A Single-Phase Current-Source Bidirectional Converter for V2G Applications

Abstract

In this paper, a single-phase current-source bidirectional converter topology for V2G applications is proposed. The proposed converter consists of a single-phase current-source rectifier (SCSR) and an auxiliary switching network (ASN). It offers bidirectional power flow between the battery and the grid in the buck or boost mode and expands the output voltage range, so that it can be compatible with different voltage levels. The topology structure and operating principles of the proposed converter are analyzed in detail. An indirect control algorithm is used to realize the charging and discharging of the battery. Finally, the semiconductor losses and system efficiency are analyzed. Simulation and experimental results demonstrate the validity and effectiveness of the proposed topology.

A Single-Phase Bidirectional AC/DC Converter for V2G Applications

“…The efficiency is estimated according to Equation (14)- (20), the results are shown in Figure 6. The efficiency changes as a function of the input current rms when the grid voltage is 220 V and the battery voltage is 120 V. It can be seen that the maximum efficiency is larger than 95%.…”

“…In [18,19] a dual active-bridge (DAB) converter is considered due to its simple topology and good output waveforms, but the current in the circulation process is high. In [20], a converter consisting of a single-phase current-source rectifier and an auxiliary switching network is proposed. It has high efficiency and offers bidirectional power flow.…”

Active damping method based self‐adjust notch filter for current source converter

“…However, comparing with VSC, CSC has the advantages such as AC voltage boost from DC voltage, implicit short‐circuits protection, friendly waveforms with low d v /d t and so on. CSC is a good alternative in the high/medium motor drive [1–3], electric vehicle charging [4] and wind power integration [5, 6].…”

“…For suppressing resonance, a physical damping resistor can be inserted into the LC filter, which increases power losses [5–7]. The preferred method is to modify control algorithm to realise active damping.…”

Design and analysis of isolated and non-isolated bidirectional converter for high voltage applications

“…Hence due to the switching loss, the efficiency of this system is reduced (Ryu, 2014; Kang et al , 2014). In order to reduce switching losses that occur during the switching operation, many soft switching methods such as zero voltage switching (ZVS) and zero current switching have been introduced (Huang et al , 2010; Lee et al , 2003; Jung et al , 2013; Hua et al , 1994; Kim et al , 2013; Han et al , 2014; Wen and Su, 2015). In the case of conventional BDC shown in Figure 1, the main switches operate under hard switching condition during boost mode and buck mode.…”