Jamal Alnasseir

DOI Number
First page
Last page


Over the past 50 years, modern electrical systems have become more complex, as they overrun the geographical boundaries of neighboring countries. The problem is that the power system faces many challenges, because it is exposed to difficult operating conditions. The phenomenon of voltage instability is the most frequent phenomenon, and this can lead to the collapse of the power system. To avoid power outages in the system (especially in blackout situations), the power system must be analyzed in order to maintain voltage stability in the expected difficult operating conditions. The main objective is to determine the maximum load capacity of the system and the causes of voltage instability. The voltage instability problem is related to the nature of nonlinear loads, so different load characteristics must be taken into consideration when analyzing voltage stability.

This study aims to discover the maximum load capacity required by using the continuous power flow method (CPF) in the studied network. Then, the performance of this network using a Flexible Alternating Current Transmission System (FACTS) will be utilized. FACTS systems present a promising solution in improving the voltage stability by improving the power transmission capacity and controllability of the parameters of the existing power networks. This study will be conducted on a reference network platform under normal working conditions, then installation of one of the FACTS systems will show its effect on improving voltage stability. The continuous power flow method will be used to find PV curves, which in turn will help to determine the conditions of maximum loading while maintaining stability, and identify the bus bar with the smallest voltage, on which the flexible AC systems will be installed. The software environment MATLAB/PSAT will be used for modeling and simulation.


Voltage stability, Continuation Power Flow (CPF), maximum load conditions, Flexible Alternating Current Transmission System (FACTS), Thyristor-Controlled Series Capacitor (TCSC)

Full Text:



N. Karuppiah1, S. Muthubalaji, S. Ravivarman, Md. Asif and A. Mandal, "Enhancing the performance of Transmission Lines by FACTS Devices using GSA and BFOA Algorithms", Int. J. Eng. Techn., vol. 7, no. 4.6, pp. 203–208, 2018.

A. Jalali and M. Aldeen, "Novel Continuation Power-flow Algorithm", In Proceedings of the IEEE International Conference on Power System Technology (POWERCON), 2016, p. 16487968.

M. Gudavalli, H. Emulapalli and K. Cherukupall, "Voltage Stability Analysis Using Continuation Power Flow Under Contigency", J. Theor. Appl. Inf. Technol., vol. 99, no. 10, pp. 2373–2383, May 2021.

S. B. Bhaladhare, "Improving Voltage Stability by Using Facts Devices", IASET: J. Electr. Electron. Eng. (IASET: JEEE), vol. 1, no. 1, pp. 1–10, 2016.

S. D. Patel, H. H. Raval and A. G. Patel, "Voltage Stability Analysis of Power System using Continuation Power Flow Method", Int. J. Technol. Res. Eng., vol. 1, no. 9, pp. 763–767, May 2014.

N. Fnaiech, A. Jendoubi and F. Bacha, "Voltage Stability Analysis in Power System Using Continuation Method and PSAT Software", In Proceedings of the 6th international Renewable Energy Congress (IREC), Tunis, 2015, pp. 1–6.

S. Greene, I. Dobson and F. L. Alvarado, "Sensitivity of the loading margin to voltage collapse with respect to arbitrary parameters", IEEE Trans. Power Syst., vol. 12, no. 1, pp. 262–272, Feb. 1997.

Leonardo L. Grigsby, Power System Stability and Control, CRC press, 3rd edition, 2012.

V. Chauhan, B. Singh and J. Bala, "Enhancement of Static Voltage Stability using TCSC and SVC", Int. J. Sci. Eng. Res., vol. 8, no. 4, pp. 127–130, April 2017.

J. M. Teixeira da Silva Marques da Cruz, "Extension of Continuation Power Flow to Incorporate Dispersed Generation", doctor thesis, Lisbon technical University, 2016.

R. Mohan and R. K. Varma, Thyristor-based FACTS Controllers for Electrical Transmission Systems, John Wiley & Sons, 2002.

I. G. Adebayo, I. A. Adejumobi and O. S. Olajire, "Power Flow Analysis and Voltage Stability Enhancement Using Thyristor Controlled Series Capacitor (TCSC) Facts Controller", Int. J. Eng. Adv. Technol. (IJEAT), vol. 2, no. 3, pp. 100–104, Feb. 2013.

T. Van Cutsem, "A Method to compute Reactive Power Margins with respect to Voltage Collapse", IEEE Trans. Power Syst., vol. 6, no. 1, pp. 145–156, Feb. 1991.

C. Sharma and M. G. Ganness, "Determination of the Applicability of using Modal Analysis for the Prediction of Voltage Stability", In Proceedings of the IEEE/PES Transmission and Distribution Conference and Exposition, 2008, pp. 1–7.

Y. Zhang, S. Rajagopalan and J. Conto, "Practical Voltage Stability Analysis", In Proceedings of the IEEE PES Power and Energy Society General Meeting, 2010, pp. 1–7.

O. I. Adebisi, I. A. Adejumobi, P. E. Ogunbowale and O. O. Ade-Ikuesan, "Performance Improvement of Power System Networks Using Flexible Alternating Current Transmission Systems Devices: The Nigerian 330 kV Electricity Grid as a Case Study", LAUTECH J. Eng. Techno., vol. 12, no. 2, pp. 46–55, 2018.

S. Kumar, "Implementation of TCSC on a Transmission Line Model to analyze the variation in Power Transfer Capability", Int. J. Res. (IJR), vol. 1, no. 8, pp. 1091–1098, Sept. 2014.

J. P. Sai Kumar Reddy and P. Janga, "Power Flow Improvement in Transmission Line Using UPFC", Int. J. Electron. Commun. Technol. (IJECT), vol. 7, no. 4, pp. 9-12, 2016.


  • There are currently no refbacks.

ISSN: 0353-3670 (Print)

ISSN: 2217-5997 (Online)

COBISS.SR-ID 12826626