A method for compensating customer voltage drops due to nighttime simultaneous charging of evs utilizing reactive power injection from battery chargers

Noda, Taku; Kabasawa, Yuichiro; Fukushima, Kentaro; Nemoto, Koshichi; Uemura, Satoshi

doi:10.1002/eej.22390

Cited by 13 publications

(7 citation statements)

References 24 publications

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“…Besides, the same effect can be expected with voltage control schemes using standard chargers installed at homes, and so on, as examined in literature [12,13]. When a selfexcited inverter is used as AC-DC converter, reactive power compensation (injection and absorption) can be realized by modifying control circuits.…”

Section: Introductionmentioning

confidence: 69%

Voltage Regulation Utilizing Electric Vehicle Rapid Chargers in a Distribution System

Nakamura

Hara

Kita

et al. 2018

Electrical Engineering Japan

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From growing interests in the environment issues, promotion of photovoltaic power generation (PV) is accelerated in the world. Meanwhile, rapid chargers (RCs) for popularized electric vehicles are being installed in urban areas. These two trends in distribution system might cause severer voltage fluctuation problems. On the other hand, a RC can provide the reactive power support, which is capable of voltage regulation. Based on this viewpoint, this paper proposes a new framework of voltage regulation, in which the reactive power compensation by RCs is actively utilized. The proposed voltage regulation method combines two different control functions with consideration for overcompensation avoidance. This paper ascertains the validity of proposed voltage regulation method through numerical simulations. C⃝ 2018 Wiley Periodicals, Inc. Electr Eng Jpn, 204(3): 21-30, 2018; Published online in Wiley Online Library (wileyonlinelibrary.com).

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Section: Introductionmentioning

confidence: 69%

Voltage Regulation Utilizing Electric Vehicle Rapid Chargers in a Distribution System

Nakamura

Hara

Kita

et al. 2018

Electrical Engineering Japan

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“…In this figure p and q represent the active and reactive power, L c is the coupling inductor, v i and i i are the voltage and current on the grid side and V o and I o are the voltage and current on the battery side. Based on the request signal from distribution system operator (DSO) for reactive power support, digital control system can absorb/inject the desired reactive power into the grid by controlling the voltage magnitude and the phase angle, generated by the AC-DC converter part of the EV charger [8].…”

Section: Ev Operating Modelmentioning

confidence: 99%

“…VSC circuit can adjust absorption/injection of reactive power to the grid, by controlling the generated voltage magnitude and phase angle. In references [7]- [8] the technical feasibilities of VSC to provide reactive power services was discussed. Therefore, in addition to energy related V2G services, reactive power services could create another revenue stream for EV owners [9].…”

Section: Introductionmentioning

confidence: 99%

Estimation of the Battery Degradation Effects on the EV Operating Cost during Charging/Discharging and Providing Reactive Power Service

Mojdehi

Ghosh

2015

2015 IEEE 81st Vehicular Technology Conference (VTC Spring)

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Dynamic environment of the power system can be better controlled by the smart usage of electric vehicles (EVs). EVs with their diverse capabilities can create opportunities for Distribution System Operator (DSO) to improve the efficiency, economics, and sustainability of power delivery system. For instance, reactive power support can be provided by EVs quickly, when needed by the DSO. This type of ancillary service is becoming a necessity, due to higher power demands and continuous change in supply-demand environment. On the other hand, high battery price discourages consumers to purchase EVs. Therefor, creating ways to reduce the overall battery cost by generating revenue through participation in the power market, could be a win-win situation for both, EV owner and the DSO. Revenue generation for EVs could be achieved by supplying active and/or reactive power. In this paper, we present a model of EV operating as a reactive power service provider, considering the battery degradation, as a function of active power flow. The developed model includes charger technical constraints. Simulation results show optimal operating cost estimation, taking into consideration the effect of the battery degradation on charging, discharging and reactive power service of the EV under different scenarios. Results indicate significant change in active power charging and discharging patterns when the battery degradation cost is included. Revenue generating potential of providing reactive power service by EVs could be an encouraging fact for EVs to participate in reactive power market.

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“…It is estimated that EVs will be charged at nighttime. This simultaneous charging may cause an overload and voltage drops at consumers [10].…”

Section: Svr Svc and Statcommentioning

confidence: 99%

Present state and future plan of standard model development for smart grid simulations

Noda

Kabasawa

Fukushima

et al. 2012

2012 IEEE 13th Workshop on Control and Modeling for Power Electronics (COMPEL)

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The government of Japan assumes that a large portion of renewable energy in the near future will be provided by photovoltaic generation systems installed at end consumers. Thus, smart grids in Japan will be established mainly at the distribution and the end-consumer level of power systems. Considering this situation, the Smart Grid Working Group, created inside the Cooperative Study Group on Applications of Power Electronic Simulations of IEEJ (Institute of ElectricalEngineers of Japan), is currently discussing and developing standard simulation models for components of the distributionand the end-consumer-level power systems. These components include distribution substations, distribution lines, voltage regulation equipment, pole-mounted transformers, photovoltaic panels, power conditioning systems, Li-ion batteries, and small and micro wind power generation systems. The purpose of developing the standard models is to use in transient simulations related to smart grids. This paper describes the present state and the future plan of the development of the standard models.

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A method for compensating customer voltage drops due to nighttime simultaneous charging of evs utilizing reactive power injection from battery chargers

Cited by 13 publications

References 24 publications

Voltage Regulation Utilizing Electric Vehicle Rapid Chargers in a Distribution System

Voltage Regulation Utilizing Electric Vehicle Rapid Chargers in a Distribution System

Estimation of the Battery Degradation Effects on the EV Operating Cost during Charging/Discharging and Providing Reactive Power Service

Present state and future plan of standard model development for smart grid simulations

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