PERFORMANCE OF LOAD FREQUENCY CONTROL IN A TWO AREA INTERCONNECTED SYSTEM USING MATLAB SIMULATION

The main objective of this paper is to study the load frequency control problem associated in single and Two area electrical power systems. At first uncontrolled system is studied and then improvement of its response is learnt on the application of integral controller. Automatic generation control (AGC) is usually used to regulate with these deviations in frequency, voltage and which reduce to an acceptable level. AGC is consists of two parts which are load frequency control (LFC) and automatic voltage regulator(AVR). In systems that are operating with their maximum rating, any increase in the load will cause generators to fall, or in best cases suppliers will have to load shed some unimportant loads to recover back sufficient power supply to the grid. Any load change within the area has to be met by generators in both the area. Thus it can maintain the constant frequency operation irrespective of load change. In this paper, ALFC is evaluated using MATLAB and SIMULINK library for single area and multi area interconnected system. SIMULINK is used to analyze for different case studies in two area interconnected system and also analyzed with PID controllers and their performance responses are analyzed for different load change conditions.