Open AccessCoordinated operation strategy of hybrid storage system in wind power peak shaving scenarios
Author(s) -
Wu Jun,
Qiao Ying,
Lu Zongxiang,
Li Wenqi,
Sun Liang
Publication year - 2017
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2017.0530
Subject(s) - peaking power plant , computer science , automotive engineering , wind power , environmental science , power (physics) , electric power system , electrical engineering , engineering , physics , quantum mechanics
With more wind power being integrated into the power grid, its random and intermittent output has brought great impact on wind power utilisation. The new type of liquid compressed air energy storage has the advantages of high energy density, large capacity and free from geographical constraints. It can be used as a peak shaving device for wind farms to improve the accommodation of wind power, but its flexibility is relatively limited. Although electrochemical storage is flexible, large capacity requirements can lead to large costs when used for peak shaving. Considering the power and electricity capacity characteristics of different storage system as well as the output characteristics of wind farm, a hybrid storage system consisting of a new type of liquid compressed air energy storage and electrochemical storage is proposed for peak shaving of wind farm. Considering the power efficiency characteristics of storage system, a linear model for different storage is established. Then a mixed integer programming model is established to maximise the return of a wind farm under the cooperation mode of hybrid storage system in a wind farm. A case study shows that the proposed hybrid storage coordinated operation strategy can effectively improve the wind farm income and the accommodation of wind power.