Developing instructional models on automatic load frequency control of power system

Dissertant

al-Azzawi, Umar Kamil Dahham

University

University of Technology

Faculty

-

Department

Department of Electrical Engineering

University Country

Iraq

Degree

Master

Degree Date

2006

English Abstract

The primary objective of an electrical power system is to generate and deliver power as economically and reliably as possible and maintain balanced sinusoidal voltages with actually constant magnitude and frequency.

The aim of this work is to study the low frequency oscillation of a power system when subjected to a small iota perturbation and also to examine the effect of using automatic load frequency control to improve this oscillation to keep the system stable.

This work is intended to study an Optimum Linear Regulator (OLR) technique for load.....frequency control problem of two areas reheat steam turbine, and two area hydro thermal systems.

(01.R) is presented to evaluate the optimum gain and the tie line power deviation and 1 frequency deviation.

Also in this work we have tried to apply effective dedicated online control systems to two equal power systems connected by a long distance tie-line.

When large interconnected systems are linked electrically to others by means of tie-lines, the power transfer between them is usually decided by mutual agreement and the power is controlled by regulators.

On the other side it is a desired feature to achieve a better frequency constancy, which has been obtained by a controller, activated by frequency-bias constant.

An approximately straight line power frequency characteristic also has been maintained by governor speed regulation parameter in case any perturbation in frequency is caused by load change in any one of the areas.

To maintain the real power flow and single frequency in tie-line power system, the governor has been manipulated by Automatic Generation Control (AGC) action.

For this work various, integral (1) proportional plus integral (PI), and proportional plus integral plus derivative (PID) controllers have been tried.

Computer program is developed to determine the constant \~end back controller matrix using language of the package (MATLAB-7).

The application of the proposed controller is considered through simulation studies of two— area power system models.

The numerical results show that the gas turbine, non-reheat steam turbine and hydro turbine give faster response than reheat steam turbine, increasing the load experience results an increasing in deviation in state variable the numerical method presented is very stable and efficient.

In the present study, a mathematical model has been used for calculation of optimum gain by using the numerical procedures of Keewatin equation and Rung-kata method used to evaluate the tie-line power deviation and frequency deviation.

A computer program has been developed depending on the above mentioned procedure to perform the calculation of optimum gain and the deviation tie -line power and frequency comparison of simulation results of model and data obtained from the previous studies has been discussed.

Main Subjects

Electronic engineering

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-305991