微网中分布式电源逆变器的多环反馈控制策略

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Abstract A multiple feedback loop control scheme for micro source inverters in Microgrid is developed in this paper. Based on the analysis of the inverter output impedance influenced by the line impedance parameters and the controller parameters, the voltage and the current controllers in the inner-loop are designed. The PI voltage regulator is applied to make the load voltage stable. The current loop uses the proportional regulator to improve the dynamic performance. After the output impedance is designed as an inductance impedance, the power controller in the outer-loop is produced based on the droop characteristics to achieve the wireless communication between paralleled inverters in Microgrid. With the implementation of the multiple feedback loop controller, the Microgrid can export high-quality power under the grid-connected mode. When the utility fault occurs, the Microgrid runs from grid-connected mode to islanding mode, and the designed controller will regulate the active and reactive power flow and enable power sharing between the paralleled micro sources in the Microgrid. Also, the controller can make the conversion between different modes seamless. The simulation results show the validity of the proposed scheme.

Key words： Distributed generation microgrid inverter multiple feedback loop controller

Received: 30 June 2007 Published: 11 February 2014

PACS:	TM464
	TM711

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	Wang Chengshan
	Xiao Zhaoxia
	Wang Shouxiang

Cite this article:

Wang Chengshan,Xiao Zhaoxia,Wang Shouxiang. Multiple Feedback Loop Control Scheme for Inverters of the Micro Source in Microgrids[J]. Transactions of China Electrotechnical Society, 2009, 24(2): 100-107.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2009/V24/I2/100

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作者简介: 王成山男, 1962年生, 长江学者特聘教授, 研究方向为电力系统安全性分析、城市电网规划和配电系统自动化、分布式发电等。肖朝霞女, 1981年生, 博士研究生, 研究方向为分布式发电。