Unit Commitment and economic dispatch in micro grids
Keywords:
Micro grid, Unit commitment, Genetic algorithm, Priority list, Storage devices, Renewable sources, Distributed generation, Lambda iteration algorithmAbstract
As a result of the differences between classical large power grids and micro grids a new approach of the Unit Commitment (UC) and Economic Dispatch (ED) problem must be proposed. The high penetrations of renewable sources and distributed energy storage systems, as well as the possibility of working in a grid-connected or island mode are some of the main issues to cope with. Firstly the advantages and drawbacks of the use of the Lambda Iteration Algorithm (LIA) for solving de ED problem in a micro grid are discussed. In order to adapt the LIA to this context some modifications have been carried out. With regard to the Unit Commitment problem, a genetic algorithm with some novel specific operators has been designed. This algorithm is suitable to deal with different constraints and scenarios arising in a micro grid environment. In addition, a comparison between the different characteristics of the designed UC algorithm and the traditional Priority List (PL) method has been performed.
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