Improved Dynamic Performance in Interconnected Power System Using Secondary Frequency Control

Subject Areas : International Journal of Smart Electrical Engineering

Bahador Fani ¹ , Farhad Mesrinejad ² , Somaye Yaghoubi ³ , HassanHaes Alhelou ⁴

1 - Najafabad Branch, Islamic Azad University
2 - Department of Electrical Engineering, Tiran Branch, Islamic Azad University, Tiran, Isfahan, Iran
3 - Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
4 - Department of Electrical and Computer Systems Engineering, Monash University, Melbourne, VIC, Australia,

Received: 2022-11-27 Accepted : 2023-01-15 Published : 2023-07-01

Keywords: Load frequency control, state space, two-area power system, reheater,

Abstract :

Load changes affect the frequency of electrical networks. Frequency stabilization is very important due to the increasing penetration of renewable energy sources in power systems. Load frequency control (LFC) is used in the power system, so that the frequency of the programmed system and the power of the connection line of an interconnected area are within the specified limits. To improve the dynamic performance of the power system and control the frequency stability, LFC is used in power systems. The main task of LFC is to keep the system frequency according to the specified nominal value and to maintain the correct amount of exchange power between the control areas. In this paper, load frequency control in two-area power system is studied and simulated. Each area has a steam generating unit with a reheat steam turbine. The system equations are expressed in the state space and the system model is determined based on the transfer function. The simulation results have been obtained using Matlab software. The simulation results show the effect of Richter's parameters on the transient dynamic behavior of the system.