from the AC-side CL filter and the quality of the grid-current waveform under the unbalanced and harmonic grid voltage conditions are two issues deserving attention.
In addition, the grid-connected harmonic current and neutral-wire current of a 3L-NPC three-phase four-wire inverter are increased under the action of neutral-wire current backflow, frequency doubling, and fluctuation of the neutral point . There are many studies on harmonic suppression [9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19].
Based on the three-phase four-wire 3L-NPC inverter, this paper proposed a controller design approach for grid-connected harmonic current suppression with PI–repetitive control. Through the research and design in this paper, the grid-connected harmonic current of a three-phase four-wire energy storage inverter can be effectively suppressed.
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Harmonic currents disturb the operation of ac grids with electronically controlled and distributed sources and loads. Harmonic suppression methods in grid-connected inverters …
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The proposed inverter has good stability in a weak grid, and the efficiency of the proposed inverter is 95.98% at rated current, which is 0.81% higher than the traditional GCI, …
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This research introduces an advanced finite control set model predictive current control (FCS-MPCC) specifically tailored for three-phase grid-connected inverters, with a …
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Leakage current is a critical issue that affects non-isolated photovoltaic grid-connected inverter systems. The development and deployment of non-isolated PV inverters …
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When a three-phase four-wire grid-connected energy storage inverter is connected to unbalanced or single-phase loads, a large grid-connected harmonic current is generated …
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The conventional control strategies for grid-connected inverters usually use the Park transformation [38], converting the three-phase AC variables to DC quantities in the d q …
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In the three-phase grid-connected current-source inverters (CSIs), the resonance result from the AC-side CL filter and the quality of the grid-current waveform under the unbalanced and harmonic grid voltage …
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Authors Jiahui Qiu, Bingyi Jin, Qiang Li, Wei Zhang, Hongpeng Liu Abstract This paper examines the control principle and limitations of traditional droop control method based …
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To solve this problem,a selective harmonic current suppression method based on passivity-based control is proposed for three-phase grid-connected inverters in this paper. Firstly,the Euler …
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1 Department of Electrical Engineering and Automation, Dongguan University of Technology, Dongguan, China 2 College of Mechatronics and Control Engineering, Shenzhen …
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1 Department of Electrical Engineering and Automation, Dongguan University of Technology, Dongguan, China 2 College of Mechatronics and Control Engineering, Shenzhen …
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In the three-phase grid-connected current-source inverters (CSIs), the resonance result from the AC-side CL filter and the quality of the grid-current waveform under the …
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