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2012
Presentation
Title
Impact of frequency control supply by wind turbines on balancing costs
Title Supplement
Presentation held at European Wind Energy Conference and Exhibition, EWEC 2012, Copenhagen
Abstract
The introduction of an optional market premium in the revision of the German Renewable Energies Act (EEG) gives renewable energy sources(RES) the possibility to participate in control reserve markets. Though the reform of the EEG has set the legislative framework for the integration of wind farms into the existing market structures, which led to the successful integration in power exchange markets, wind farms have not yet participated in control reserve markets in Germany due to unfavorable market conditions and unresolved problems with the market regulations.The following study is assessing the economic impact of wind turbines participating in control reserve markets under different parameters. The assessment determines the maximum cost saving potential of wind turbines participating in secondary and tertiary control reserve markets. Results show that under current market conditions cost saving potentials can be achieved within the given scenarios. This will lead to decreasing balancing costs.In the first part (chapter 4 & 5) of the study it is explained how the offers from wind farms can be calculated. In order to bid on control reserve markets the wind park operator has to calculate an offer, which is based on a defined security level for the forecast. Therefore the operator will use probabilistic forecasts to calculate the offerable amount of control reserve. In the second part (chapter 6) these offers are entered into existing control reserve dispatch lists. The economic impact is evaluated as the difference between two scenarios. One that will serve as the reference scenario without wind turbine participation and one that includes the bids from wind farms. By this means different parameters are examined. This includes the variation of the security level, changes in the block length of control reserve products, bidding for positive and negative products and differences in the mechanism to proof the provision of energy from controlreserves for intermittent producers. Results show that cost saving potentials can reach up to 21 % in tertiary control reserve market and up to 24 % on secondary control reserve market.
File(s)
Rights
Under Copyright
Language
English