ENERGY MANAGEMENT CONTROL STRATEGY FOR PHOTOVOLTAIC-ENERGY STORAGE SYSTEM CONSIDERING STATE OF CHARGE OF BATTERY

Zeng Hanchao; Tang Yong; Chen Long; Zhang Damin; Zheng Xueqin; Jiang Jiahui

doi:10.19912/j.0254-0096.tynxb.2024-2228

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (4) : 161-169. DOI: 10.19912/j.0254-0096.tynxb.2024-2228

ENERGY MANAGEMENT CONTROL STRATEGY FOR PHOTOVOLTAIC-ENERGY STORAGE SYSTEM CONSIDERING STATE OF CHARGE OF BATTERY

Zeng Hanchao^1,2, Tang Yong¹, Chen Long¹, Zhang Damin^1,2, Zheng Xueqin^1,2, Jiang Jiahui³

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Abstract

To address the issues of large volume and weight caused by using multiple two-port converters in traditional photovoltaic （PV）-storage system, as well as the instability of PV power generation leading to battery overcharge and over discharge, an energy management control strategy of three-port converter （TPC） considering the battery’s state of charge （SOC） is proposed. The principal characteristics, six power supply modes and their smooth switching mechanism of the converter are thoroughly studied. The TPC is composed of dual Buck / Boost and dual active bridge （DAB） through the bridge arm multiplexing integration; the energy management control strategy adopts the pulse width + phase shift modulation based on the minimum value selection, and utilizs the SOC of battery to dynamically adjust its charge and discharge reference, which solvs the problem of overcharge and over discharge and realizs the smooth switching among different power supply modes. Four voltage patterns and their boundary conditions are analyzed, and the relationship between output power and phase shift angle and duty cycle was derived. Semi-physical experimental results verify the feasibility and effectiveness of the proposed energy management control strategy.

Key words

three-port converter / state of charge / energy management / PV-storage power generation system / battery life

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Zeng Hanchao, Tang Yong, Chen Long, Zhang Damin, Zheng Xueqin, Jiang Jiahui. ENERGY MANAGEMENT CONTROL STRATEGY FOR PHOTOVOLTAIC-ENERGY STORAGE SYSTEM CONSIDERING STATE OF CHARGE OF BATTERY[J]. Acta Energiae Solaris Sinica. 2026, 47(4): 161-169 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2228

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