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Retail Pricing: A Bilevel Program for PEV Aggregator Decisions Using Indirect Load Control
KTH, School of Electrical Engineering (EES), Electric power and energy systems. Comillas University, Spain.
2016 (English)In: IEEE Transactions on Power Systems, ISSN 0885-8950, E-ISSN 1558-0679, Vol. 31, no 1, 464-473 p.Article in journal (Refereed) PublishedText
Abstract [en]

Charging schedules of plug-in electric vehicles (PEVs) coordinated by an aggregating agent may increase system efficiency of allocating generation, transmission and distribution resources. Decentralized self-scheduling and local charging control appear to be preferred by vehicle manufacturers and PEV drivers who are simultaneously concerned about the longevity and reliability of their energy storage systems. In such a setting, the aggregator would have to determine energy retail prices as means to indirect load control. This paper proposes a mathematical program with equilibrium constraints optimizing the aggregator's decisions. It endogenously determines the profit-optimal price level subject to the cost minimizing charging schedule of the final customers, who are reacting to a combination of retail price signals and distribution use-of-system network charges. This active response follows an affine demand-price relationship, which is individually parametrized for each vehicle by local information of vehicle characteristics and mobility pattern. The proposed program is applied to two cases: 1) a small case study with 3 vehicles, which highlights the model functionality with detailed hourly information per vehicle; 2) a large-scale fleet of 1000 vehicles provides insights on computational burden. Numerical results indicate that adequate competition in the retail market is necessary to limit the aggregator's monopolistic profitability. Finally, sensitivity runs show dependency on the individual's willingness to pay, the cost of alternative fueling opportunities and minimum state-of-charge requirements.

Place, publisher, year, edition, pages
IEEE , 2016. Vol. 31, no 1, 464-473 p.
Keyword [en]
Bilevel optimization, optimal charging schedules, plug-in electric vehicle aggregator, retail tariffs for electricity
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-180968DOI: 10.1109/TPWRS.2014.2379637ISI: 000367298100046OAI: oai:DiVA.org:kth-180968DiVA: diva2:898625
Note

QC 20160128

Available from: 2016-01-28 Created: 2016-01-26 Last updated: 2016-02-25Bibliographically approved

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Momber, Ilan
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