Preprint Article Version 1 This version is not peer-reviewed

Optimal Operation Strategy of ESS for EV Charging Infrastructure for Voltage Stabilization in Secondary Feeder of Distribution System

Version 1 : Received: 7 November 2019 / Approved: 8 November 2019 / Online: 8 November 2019 (04:29:04 CET)

How to cite: Kim, D.; Ryu, K.; Ko, H.; Kim, B. Optimal Operation Strategy of ESS for EV Charging Infrastructure for Voltage Stabilization in Secondary Feeder of Distribution System. Preprints 2019, 2019110089 (doi: 10.20944/preprints201911.0089.v1). Kim, D.; Ryu, K.; Ko, H.; Kim, B. Optimal Operation Strategy of ESS for EV Charging Infrastructure for Voltage Stabilization in Secondary Feeder of Distribution System. Preprints 2019, 2019110089 (doi: 10.20944/preprints201911.0089.v1).

Abstract

The introduction of electrical vehicle charging infrastructure including EV charger, renewable energy resource at secondary feeder in distribution system has been increased as one of countermeasure for global environmental issues. However, the Electric Vehicle Charging (EVC) infrastructure may act as the peak load in distribution system, which can adversely impact on the voltage stability when the electric vehicle is quickly charged. Therefore, to keep within the limit capacity of secondary feeder and allowable limit for feeder voltage, this paper proposes a stabilization method by the Energy Storage System (ESS) control strategy at secondary feeder in order to be not violated over than lower and upper limit. Also, this paper presents the estimation method to keep the proper standard value of State of Charge (SOC). From the simulation results, the voltage stabilization operation by ESS should make the feeder voltages of the distribution system(secondary feeder) introduced EVC Infra keep better voltage conditions, also estimation method to keep the proper standard value is confirmed that the SOC of ESS when is the standby condition could be exactly kept within the proper reference range.

Subject Areas

electrical vehicle charging infrastructure; State of charge; stabilization method; ESS control strategy; coordination operation; violation of voltage; Energy Storage System

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