改善微电网频率稳定性的分布式逆变电源控制策略

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Abstract The increasing penetration of large-scale distributed energy resources(DER) in micro-grid will bring a new challenge that the power electronic converter based distributed energy resources has no contribution to the micro-grid inertia. As an approach to making distributed energy resources including energy storage devices with virtual inertia, the virtual synchronous generator control strategy plays a significant role in the micro-grid frequency stability. On the basis of theoretical derivation and analysis of virtual synchronous generator control and microgrid, an overall virtual synchronous generator control strategy of distributed energy resources inverter is proposed to improve the frequency stability of microgrid. The outside control of distributed inverter is constructed by using synchronous generator’s rotor motion equation, primary frequency regulation feature and the delay characteristic of reactive power regulation. And the bottom control is adopted by the grid-connected vector relationship of synchronous generator. Finally, a simple micro-grid digital simulation system based on Matlab/Simulink and physical experiment platform are built, and the results show that the proposed virtual synchronous generator control method has an important effect on supporting the frequency stability of microgrid.

Key words： Distributed energy resources inverter microgrid virtual inertia frequency support frequency stability

Received: 17 May 2014 Published: 13 April 2015

PACS:

TM464

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	Articles by authors
	Meng Jianhui
	Shi Xinchun
	Wang Yi
	Fu Chao
	Li Peng

Cite this article:

Meng Jianhui,Shi Xinchun,Wang Yi等. Control Strategy of DER Inverter for Improving Frequency Stability of Microgrid[J]. Transactions of China Electrotechnical Society, 2015, 30(4): 70-79.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I4/70

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