THE MODELLING OF ELECTRIC POWER SYSTEMS ON THE STATE SPACE AND CONTROLLING OF OPTIMAL LQR LOAD FREQUENCY

Year 2009, Volume: 9 Issue: 2, 977 - 982, 25.10.2010

Adnan Kakıllı , Hüseyin Çalık

Abstract

THE MODELLING OF ELECTRIC POWER SYSTEMS ON THE STATE SPACE AND CONTROLLING OF OPTIMAL LQR LOAD FREQUENCY

Keywords

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THE MODELLING OF ELECTRIC POWER SYSTEMS ON THE STATE SPACE AND CONTROLLING OF OPTIMAL LQR LOAD FREQUENCY

Abstract

The modelling of electric power systems on the state space and an optimal control system known as Linear
Quadratic Regulator (LQR) for designing the load frequency control system are realized in this paper. In order
to obtain high quality electric energy on electric power systems, the fluctuations on voltage  and frequency must
be decreased as much as possible. The frequency sensitivity of the system must be reduced to minimum level
against to load changes. To obtain minimum frequency sensitivity against to load changes, an optimal control
known as Linear Quadratic Regulator ( LQR) is designed. In the study, the simplified and block diagram of the
electric power system is employed.  By using this diagram, the state equations for the power system are obtained
on the state space. In the load frequency control of power system, control system via pole-placement and 
optimal LQR control method known as modern control with high reability rate are used. The proposed optimal
LQR load frequency has been compared with control system via pole-placement. Load frequency control system
of electric power system has been developed designed by using MATLAB/SIMULINK.

Keywords

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