ANALYSIS AND RESEARCH OF NEW BIDIRECTIONAL ENERGY STORAGE CONVERTER

Zhang Yaowen; Zhang Zhengquan; Liu Qingxiang; Ou Weili

doi:10.19912/j.0254-0096.tynxb.2020-0183

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (4) : 82-89. DOI: 10.19912/j.0254-0096.tynxb.2020-0183

Topics on Key Technologies for Safety of Electrochemical Energy Storage Systems and Echelon Utilization of Decommissioned Power Batteries

ANALYSIS AND RESEARCH OF NEW BIDIRECTIONAL ENERGY STORAGE CONVERTER

Zhang Yaowen, Zhang Zhengquan, Liu Qingxiang, Ou Weili

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Abstract

The traditional two-stage energy storage converter has a DC support capacitor, and the electric energy needs to be converted multiple times, which leads to converter failure, reduced reliability and efficiency. To solve this problem, a new bidirectional energy storage converter based on high frequency AC link technology is proposed. The working principle of the converter is introduced in detail in this paper. On this basis, a feasible control algorithm is proposed based on the idea of charge distribution, and a Matlab/Simulink simulation model is established to verify the topology and control algorithm. Simulation results show that the topology can obtain stable output waveforms in off/grid mode, with a power factor greater than 0.99 and THD less than 3%. It can be applied to the cooperative work of the optical / storage microgrid and photovoltaic power generation system to effectively suppress photovoltaics Power fluctuations caused by the power generation system.

Key words

photovolatic power generation / PV-storage microgrid / circuit resonance / AC-link / grid-connected/off-grid

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Zhang Yaowen, Zhang Zhengquan, Liu Qingxiang, Ou Weili. ANALYSIS AND RESEARCH OF NEW BIDIRECTIONAL ENERGY STORAGE CONVERTER[J]. Acta Energiae Solaris Sinica. 2022, 43(4): 82-89 https://doi.org/10.19912/j.0254-0096.tynxb.2020-0183

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