A unified modeling and control of a multi-functional current source-typed converter for V2G application

Abstract In this paper, a topology based on current source-typed converter (CSC) is proposed for vehicle to grid (V2G) application, which consists of a current-source-type rectifier (CSR) and an auxiliary switching network (ASN). With the help of ASN, this topology is evolved into five circuit structures, and then could be operated in the corresponding five modes: buck charging, boost charging, buck discharging, boost discharging, and reactive power compensation. Therefore, it not only can adapt to a wider range of the battery voltage, but also can provide voltage support to the grid if necessary. For the ease of analysis, a unified mathematical model is established to describe the five operating modes, and a unified control scheme based on active disturbance rejection control (ADRC) idea is proposed to manage the related charging and discharging processes. Experimental results verify the correctness and effectiveness of the proposed topology and control scheme.

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