高效填谷式电池放电变换器及并联控制方法

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Abstract The step-up power stage is usually used in the battery discharge regulator (BDR) which provides energy from the battery to the bus in high-power photovoltaic generation system. The advantages and disadvantages of three step-up power topologies are compared by simulation analysis in this paper, and the valley-fill phase-shift full-bridge power topology is adopted. The dual-loop control converter based on conductance control is proposed to achieve parallel operation of BDR modules, and the compensator of current-sharing accuracy has been designed to improve the current-sharing performance of BDR modules in parallel operation. Excellent dynamic response of the bus is ensured by the external voltage control loop. An example of 1500W BDR module is given in the paper, and the experimental results show that the output current-sharing accuracy is better than 1%, the efficiency of 10% load is 95%, the efficiency of half load is 98.5%, and the efficiency of full load is above 97%. Good static and dynamic performance is achieved by using the parallel control theory and the compensator of current-sharing accuracy, which provides an effective technical approach for the power extension of high-power BDR modules.

Key words： BDR (battery discharge regulator) valley-fill phase-shift full-bridge conductance control modules in parallel operation current sharing

Received: 20 October 2010 Published: 07 March 2014

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TM914

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	Articles by authors
	Bao Zhiyun
	Fu Ming
	Wang Mingyan

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Bao Zhiyun,Fu Ming,Wang Mingyan. High Efficiency Valley-fill Battery Discharge Regulator and Conductance Control in Parallel Operation[J]. Transactions of China Electrotechnical Society, 2011, 26(1增): 15-22.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2011/V26/I1增/15

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