微网用分布式电源变流器下垂特性控制策略

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Abstract The working principle of the microsource inverter is analyzed and the corresponding circuit model base on the fundamental component is provided in this paper. A new microsource control method is shown in this paper, its inner loop uses output voltage vector control which makes the inverter work as a voltage source, and be able to switch from grid-connected mode to islanding mode without restart process, its outer loop uses output power control with droop characteristics, which can realize the multi microsources to be paralleled without high speed communication; and by moving the droop characteristics of the microsources, the microsource inverter can realize the resynchronization with the grid, which means the seamless transition from islanding mode to grid-connected mode. Detailed analysis is shown in this paper, and experimentations on two 25kVA three phase inverters were finished to prove the performances of this control method.

Key words： Microsource voltage and frequency droop characteristics seamless transition microgrid control system

Received: 26 September 2011 Published: 20 March 2014

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TM464

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	Huang Xing
	Jin Xinmin

Cite this article:

Huang Xing,Jin Xinmin. A Voltage and Frequency Droop Control Method for Microsources[J]. Transactions of China Electrotechnical Society, 2012, 27(8): 93-100.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I8/93

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