Int. Jour. of App. Sc. and Eng. (IJASE) 2 (2) : Dec 2014, 91-101
© 2014 New Delhi Publishers. All rights reserved.
2
NARMA-L2 controller for five-area load frequency
control
Priyanka Sharma
Department of Electrical Engineering, Maharishi Dayanand University
Abstract
This paper investigates the load-frequency control (LFC) based on neural network
for improving power system dynamic performance. In this paper an Artificial Neural
Network (ANN) basedcontroller is presented for the Load Frequency Control (LFC)
of a five area interconnected power system. The controller is adaptive and is based on
a nonlinear auto regressive moving average (NARMA-L2) algorithm. The working
of the conventional controller and ANN based NARMA L2 controllers is simulated
using MATLAB/SIMULINK package.. The Simulink link results of both the controllers
are compared.
Keywords: Area Control Error (ACE), Artificial Neural Network (ANN), Genetic
Algorithm (GA), Load Frequency Control (LFC), Artificial Neural Network (ANN)
The organizations are responsible for providing electrical power with great reliability,
availability and efficiency. In present time the demand for electrical power and load is not
constant but kept on changing. It becomes necessary to change power generations according
to load perturbations. A power system consists of a number of interconnected subsystems. For
each subsystem it becomes compulsory to fulfill the requirements usually include matching
system generation to system load and the associated system losses and then regulating system
frequency and tie line power exchanges. This is usually known as load frequency control, also
called Automatic Generation Control (AGC) problem and is very important in the operation
of power systems [1, 2]. The main function of AGC is to maintain the real frequency and
the desired power output (megawatt) in the interconnected power system and to control the
change in tie line power between control areas.
To maintain the system at normal operating state different types of controllers based on
classical and modern control theories have been developed [3-5]. The conventional controller
used for Load Frequency Control is integral controller. The integrator gain is set to a level such
that relation between fast transient recovery and low overshoot in the dynamic response of the
overall system can be maintained [6-7]. But the main disadvantage of this type of controller is