纯电动客车复合储能系统功率分配控制策略研究

doi:10.19595/j.cnki.1000-6753.tces.181477

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Abstract Given the excessive battery power in the composite energy storage system, two power allocation control strategies were developed, namely, the logic threshold control strategy and fuzzy control strategy. Lithium battery cells were subject to different rates of charge and discharge and self-discharge experiments. In the study, a super capacitor was subjected to constant current charge and discharge and constant power discharge experiments. Based on the experimental data, the least squares method was used for parameter identification. The model parameters of the composite energy storage system were obtained. The vehicle model was constructed based on the Matlab-Cruise, and the dynamic link library was then created to realize real-time simulation of control strategies. The power curves, SOC curves of the lithium battery, and energy flow diagrams of the energy storage system were given when the lithium battery operated by itself, when the threshold control strategy was adopted, and when the fuzzy control strategy was adopted, and the contrast analysis was subsequently performed. The simulation results show that compared with the logic threshold control strategy, the fuzzy control strategy improves SOC of lithium battery by 0.162%, and the energy saving is 0.430 1kW·h in the urban road conditions in China. In order to verify the effectiveness of the proposed strategy, the test bench of the composite energy storage bus driving system was built. The simulation and experimental results show that proposed the fuzzy control strategy of composite energy storage system can reduce the current of lithium battery and recover braking energy effectively.

Key words： Pure electric bus composite energy storage model construction power allocation control strategy

Received: 10 September 2018 Published: 11 December 2019

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TM912

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	Zhou Meilan
	Feng Jifeng
	Zhang Yu
	Yang Mingliang
	Wu Xiaogang

Cite this article:

Zhou Meilan,Feng Jifeng,Zhang Yu等. Research on Power Allocation Control Strategy For Compound Electric Energy Storage System of Pure Electric Bus[J]. Transactions of China Electrotechnical Society, 2019, 34(23): 5001-5013.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.181477 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I23/5001

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