Research and Analysis on Current Control Methods of a Single-Phase Grid-Connected Inverters for Photovoltaic Modules

doi:10.11930/j.issn.1004-9649.2016.08.087.06

Abstract

Abstract: The basic current control methods of a single-phase grid-connected inverter for photovoltaic modules are studied, and an inverter control strategy of dual close loop with proportional resonant (PR) controller and grid voltage fed forward is presented in this paper. Based on a theoretical analysis of the PR controller, the parameters are designed. In order to study the effect of the control method for improving the output power quality, a simulation model of the grid-connected inverter control system is established, and the PI control and PR control method are respectively analyzed under three scenarios including grid with nominal voltage, grid with voltage mutation and grid containing low harmonics. The result of this study is significant for developing the control system of single-phase grid-connected inverters.

Key words: grid-connected inverters control, proportional resonant(PR) controller, hysteresis controller, proportional integral (PI) controller

CLC Number:

TM615

QIN Rui, ZHEN Wenxi, CHEN Yicong, MA Xiping, YANG Jun, WEI Bo. Research and Analysis on Current Control Methods of a Single-Phase Grid-Connected Inverters for Photovoltaic Modules[J]. Electric Power, 2016, 49(8): 87-92.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2016.08.087.06

https://www.electricpower.com.cn/EN/Y2016/V49/I8/87

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