Automatic Generation Control of Thermal-Thermal-Hydro Power Systems with PID Controller Using Ant Colony Optimization

Automatic Generation Control of Thermal-Thermal-Hydro Power Systems with PID Controller Using Ant Colony Optimization

Jagatheesan Kaliannan (Mahendra Institute of Engineering and Technology, India), Anand Baskaran (Hindusthan College of Engineering and Technology, India) and Nilanjan Dey (Jadavpur University, India)
DOI: 10.4018/978-1-5225-1671-2.ch023
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Abstract

In this work, Artificial Intelligence (AI) based Ant Colony Optimization (ACO) algorithm is proposed for Load Frequency Control (LFC) of interconnected multi–area hydrothermal power systems. Area 1&2 are thermal power systems and area 3 is a hydro power system, all the areas are interconnected through the appropriate tie-line. Thermal and hydro power plants are applied with reheat turbine and electric governor respectively. Investigated power system initially applied with conventional Proportional-Integral (PI) controller and controller parameters are optimized by using trial and error method considering Integral Time Absolute Error (ITAE) objective function. After that, the system is equipped with Proportional – Integral – Derivative (PID) controller and controller parameters are optimized by using ACO algorithm with ITAE objective function. The superiority of the proposed algorithm has been demonstrated by comparing conventional controller. Finally, The Simulation results of multi-area power system prove the effectiveness of the proposed optimization technique in LFC scheme and show its superiority over conventional PI controller.
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1. Introduction

The LFC of multi-area power system mechanism, balance the total power generation with fluctuated load to maintain the frequency deviation within the specified/scheduled value. This power balance is achieved by means of controlling prime mover, to match load variations through the control of load reference in selected generating unit. Different types of LFC schemes have been developed from the past few decades and recent years (Jagatheesan and Anand, 2014a; Jagatheesan and Anand, 2014b; Jagatheesan, et al. 2014; Hassan, et al. 2014; Padhan, et al. 2014; Roy, et al. 2014; Francis and Chidambaram, 2015; Zare, et al. 2015; Chidambaram and Paramasivem, 2012; Dash, et al. 2015; Sahu et al. 2015: Dey, et al. 2013; Samanta, et al. 2013; Chakraborty, et al. 2013; Dey, et al. 2014; Azar and Serrano, 2014; Azar and Vaidyanathan, 2015; Zhu and Azar, 2015; Hassanien, et al. 2014). Conventional and classical controller based power systems are getting trouble while achieving power balance during the sudden load disturbance.

The main of the Load Frequency Contro(LFC) or Automatic Generation Control (AGC) is to maintain power balance between load with generation and keep the system parameters with in the specified limit during sudden/ continuous load varations. From the literature, it is clearly shows that many control, optimization techniques and controllers are developed and implementd in multi-area interconnected power systems(Hassan, et al. 2014; Padhan, et al. 2014; Roy, et al. 2014; Francis and Chidambaram, 2015; Zare, et al. 2015; Chidambaram and Paramasivem, 2012; Dash, et al. 2015; Azar and Serrano, 2014; Azar and Vaidyanathan, 2015; Azar and Zhu, 2015; Zhu and Azar, 2015; Azar and Serrano, 2015; Hassanien, et al. 2015; Jagatheesan and Anand, 2012; Jagatheesan, et al. 2014; Ying-Tung Hsiao, et al. 2004).

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