Technical and economical evaluation of reactive power service from aggregated EVs

Mohammad Nikkhah Mojdehi, Makan Fardad, Prasanta K Ghosh

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In this paper we present a novel framework to evaluate the capability and cost of providing reactive power service by electric vehicles (EVs). EVs are becoming a promising reactive power service provider because of their short response time and little or no battery degradation during this service. The presented framework is flexible enough to be easily integrated in different market structures proposed in the literature. A linear program is developed to minimize the operating cost of an EV under a range of practical constraints. These constraints include owner's desired state of charge, battery degradation, and limitation in the current ripple from the DC-link capacitor of the EV charger. The developed framework yields optimal charging/discharging schedules for EVs. We also present an algorithm to calculate the reactive power supply function (RPSF) of the EV, as a step-wise ascending function of reactive power, in real-time. The RPSF is calculated based on the price of electricity provided by the grid operator, scheduled charging/discharging activities, and constraints on the EV charger. Simulation results clearly show an opportunity to provide reactive power service by EVs with low marginal cost, especially during on-peak periods when the need of reactive power is high.

Original languageEnglish (US)
Pages (from-to)132-141
Number of pages10
JournalElectric Power Systems Research
Volume133
DOIs
StatePublished - Apr 1 2016

Fingerprint

Electric vehicles
Reactive power
Degradation
Operating costs
Costs
Capacitors
Electricity

Keywords

  • EV
  • Linear programming
  • Marginal cost
  • Reactive power supply function

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Technical and economical evaluation of reactive power service from aggregated EVs. / Mojdehi, Mohammad Nikkhah; Fardad, Makan; Ghosh, Prasanta K.

In: Electric Power Systems Research, Vol. 133, 01.04.2016, p. 132-141.

Research output: Contribution to journalArticle

@article{4e806adf9c844e5dbb068fda4dd4d2b6,
title = "Technical and economical evaluation of reactive power service from aggregated EVs",
abstract = "In this paper we present a novel framework to evaluate the capability and cost of providing reactive power service by electric vehicles (EVs). EVs are becoming a promising reactive power service provider because of their short response time and little or no battery degradation during this service. The presented framework is flexible enough to be easily integrated in different market structures proposed in the literature. A linear program is developed to minimize the operating cost of an EV under a range of practical constraints. These constraints include owner's desired state of charge, battery degradation, and limitation in the current ripple from the DC-link capacitor of the EV charger. The developed framework yields optimal charging/discharging schedules for EVs. We also present an algorithm to calculate the reactive power supply function (RPSF) of the EV, as a step-wise ascending function of reactive power, in real-time. The RPSF is calculated based on the price of electricity provided by the grid operator, scheduled charging/discharging activities, and constraints on the EV charger. Simulation results clearly show an opportunity to provide reactive power service by EVs with low marginal cost, especially during on-peak periods when the need of reactive power is high.",
keywords = "EV, Linear programming, Marginal cost, Reactive power supply function",
author = "Mojdehi, {Mohammad Nikkhah} and Makan Fardad and Ghosh, {Prasanta K}",
year = "2016",
month = "4",
day = "1",
doi = "10.1016/j.epsr.2015.11.011",
language = "English (US)",
volume = "133",
pages = "132--141",
journal = "Electric Power Systems Research",
issn = "0378-7796",
publisher = "Elsevier",

}

TY - JOUR

T1 - Technical and economical evaluation of reactive power service from aggregated EVs

AU - Mojdehi, Mohammad Nikkhah

AU - Fardad, Makan

AU - Ghosh, Prasanta K

PY - 2016/4/1

Y1 - 2016/4/1

N2 - In this paper we present a novel framework to evaluate the capability and cost of providing reactive power service by electric vehicles (EVs). EVs are becoming a promising reactive power service provider because of their short response time and little or no battery degradation during this service. The presented framework is flexible enough to be easily integrated in different market structures proposed in the literature. A linear program is developed to minimize the operating cost of an EV under a range of practical constraints. These constraints include owner's desired state of charge, battery degradation, and limitation in the current ripple from the DC-link capacitor of the EV charger. The developed framework yields optimal charging/discharging schedules for EVs. We also present an algorithm to calculate the reactive power supply function (RPSF) of the EV, as a step-wise ascending function of reactive power, in real-time. The RPSF is calculated based on the price of electricity provided by the grid operator, scheduled charging/discharging activities, and constraints on the EV charger. Simulation results clearly show an opportunity to provide reactive power service by EVs with low marginal cost, especially during on-peak periods when the need of reactive power is high.

AB - In this paper we present a novel framework to evaluate the capability and cost of providing reactive power service by electric vehicles (EVs). EVs are becoming a promising reactive power service provider because of their short response time and little or no battery degradation during this service. The presented framework is flexible enough to be easily integrated in different market structures proposed in the literature. A linear program is developed to minimize the operating cost of an EV under a range of practical constraints. These constraints include owner's desired state of charge, battery degradation, and limitation in the current ripple from the DC-link capacitor of the EV charger. The developed framework yields optimal charging/discharging schedules for EVs. We also present an algorithm to calculate the reactive power supply function (RPSF) of the EV, as a step-wise ascending function of reactive power, in real-time. The RPSF is calculated based on the price of electricity provided by the grid operator, scheduled charging/discharging activities, and constraints on the EV charger. Simulation results clearly show an opportunity to provide reactive power service by EVs with low marginal cost, especially during on-peak periods when the need of reactive power is high.

KW - EV

KW - Linear programming

KW - Marginal cost

KW - Reactive power supply function

UR - http://www.scopus.com/inward/record.url?scp=84953311658&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84953311658&partnerID=8YFLogxK

U2 - 10.1016/j.epsr.2015.11.011

DO - 10.1016/j.epsr.2015.11.011

M3 - Article

VL - 133

SP - 132

EP - 141

JO - Electric Power Systems Research

JF - Electric Power Systems Research

SN - 0378-7796

ER -