基于单脉冲注入的直流微电网线路阻抗检测

doi:10.19595/j.cnki.1000-6753.tces.170514

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Abstract

InDCmicrogrid,the existence of line impedance on the parallel converteroutput side results in bad influence on the traditional droop control method.To solve this problem, this paper propose an active impedance detection method based on the DCmicrogridspecific system structure.By injectinga pulse disturbanceactively and detecting the changes of output voltage and current, the line impedance could be obtained and used to compensate the droop coefficient. This method improves the load current sharing accuracy and restores the dc bus voltage.Because the method belongs to the active impedanceidentification, the influence on power quality is tiny and controllable.Finally, simulation and experimental results validate the feasibility and effectiveness of the proposed method.

Key words： DCmicrogrid line impedance load sharing active impedance identification

Received: 24 April 2017 Published: 13 June 2018

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TM615

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	Articles by authors
	Liu Chen
	ZhaoJinbin
	Wang Shanshan
	Qu Keqing
	Li Fen

Cite this article:

Liu Chen,ZhaoJinbin,Wang Shanshan等. A Line Impedance Identification Based on Single Pulse Injection in DC Microgrid[J]. Transactions of China Electrotechnical Society, 2018, 33(11): 2584-2591.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.170514 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I11/2584

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