ANALYSIS AND CALCULATION METHOD OF DC IMPULSE CURRENT IN LOW VOLTAGE AC-DC HYBRID DISTRIBUTION SYSTEM CONNECTED BY DAB CONVERTER

Ke Haishan; Deng Wei; Pei Wei; Li Hongtao; Wen Weijie

doi:10.19912/j.0254-0096.tynxb.2024-2170

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (4) : 82-91. DOI: 10.19912/j.0254-0096.tynxb.2024-2170

ANALYSIS AND CALCULATION METHOD OF DC IMPULSE CURRENT IN LOW VOLTAGE AC-DC HYBRID DISTRIBUTION SYSTEM CONNECTED BY DAB CONVERTER

Ke Haishan^1,2, Deng Wei^1,2, Pei Wei^1,2, Li Hongtao³, Wen Weijie⁴

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Abstract

This paper addresses the DC-side impulse current caused by the integration of a dual active bridge （DAB） into low-voltage AC/DC hybrid distribution systems. A low-voltage AC/DC hybrid distribution system with DAB-based interfacing is considered. The circuit structure and control scheme under DAB integration are firstly analyzed. Based on the equivalent circuit model, a calculation method for the DC-side impules current is then developed. Typical operating conditions are investigated, including distributed generation interfaced through the DAB and bipolar short-circuit faults on the DC bus. Time-domain analytical expressions of the DC-side impules current are derived. The accuracy of the proposed method is validated through simulations. The transient characteristics of the DC-side impulse current and the influencing factors are further analyzed using the analytical results and simulation data.

Key words

dual active bridge DC-DC converters / distributed power generation / analytrc calculation / low voltage AC-DC hybrid distribution system / DC side impulse current / bipolar short-circuit faults

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Ke Haishan, Deng Wei, Pei Wei, Li Hongtao, Wen Weijie. ANALYSIS AND CALCULATION METHOD OF DC IMPULSE CURRENT IN LOW VOLTAGE AC-DC HYBRID DISTRIBUTION SYSTEM CONNECTED BY DAB CONVERTER[J]. Acta Energiae Solaris Sinica. 2026, 47(4): 82-91 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2170

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