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Two-Segment High-Performance PV Grid-Connected Inverter
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DOI：10.1109/TPEL.2024.3480994.png)
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摘要
En 中文
In PV grid-connected applications, a grid-connected converter is usually used to connect with the grid to realize dc/ac conversion and power flow control. How to improve the quality of grid-connected current of power equipment so that the harmonic content injected into the grid is as little as possible has become a hot research topic in the field of PV grid-connected applications. By analyzing the causes of grid-connected harmonic currents during the grid-connection process, a two-segment high-performance grid-connected inverter topology is proposed. This structure makes the main inverter basically equal to the grid voltage through the simplest closed-loop control. Since the voltage sensitivity of the auxiliary inverter is low, utilizing the auxiliary inverter for the compensation of grid-connected voltage and grid-connected control of power flow will lead to an improvement in the quality of grid-connected current. A 3.3 kW grid-connected inverter system prototype is fabricated and tested, and the experimental results verify the stability and effectiveness of the theoretical analysis and the proposed control scheme.
Keyword:
Inverters
Power harmonic filters
Harmonic analysis
Voltage control
Active filters
Power system stability
Costs
Switches
Power filters
Frequency control
Harmonic suppression
photovoltaic grid-connected inverter
total harmonic distortion (THD)
voltage sensitivity
期刊
IF:
6.5
论文数:
1.7W
被引数:
8.3W
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