Krill Herd algorithm solution for the economic emission load dispatch in power system operations

Abstract

This paper presents an effective Krill Herd optimization technique to solve complex Economic Emission Load Dispatch problems having valve-point loading effect of thermal generating units satisfying different power equality and inequality constraints. Now-a-days due to several environmental concerns, minimizing operating costs of thermal power plants is not only the criterion in the power system operations. In this paper, fuel cost and pollutants emission functions are considered together and formulated as a multi-objective optimization problem. The objective function for Economic Load Dispatch and Economic Emission Dispatch are assumed to be a quadratic non-linear one. So the overall objective function for Economic Emission Load Dispatch is nonlinear and complex in nature. Numerical results for two test systems have been presented to illustrate the performance of the proposed method. The comparative performance analysis with some of the recently published methods demonstrates the capabilities of the proposed approach to find accurate and feasible optimal solutions for practical Economic Emission Load Dispatch problems.