A Hybrid Sine Cosine Algorithm with SQP for Solving Convex and Nonconvex Economic Dispatch Problem

Muhammad Imran Babar,Saqib Fayyaz,Aftab Ahmad

doi:10.22581/muet1982.2001.04

Abstract

ED (Economic Dispatch) is one of the major problems of power system operation. The aim of ED problem is the efficient utilization of resources to provide the demanded power while generating cost turns out to be minimum and no constraint is violated either equality or inequality. The ED optimization problem, is necessary because of limited resources, high fuel cost and ever growing demand of power. This paper presents solution to convex and nonconvex ED problems using a novel HSCA (Hybrid Sine Cosine Algorithm). The proposed HSCA technique enhances the exploration capabilities of SCA (Sine Cosine Algorithm) by equipping it with mutation and crossover operators from DE(Differential Evolution) algorithm. DE algorithm introduces diversity in the operation of SCA enabling it to avoid local minima and premature convergence. To ensure precise and accurate optimum tracking results are finally refined by SQP (Sequential Quadratic Programming) algorithm. The high feasibility and applicability of proposed technique has been tested and validated on 13, 15 and 40 IEEE Standard test systems considering transmission losses and prohibited operating zones in “MATLAB 2014a”. Comparisons of results obtained from HSCA indicate significant improvement in convergence time and fuel cost as compared to the techniques reported in the literature.

Highlights

ED (Economic Dispatch) is one of the major problems of power system operation
The proposed HSCA is implemented to three ED problems to verify its feasibility
These three ED problems refer to three types of test systems to validate the proposed technique

Summary

Introduction

ED (Economic Dispatch) is one of the major problems of power system operation. The aim of ED problem is the efficient utilization of resources to provide the demanded power while generating cost turns out to be minimum and no constraint is violated either equality or inequality. Here has seen soaring competition in the Telectricity market propelled by de-regularization of industry and the rampant electricity demand since last decade In this scenario of ever increasing demand the electricity producers are left with the daunting task of meeting this demand at least cost to maximize profit. Fuel cost characteristics of thermal generators can be approximated by quadratic equations but the factual fuel cost characteristics of the fossil fuelfired plants exhibit a large number of nonlinearities due to VPLE (Valve-PointLoading Effect) and POZs (Prohibited Operating Zones) [1]. The valve operation makes the characteristic curve of the generating unit nonlinear and discontinuous

Methods

Results

Conclusion