Abstract
A rising number of industrial companies are aiming to increase the share of renewable generation in their electricity consumption, in order to decrease electricity costs or to fulfill portfolio requirements. This can be achieved by using pv or wind generation systems, which are directly connected to the industrial consumer. The volatility of the renewable generation can be balanced by employing an electricity storage system. The paper presents an MILP optimization model for the direct supply of an industrial consumer by a wind farm, coupled with a storage system. The model optimizes the dispatch of the storage system in order to minimize both the energy component as well as the capacity component of the consumers electricity cost. A case study is presented using the grid tariffs in Germany for two different legal scenarios and two load profiles. The operation of a modular compressed air energy storage system is analyzed and the optimal dimensions of the storage power and capacity are determined, for the proposed system.
Highlights
A rising number of industrial customers are aiming to increase the share of renewable generation in their electricity consumption, in order to decrease electricity costs or to fulfil portfolio requirements [1]
The annual savings for the storage operation are calculated in comparison to the base case including wind generation (Base Case + Wind) in order to estimate the effect stemming from the storage operation
The Break-Even Capital Costs (BECC) for legal scenario 1 are presented in Fig. 2 for load profile 21 and in Fig. 3 for load profile 9†
Summary
A rising number of industrial customers are aiming to increase the share of renewable generation in their electricity consumption, in order to decrease electricity costs or to fulfil portfolio requirements [1]. Wind power producers are looking for new ways to sell their energy generation, after the termination of feed-in tariffs. One possibility are power purchase agreements (PPA), which are concluded directly between customer and producer [1]. In order to match the renewable generation and the customers demand more effectively, electricity storage systems can be employed. There is no quantification of the customer benefit of the storage operation as well as guidelines for optimal storage system dimensions. The authors introduce these analyses based on a case study for Germany in this paper
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