Investigating Wireless Charging and Mobility of Electric Vehicles on Electricity Market

Abstract

To avoid inconvenient vehicle stops at charging stations, the on-road wireless charging of electric vehicles (EVs) is a promising application in the future smart grid. In this paper, we study a critical yet open problem for this application, i.e., the impact of wireless charging and mobility of EVs on the wholesale electricity market based on locational marginal price (LMP), which is mainly determined by the EV mobility patterns. To capture the dynamics in vehicle traffic flow and state of charge (SOC) of EV batteries, we model the EV mobility as a queueing network based on the statistics obtained via traffic information systems. Then, the load on each power system bus with respect to EV wireless charging is obtained using the stationary distribution of the queueing network. An economic dispatch problem is formulated to incorporate the EV wireless charging demand, and the LMP of each power system bus is obtained. Further, a pricing mechanism based on the LMP variations of power system buses is investigated to enhance the social welfare. The performance of our proposed analytical model is verified by a realistic road traffic simulator (SUMO) based on a 3-bus test system and an IEEE 30-bus test system, respectively. Simulation results indicate that our proposed analytical model can accurately provide an estimation of the LMP variations due to EV wireless charging.

A Survey on PEV Charging Infrastructure: Impact Assessment and Planning

“…Reliability analysis and system protection are essential; • Wireless charging of PEVs: Wireless power transfer technology is a relatively new charging technology, which is introduced to enable PEV charging without cables. Wireless charging can be classified to either stationary or dynamic charging [79,80]. Stationary charging enables the PEVs to be charged when they are parked.…”

“…Moreover, range anxiety and concerns about charging time will be eliminated if a large scale charging infrastructure based on dynamic wireless charging is deployed. However, wireless charging suffers from low efficiency, high power loss, and lack of standards for dynamic charging [80]. Also, power flow management of simultaneously charging PEVs on the same dynamic charging lane and the impacts on the distribution system are still open issues.…”

A Modular AC-DC Power Converter with Zero Voltage Transition for Electric Vehicles

“…An available method of ensuring operator reliability with high currents, obtaining a simple way of connecting the charge uses wireless power transfer [8][9][10]. This is a twofold method, since the technique commonly uses a transformer to effectively isolate the power transfer from the user, and provides possible circuit splitting since the transformer is operated as an intermediary between two modules.…”

Investigation of a SP/S Resonant Compensation Network Based IPT System with Optimized Circular Pads for Electric Vehicles

“…The two coils are usually installed underground and in the EV's chassis, respectively [7]- [17]. The predominant limiting factor that affects the transfer capacity of the effective power is the magnetic coupling coefficient of the magnetic structure [4]- [5], [11], [12]. In an IPT system, the magnetic structure is usually designed as two pads.…”

“…These designs need large-sized ferrite cores to form a magnetic flux path, and they could only transfer power through a very small gap. The designs using pot cores, U-shape cores or E-cores are necessarily thick, which is a problem when it comes to chasis requirements [5], [17], [18], [21], [22]. In order to solve this problem, some new magnetic structures have been presented in [1], [2], [9]- [12], [23], [24].…”