Integration of Electric Vehicles into the Power Distribution Network with a Modified Capacity Allocation Mechanism

Junjie Hu, Hugo Morais, Tiago Sousa, Shi You, Reinhilde D'hulst

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Abstract

The growing penetration of electric vehicles (EVs) represents an operational challenge to system operators, mainly at the distribution level by introducing congestion and voltage drop problems. To solve these potential problems, a two-level coordination approach is proposed in this study. An aggregation entity, i.e., an EV virtual power plant (EV-VPP), is used to facilitate the interaction between the distribution system operator (DSO) and EV owners considering the decentralized electricity market structure. In level I, to prevent the line congestion and voltage drop problems, the EV-VPP internally respects the line and voltage constraints when making optimal charging schedules. In level II, to avoid power transformer congestion problems, this paper investigates three different coordination mechanisms, or power transformer capacity allocation mechanisms, between the DSO and the EV-VPPs, considering the case of EVs charging and discharging. The three mechanisms include: (1) a market-based approach; (2) a pro-rata approach; and (3) a newly-proposed constrained market-based approach. A case study considering a 37-bus distribution network and high penetration of electric vehicles is presented to demonstrate the effectiveness of the proposed coordination mechanism, comparing with the existing ones.
Original languageEnglish
Article number200
JournalEnergies
Volume10
Issue number2
Number of pages20
ISSN1996-1073
DOIs
Publication statusPublished - 2017

Keywords

  • Computer Science (all)
  • Coordination mechanisms
  • Electric vehicles
  • Network-constrained operation
  • Virtual power plants
  • Commerce
  • Electric power plants
  • Power transformers
  • Problem solving
  • Traffic congestion
  • Vehicles
  • Decentralized electricity
  • Distribution systems
  • Electric Vehicles (EVs)
  • Market-based approach
  • Operational challenges
  • Power distribution network
  • Electric power distribution
  • coordination mechanisms
  • electric vehicles
  • network-constrained operation
  • virtual power plants
  • Technology
  • T
  • ENERGY
  • CONGESTION MANAGEMENT
  • SMART GRIDS
  • SYSTEM
  • OPTIMIZATION
  • MICROGRIDS
  • ALGORITHMS
  • RESOURCE

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