[PDF] Conference Paper: How can the use of electric vehicles affect the curtailment of renewable generation?

Title:

How can the use of electric vehicles affect the curtailment of renewable generation?

Authors:

K. Dietrich , J.M. Latorre , L. Olmos , A. Ramos

Keywords:

Wind Energy, Electric Vehicles, Unit commitment

Research topics

Short-Term Operation, Market Bidding and Operating Reserves
Medium-term tactical planning

Abstract:

Facing climate change has made governments galvanize and implement actions to stem it. Di±cult tasks have to be managed: among them is the integration of renewable energies into electric energy systems. This lets emerge problems for the system operation most notably during o®-peak hours (nights and weekends) when high levels of generation from renewable energies encounter low consumption levels.Curtailing a part of this generation may be necessary to maintain system stability. Additional flexible consumers are needed to bear these circumstances without curtailing valuable energy. The intended massive introduction of electric vehicles could kill two birds with one stone. Electric vehicles can act as additional consumers during off-peak hours and absorb a part of the high wind or solar production rates. Electric vehicles are also quite flexible as they may be connected to the grid during an important part of the day, especially during off-peak hours, when curtailments are more probable, and thus give enough flexibility to the system to decide when to charge them. Furthermore, they help reducing emissions if the electricity mix includes even higher renewable energy shares. A model is used that is able to optimise the short-term operation of the electric system with electric vehicles. We analyse different renewable penetration scenarios for Spain for 2020 and study the profile of curtailed wind energy. Then, these scenarios are analysed introducing electric vehicles. Charging electric vehicles can happen either taking into account the overall system conditions in each day or in a predefined schedule. Results on reduction of curtailed wind generation and profiles as well as charging hours of electric vehicles and cost savings are presented.

Reference:

6th Conference on Energy Economics and Technology - ENERDAY 2011. Dresde, Alemania. 8- Abril 2011

Publication date:

April 2011

Internal document reference:

IIT-11-093A

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