DC-DC Converter for DC Grid-Connected Photovoltaic Power Generation Systems

Xiangyang REN; Pan ZHOU; Chaobo DAI

doi:10.16513/j.2096-2185.DE.2003008

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Distributed Energy ›› 2020, Vol. 5 ›› Issue (2) : 27-34. DOI: 10.16513/j.2096-2185.DE.2003008

Basic Research

DC-DC Converter for DC Grid-Connected Photovoltaic Power Generation Systems

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Abstract

As the representative of the renewable energy, the future of wind power and photovoltaic power generation will get a large-scale promotion and application due to the national policy. Distributed new energy local consumption will become an important feature of the future distribution network. In the future distribution network, the new type of load, such as variable frequency electric appliance, electric vehicle charging station, data center and new electronic terminal, are emerging, and the load type tends to be diversified. Therefore, the photovoltaic power generation boost accessing to the DC power grid is an important direction in future. The cascade topology of modular DC-DC converters which is suitable for photovoltaic DC grid-connected is proposed, and the factors affecting the output pressure among modules are analyzed. A simplified control strategy is proposed. In addition, the control strategy between modules is also studied. Finally, the PSCAD/EMTDC simulation platform is used to verify the factors that affect the pressure between modules and verify the effectiveness of the proposed control strategy.

Key words

photovoltaic power generation / direct current (DC)grid-connected / DC-DC converter

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Xiangyang REN , Pan ZHOU , Chaobo DAI. DC-DC Converter for DC Grid-Connected Photovoltaic Power Generation Systems[J]. Distributed Energy Resources. 2020, 5(2): 27-34 https://doi.org/10.16513/j.2096-2185.DE.2003008

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