Abstract
The global acceptance and off-grid charging of plug-in electric vehicles (PEVs) are expected to grow tremendously in the next few years. Uncoordinated PEV charging can cause serious grid issues such as overloading of transformers and unacceptable voltage drops. Single-phase residential charging can also initiate or contribute to voltage unbalance conditions in the distribution networks. A potential solution and key challenge for PEV integration is shifting of the charging activities to off-peak periods. This paper proposes a new PEV coordination approach based on genetic algorithm (GA) optimization to perform online centralized charging and discharging considering transformer loading and node voltage magnitude and unbalance profiles. It allows PEV as source of active and reactive power to participate in energy market based on different prices during a day, without any degradation. Finally, the impacts of uncoordinated and the proposed GA coordinated PEV charging/discharging strategy are simulated for a real unbalanced Western Australian distribution network in the Perth solar city over 24 h.
Highlights
Traditional methods for voltage mitigation and unbalance issues such as online tap changer (OLTC), voltage regulators (VRs), fixed or switched shunt capacitors and energy storages devices were applied on the feeder [6,7,8]
Based on the integration of plug-in electric vehicles (PEVs) as active and reactive power providers in the market, this paper presents an online genetic algorithm (GA)-based PEV coordination charging/discharging strategy for an unbalanced three-phase four-wire LV distribution network
Performing centralized and coordinated PEV charging/discharging (OL-CD-TPQ) for active/reactive power consumption/injection at selected nodes for further voltage regulation and voltage unbalanced factor (VUF) reduction based on energy prices for both active and reactive power
Summary
The popularity of using PEVs globally as an alternative to traditional petroleum product-fueled automobiles is increasing due to the environmental concerns and economics [1]. Some researchers have tried to develop a control method for present distribution voltage management devices such as DSTATCOM or VR [7], while others have investigated the possibility of controlling the active and reactive power injection from distribution generation (DG) by using centralized and decentralized techniques [8,9] to moderate the voltage issues in networks [10] These investigations revealed that researchers and the utilities are motivated to find new and practical approaches for the issues associated with voltage variations and grid performance
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
