并联型储能系统孤网运行协调控制策略

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Abstract As a valid alternative,battery energy storage system(BESS) is an effective method to maintain the stability of islanded power system consisting of fluctuant renewable energy sources (RES) and load disturbances. Parallel-connected battery energy storage system (P-BESS) will supply high capacity when BESSs are connected in parallel. The operational principle of P-BESS is analyzed. On the basis of the analysis of operating characteristic of battery system and traditional droop control,a new method based on state of charge (SOC) of battery system is proposed to share load power,named power cooperative control outer loop. Moreover,considering an inherent static error in droop control and the impedance being not pure inductance in middle or low voltage grid,an inner loop control strategy based on linear compensating loop is presented,named voltage amplitude and frequency control. Simulation and experimental results show that not only the voltage and frequency of the system can be kept at desired level,but the load powers can be shared effectively regardless of various loads by the proposed method,which contributes to the balance management of battery system.

Key words： Parallel-connected battery energy storage system load sharing voltage amplitude and frequency control state of charge

Received: 18 September 2012 Published: 11 December 2013

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TM315

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	Peng Simin
	Dou Zhenlan
	Ling Zhibin
	Cai Xu

Cite this article:

Peng Simin,Dou Zhenlan,Ling Zhibin等. Cooperative Control for Parallel-Connected Battery Energy Storage System of Islanded Power System[J]. Transactions of China Electrotechnical Society, 2013, 28(5): 128-134.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I5/128

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