Optimization of Automatic Generation Control and Economic Load Dispatch for Two Area Six Unit Interconnected Power System

Faeq Zwayyer,Afaneen Abbood,Jasim Hussein

doi:10.30684/etj.v39i10.2158

Abstract

This paper proposes an integrated Economic Load Dispatch (ELD) and Automatic Generation Control (AGC) for interconnected power systems. Based on their participation factor determined from the economic load dispatch calculation, each unit shares the total change in the same control region. In this study, two control areas are considered. Three thermal units are located in each control area. An integral controller (I) is only used for the AGC mechanism's secondary controller and is used for the primary controller for the ELD mechanism. An Improved Grey Wolf Optimizer (IGWO) technique is used to evaluate the optimum parameters of the integral controllers for primary and secondary controllers. An integral time square error (ITSE) has been used as the objective function to tune the suitability of the proposed controller gains. The simulation results demonstrate that the integrated AGC with ELD has the superiority in reducing the overshoot and fast steady state compared with AGC only.

Highlights

The main aim of automatic generation control in interconnected power systems is to maintain zero frequency deviation and balance the generated power with load demand [1]
A 0.05-p.u. step load perturbation (SLP) is applied to the first area at the t=0 to 400 s to show the efficiency of the I-grey wolf optimizer (GWO) in solving the system
To achieve the desired benefit of economic load dispatch, the integral time square error (ITSE) is used as an objective function to tune the parameters of the secondary controller, which operates as an automatic generation control (AGC) controller, as well as the parameters of the primary controller, which operates as a speed changer for the governor

Summary

Introduction

The main aim of automatic generation control in interconnected power systems is to maintain zero frequency deviation and balance the generated power with load demand [1]. In traditional automatic generation control (AGC), the frequency and power exchange deviations are combined into a single variable called area control error (ACE), which is used as an input to the conventional controller. The power system's primary goal is to maintain enough generation to satisfy the load at the lowest possible cost. This target must be accomplished to maintain the system frequency under reasonable limits. The stable and cost-effective operation of the integrated power grid is dependent on multiple layers of the automatic generation control system, which ensures that generator production corresponds to changes in electrical load demand.

Methods

Results

Conclusion