AGC issues in power system operation after deregulation using PI and PID controller

摘要

This paper deals with load frequency control of interconnected power system before and after the deregulation. In this work single area and two area concepts is considered. The major intention of Load Frequency Control is to sustain the power performance of electric generator within a specified area, due to which alters in frequency of the system and tie-line loading. Thus, Load Flow Controller assists in sustaining the frequency of the system and tie-line power performance with other areas within their specified limits. Mostly LFCs are initially comprises of an integral and PID controller. The gain of the controller is building put to a value that gives better response among fast transient recovery and low overshoot in the performance of the entire power system. The major focus of this dissertation work is on the controller to achieve good output frequency performances. LFC's for every area are mostly designed based on accessibility of frequency fluctuation of every area and tie line power fluctuation between areas. The proposed controller guarantees the stability of the overall closed loop system. Simulation responses for a real two-area power system confirm the usefulness of the proposed LFC and proved its superiority without using controller. So by using MATLAB simulation tools a method is proposed for fine tuning of integral controller.