Decentralised Pid Load Frequency Controller Design Based on Interaction Margin

Abstract

The decentralised load-frequency controller design problem concerned is translated into controller design for a multi-input multi-output (MIMO) control system.

It is shown that, subject to condition based on the structured singular values, each local controller can be designed independently. The stability condition for the overall system can be stated as to achieve a sufficient interaction margin and a sufficient gain and phase margin defined in classical feedback theory during each independent design.

It is demonstrated by computer simulations that within this general framework, PID local controllers can be designed to achieve satisfactory performances for a sample two-area power system.