Comparative Analysis of Load Frequency Control Problem of Multi Area Deregulated Power System Using Soft Computing Techniques.

Abstract

It is very challenging to obtain theoptimumload frequency control (LFC) of entirepower system with the emerging trend of power systems. Traditional centralized LFCmethods are not adaptive to modern power systems because of the development of distributed sources& restructured power system with multi-stakeholders. This paper presents a load frequency control (LFC) of multi-areapower system in deregulated environment using soft computing techniques.The main objective of LFC in deregulated system is to establish frequency regulation services i.e., restore the frequency to its nominal value as quickly as possible and minimize tie-line power flow oscillations between neighboring control areas and also monitoring the load matching contracts. In order to achieve the objectives of LFC, gains of PID controller need to be optimized.Soft computing techniques are used for optimization purpose.The system has been simulated under MATLAB/Simulink and results confirm that the controllers designed using soft computing techniques are capable of keeping the frequency deviation in the specified range and maintain the tie line power exchange as per the contractual conditions.A comparative analysis of load frequency control using Integral controller, auto tuned PID controller, GA based controller, PSO based controller and ANFIS controlleris presented in this paper.