Abstract
This paper presents a new multi-function conversion technique for vehicle-to-grid (V2G) applications. The proposed bi-directional charger can achieve three functions, including EV battery charging, grid-connection and reactive compensation, which are keys for energy management of the grid. With the proposed multi-function technology, the bi-directional charger will benefit both the grid and electricity customers. A hybrid regulation of energy bi-directional transfer for V2G systems is proposed in this paper, which consists of the battery-side controller and the grid-side controller. This proposed multi-function conversion technique improves the whole system performance with proportional-resonant (PR) control and achieves reactive power compensation with instantaneous reactive theory and a deadbeat control scheme. Simulation and experimental results demonstrate the validity of this new multi-function technique in a V2G system.
Highlights
Due to the increasingly prominent energy problem and environmental pollution, electric vehicles (EVs) are gradually replacing traditional automobiles equipped with internal combustion engines.the continuous development of outstanding performance batteries and high-efficiency motors has spurred dramatic interest in EVs, which are regarded as representatives of new energy vehicles [1,2,3,4]
Based on the Chinese household electric system, the proposed bi-directional transfer circuit topology for V2G is put forward in Figure 2, which includes a grid-side converter, a protection circuit and a battery-side converter. This V2G system can operate in three modes: charging mode, grid-connected mode and reactive power compensation mode
This paper presents a new multi-function conversion technique for vehicle-to-grid (V2G), including bi-directional convert topology, control strategy and reactive compensation application based on V2G
Summary
Due to the increasingly prominent energy problem and environmental pollution, electric vehicles (EVs) are gradually replacing traditional automobiles equipped with internal combustion engines. Several circuit topologies and control methods are discussed and the advantages of each are analyzed correspondingly, but all they show are the topologies’ optimal design and analysis focused on the operating modes of charging and discharging for EVs. A globally optimal scheduling scheme and a locally optimal scheduling scheme for EV charging and discharging are proposed in [17]. The strategies which are used to realize the reactive power compensation and the relevant experimental verification are rarely analyzed, it is necessary to develop a new method for V2G to achieve a multi-function conversion technique which includes EV battery charging, grid-connection and local reactive compensation. Compared with the traditional V2G power transfer technology, the multi-function EV system proposed in this paper can operate in different modes and realize local reactive compensation.
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