scholarly journals Transient Stability Analysis of the IEEE-9 Bus System under Multiple Contingencies

2020 ◽  
Vol 10 (4) ◽  
pp. 5925-5932
Author(s):  
N. Anwar ◽  
A. H. Hanif ◽  
H. F. Khan ◽  
M. F. Ullah
Keyword(s):  
Stability Analysis ◽  
Power System ◽  
Transient Stability ◽  
System Analysis ◽  
Load Flow ◽  
Electric Power System ◽  
System Stability ◽  
Clearing Time ◽  
Bus System ◽  
Transient Stability Analysis

The determination of the transient stability of an electric power system is a crucial step in power system analysis. This paper investigates the transient stability of an IEEE-9 bus system consisting of three generators and nine buses. At first, a load flow analysis is conducted in order to determine the pre-fault conditions. Secondly, fault analysis is performed to analyze post fault conditions like the fast fault clearing time and load switching in order to determine the system stability. For transient stability analysis, Euler and Runga methods are compared and applied on the frequency and rotor angle of the system to analyze the system variations under different fault conditions. The simulations were done on the Power World Simulator (PWS) software. It is concluded that Critical Fault Clearing Time (CFCT) is a very important factor in keeping the power system within the stability bounds. A slight increase in Clearing Time (CT) from the critical value causes un-synchronism.

scholarly journals Transient Stability Assessment of IEEE 9-Bus System Integrated Wind Farm

2021 ◽  
Vol 335 ◽  
pp. 02006
Author(s):  
Ahmad Adel Alsakati ◽  
Chockalingam Aravind Vaithilingam ◽  
Jamal Alnasseir
Keyword(s):  
Power System ◽  
Wind Energy ◽  
Alternative Energy ◽  
Power Plants ◽  
Wind Farm ◽  
Transient Stability ◽  
Load Flow ◽  
System Stability ◽  
The Stability ◽  
Bus System

The use of wind energy is increased due to the high demand for sustainable energy. The penetration of wind energy in electrical networks might have several effects on load flow and power system stability. In this research, the transient stability of the IEEE 9-Bus system integrated with Doubly Fed Induction Generator (DFIG) is analyzed. Additionally, different penetration levels of a wind farm are considered. With a 5% penetration of wind energy, the maximum power angle of the synchronous generator is around 129 deg, which is quite similar to the existing system. In contrast, the power angle increases to 140 deg after adding more wind turbines with 15% wind farm penetration. Then, the system loses stability with a 25% penetration of wind energy. The results indicate that the high penetration of wind energy has a destabilizing impact on the studied network. Moreover, the location of the wind farm affects transient stability. This research intends to contribute towards assessing the stability of the power system integrated DFIG. Hence, this study will support the increase of using wind energy in power systems rather than conventional power plants and evaluate the stability to enable the reliability of alternative energy sources in the grid.

scholarly journals Dynamic stability improvement with integrated power plant scheduling method based on moment of inertia

2021 ◽  
Vol 926 (1) ◽  
pp. 012030
Author(s):  
Fitriani ◽  
I C Gunadin ◽  
A Suyuti ◽  
A Siswanto
Keyword(s):  
Power System ◽  
Dynamic Stability ◽  
Fault Location ◽  
System Analysis ◽  
Electrical Power ◽  
Stability Study ◽  
Electric Power System ◽  
System Stability ◽  
Electrical Power System ◽  
Clearing Time

Abstract Dynamic stability is one of the important aspects of maintaining the stability of an electrical power system as a whole. Dynamic stability study is the ability of the electric power system to return to the equilibrium point after a relatively small disturbance suddenly occurs for a long time. In this paper, we offer a method of rescheduling the generator to improve system stability by looking at the critical clearing time (CCT). Changes in the CCT value are due to changes in the load on each bus. The modelling of the IEEE 14 bus system is carried out with the help of the Simulink Power System Analysis Toolbox (PSAT) 2.1.10, which is integrated with the MATLAB R. 2016a program. The simulation results show that the CCT value decreases as the fault location gets closer to the main generator.

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