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An Analysis of Dynamic Economic Dispatch Using Search Space Reduction Based Gravitational Search Algorithm

Authors: K. C. Meher, R. K. Swain, C. K. Chanda


This paper presents the performance analysis of dynamic search space reduction (DSR) based gravitational search algorithm (GSA) to solve dynamic economic dispatch of thermal generating units with valve point effects. Dynamic economic dispatch basically dictates the best setting of generator units with anticipated load demand over a definite period of time. In this paper, the presented technique is considered that deals an inequality constraints treatment mechanism known as DSR strategy to accelerate the optimization process. The presented method is demonstrated through five-unit test systems to verify its effectiveness and robustness. The simulation results are compared with other existing evolutionary methods reported in the literature. It is intuited from the comparison that the fuel cost and other performances of the presented approach yield fruitful results with marginal value of simulation time.

Keywords: dynamic economic dispatch, gravitational search algorithm, Ramp rate limits, dynamic search space reduction strategy, valve-point effects

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