NDLI: Robust multi-objective PQ scheduling for electric vehicles in flexible unbalanced distribution grids

Content Provider	IET Digital Library
Author	Knezović, Katarina Soroudi, Alireza Keane, Andrew Marinelli, Mattia
Abstract	With increased penetration of distributed energy resources and electric vehicles (EVs), different EV management strategies can be used for mitigating adverse effects and supporting the distribution grid. This study proposes a robust multi-objective methodology for determining the optimal day-ahead EV charging schedule while complying with unbalanced distribution grid constraints. The proposed methodology considers partially competing objectives of an EV aggregator and the respective distribution system operator, and applies a fuzzy-based mechanism for obtaining the best-compromise solution. The robust formulation effectively considers the errors in the electricity price forecast and its influence on the EV schedule. Moreover, the impact of EV reactive power support on objective values and technical parameters is analysed both when EVs are the only flexible resources and when linked with other demand response programmes. The method is tested on a real Danish unbalanced distribution grid with 35% EV penetration to demonstrate the effectiveness of the proposed approach. It is shown that the proposed formulation guarantees an optimal EV cost as long as the price uncertainties are lower than the aggregator's conservativeness degree, and that EV reactive power improves local conditions without significantly affecting the EV cost.
Starting Page	4031
Ending Page	4040
Page Count	10
ISSN	17518687
Volume Number	11
e-ISSN	17518695
Issue Number	Issue 16, Nov (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/11/16
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2017.0309
Journal	IET Generation, Transmission & Distribution
Publisher Date	2017-06-30
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Combinatorial Mathematics Distributed Energy Resources Distribution Network Distribution System Operator Electric Vehicle Electricity Price Forecast EV Aggregator EV Management Strategy EV Reactive Power Support EV Schedule Flexible Unbalanced Distribution Grid Forecasting Theory Fuzzy Set Theory Fuzzy-based Mechanism Objective Value Optimal Day-ahead EV Charging Schedule Power Distribution Economics Power Generation Scheduling Power Grid Power System Economics Power System Managemen Power System Operation Robust Multiobjective PQ Scheduling Technical Parameter Transportation Unbalanced Distribution Grid Constraint
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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