University of Khartoum

Load Frequency Control for a Two Area Power System

Load Frequency Control for a Two Area Power System

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Title: Load Frequency Control for a Two Area Power System
Author: Ahmed, Serien Hashim Ali
Abstract: In case of an interconnected power system, any small sudden load change in any of the areas causes the fluctuation of the frequencies of each area and also there is fluctuation of power in tie line. The main goals of Load Frequency control (LFC) are to maintain the real frequency, the desired power Output (megawatt) in the interconnected power system and to control the change in tie line power between control areas. So, a LFC scheme basically incorporates appropriate control system for an interconnected power system, which is having the capability to bring the frequencies of each area and the tie line powers back to original set point values or very nearer to set point values effectively after the load change. Analysis of single area power system is carried out under the effect of disturbance using different LFC loops. Load Frequency Control (LFC) strategies for two area power system are obtained using different control techniques like Conventional integral controllers, all strategies are achieved but it takes long time and it’s hard to find the integral gain due to the change in the set point. To overcome the drawbacks of the conventional integral controller, linear quadratic regulator is used to give better static and dynamic responses. Since load as well as frequency and tie line power are dynamically changing, there is a need to a robust control and this is achieved using Fuzzy Logic Controller (FLC), the rules are carried out with respect to the variation in load to eliminate the error. Triangular membership function is used because it gives an easy way to form the rule base. All simulations are done using MATLAB/ Simulink library.
URI: http://khartoumspace.uofk.edu/123456789/25766
Date: 2017-10


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