Relay Feedback Identification based Load Frequency Control and Controller Design

Kunduru Laxmi Pavan Kumar Reddy,Dola Gobinda Padhan,S Tummala,S Kosaraju,S Singh,P Bobba

doi:10.1051/e3sconf/202018401043

Abstract

The main objective of power system operation and control is to maintain the continuity of supply with required quality and reliability. In power system operation one of the issue is Load frequency control. Generally, the dynamics of the system ( i.e the over all dynamics of governor ,turbine, load and machine) for isolated or inter-connected power system is of higher order. The controller design for a higher order system is a tedious process. In order to over come this difficultly relay feedback identification approach has been adopted. In this approach the higher order system has been reduced to lower order system by the method of IMC-PID tuning control. Robust controller has been design for identified model for single area power system in order to achieve satisfactory closed loop performance. The same concepts have been readily extended to multi area power system.

Highlights

The problem of control the real power output of generating units in response to changes in system frequency and tie-line power inter change with in specified limits is known as load frequency control [1]
The concept adopt from IMC method for load frequency controller design[2]
The IMC structure shown in fig-2, where P(s) is to be controlled, is the plant model,Q(s) is IMC-controller were Design

Summary

Introduction

The problem of control the real power output of generating units in response to changes in system frequency and tie-line power inter change with in specified limits is known as load frequency control [1]. The objective of the control strategy in a power system is to generate and deliver power in an interconnected system as economically and reliably as possible while maintaining the frequency and voltage within permissible limits [4,5].To maintain stability of system were required best & simple control method like IMC-PID Tuning, it is most used method in industrial controller in the process of maintain stability of real power by controlling load frequency variation [6,7,8,9]. Step-3: To cancel the poles the condition to follows: Step-4: Total close loop response can be determine

IMC- DESIGN

Numerical Analysis

SIMULATION MODEL

Conclusion