ANALYSIS OF POWER SYSTEM STABILITY AT DUYEN HAI THERMAL POWER PLANT, VIETNAM

Abstract

When the power system operates, instability will cause political, technical, and economic damage. Therefore, analyzing the dynamic
stability of the system is extremely important. The power system can recover to its original state and achieve static stability if appropriate operating methods are applied for each situation when an incident occurs, such as isolating the fault point, shedding loads, and adjusting the generator excitation. The paper uses MATLAB Simulink to simulate the process before and after the incident to restore the power system to its stable state. The results evaluate the fluctuations in the generator speed, the generator’s electromagnetic moment, and the power deviation angle. At that time, the parameters of the power system, including voltage, current, power, and frequency, may fluctuate. The oscillation level depends on several parameters, such as location and time. Therefore, the above parameters can affect the power quality, causing damage to the equipment. In this article, MATLAB Simulink is used to simulate the states to propose measures to stabilize the power system when the Duyen Hai Thermal Power Plant operates and combines the use of SCADA system to control, monitor, and collect operational data to increase the reliability of power supply.