Abstract
In this paper, the variable scaling hybrid differential evolution (VSHDE) used to solve the large-scale static economic dispatch problem. Different from the hybrid differential evolution (HDE), the concept of a variable scaling factor is used in the VSHDE method. The variable scaling factor based on the 1/5 success rule of evolution strategies (ESs) is embedded in the original HDE to accelerate the search for the global solution. The use of the variable scaling factor in the VSHDE can overcome the drawback of the fixed and random scaling factor used in HDE. To alleviate the drawback of the penalty method for equality constraints, the repair method is proposed. One 40-unit practical static economic dispatch (SED) system of Taiwan Power Company is used to compare the performance of the proposed method with HDE. Numerical results show that the performance of the proposed method combining with the repair method is better than the other methods.
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