A Coordinated Charging Strategy for Electric Vehicles in a Distribution System with Unbalanced Three-phase Photovoltaic Power Inputs

doi:10.3969/j.issn.1000-7229.2018.06.004

Abstract

Abstract: ABSTRACT： Extensive integration of electric vehicles （EVs） and distributed photovoltaic （PV） units will probably deteriorate the three-phase imbalance problem in the distribution system. A coordinated charging strategy is presented for EVs in the distribution system with unbalanced three-phase PV power inputs. First, the charging load is modeled on the basis of the travel behavior and charging characteristic of EVs. Then, on the basis of the three-phase power flow model of distribution system, an EV coordinated charging strategy is proposed with the objectives to optimize the daily load profile and to minimize the three-phase imbalance degree in the distribution system. Relevant decision variables include the charging phase, charging power and charging time of EVs. The formulated optimization model is solved by using the adaptive genetic algorithm. Finally, a modified IEEE 33-bus distribution system is employed to demonstrate the proposed method.

Key words: KEYWORDS： distribution system, electric vehicle （EV）, distributed photovoltaic （PV） unit, load profile, three-phase imbalance, coordinated charging, adaptive genetic algorithm

CLC Number:

LIU Xunyuan, QI Feng, WEN Fushuan, FENG Changsen, WANG Lei, ZOU Bo, ZHANG Xizhu.

A Coordinated Charging Strategy for Electric Vehicles in a Distribution System with Unbalanced Three-phase Photovoltaic Power Inputs[J]. Electric Power Construction, 2018, 39(6): 21-.

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