Group-Control Technology of Modular Parallel PV Grid-Connected Inverter

doi:10.11985/2016.04.006

Abstract

Abstract:

Due to the changes of the weather and the insolation, PV grid-connected inverters can hardly operate at their rated-power all time. In this case, some issues, like low efficiency and poor power quality, could happen to the traditional centralized-inverters. In order to enhance the efficiency for the solar power generation, a high-power inverter built up by a plurality of low-power modular inverters parallel with each other is introduced in the paper, which could coordinate the parallel low-power modular inverters in operation through group-control technology and realize the current average control by introducing the droop feature in DC side for the high-power inverter. Thus, the dynamic performance and stability for the high-power inverter system could have a significant improvement. As a result, a better efficiency and power quality will be achieved while the photovoltaic power plants are operating in all the power range.

Key words: Modular parallel inverters, group-control technology, droop feature in DC side, the dynamic performance and stability

CLC Number:

TM464

Huang Junjun,Wang Haining. Group-Control Technology of Modular Parallel PV Grid-Connected Inverter[J]. Journal of Electrical Engineering, 2016, 11(4): 35-40.

Figures/Tables 7

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