Open Access Open Access  Restricted Access Subscription or Fee Access

Voltage Instability Analysis on PV and QV Curves for Radial-Type and Mesh-Type Electrical Power Networks

Marizan Sulaiman(1), Ahmad Fateh Mohamad Nor(2*), Noor Ropidah Bujal(3)

(1) Universiti Teknikal Malaysia Melaka (UTeM), Malaysia
(2) Universiti Teknikal Malaysia Melaka (UTeM), Malaysia
(3) Merlimau Melaka Polytechnic, Malaysia, Malaysia
(*) Corresponding author



The analysis of voltage instability in electric power system is very crucial in order to maintain the equilibrium of the system. This paper presents the analysis of voltage instability of electric power system by using power-voltage (PV) curve and reactive power-voltage (QV) curve. This research focuses on the voltage instability analysis using PV and QV curves for radial-type and mesh-type power networks. For radial-type power network, the plotting of PV and QV curves will be done by using Graphical User Interface (GUI) based on MATLAB application software. In the other hand, the power flow analysis for mesh-type power network will be done by using Power World Simulator and the plotting of PV and QV curve will be done by using Microsoft Excel.
Copyright © 2015 Praise Worthy Prize - All rights reserved.


GUI; Power World Simulator; PV and QV Curves; Voltage Instability

Full Text:



P. Kundur, J. Paserba, V. Ajjarapu, G. Andersson, A. Bose, C. Canizares, N. Hatziargyriou, D. Hill, A. Stankovic, C. Taylor, T. Van Cutsem, V. Vittal, Definition and Classification of Power System Stability IEEE/CIGRE Joint Task Force on Stability Terms and Definitions, IEEE Transactions on Power Systems, vol. 19, n. 2, August 2004, pp. 1387 – 1401.

C. W. Taylor, Power System Voltage Stability (McGraw-Hill, Inc., 1994).

M. S. Chen, Energy Systems Research Center (University of Texas at Arlington, 1996).

H. L. Willis, Power Distribution Planning Reference Book (Marcel Dekker, Inc., 2004).

G.K. Morison, B. Gao, P. Kundur, Voltage Stability Analysis using Static and Dynamic Approaches, IEEE Transactions on Power Systems, vol. 8, n. 3, August 1993, pp. 1159 – 1171.

B. Gao, G.K. Morison, P. Kundur, Voltage Stability Evaluation using Modal Analysis, IEEE Transactions on Power Systems, vol. 7, n. 4, Nov 1992, pp. 1529 – 1542.

B. Gao, P. Kundur, G. K. Morison, Towards The Development of A Systematic Approach for Voltage Stability Assessment of Large-Scale Power Systems, IEEE Transactions on Power Systems, vol. 11, n. 3, August 1996, pp. 1314 – 1324.

A. A. Khan, A Simple Method For Tracing PV Curve Of A Radial Transmission Line, World Academy of Science, Engineering and Technology, vol. 2, n. 11, July 2008, pp. 347 – 350.

Chattopadhyay, T.K., Banerjee, S., Chanda, C.K., A simple approach on voltage stability index of distribution systems for loads of different types, (2014) International Review of Electrical Engineering (IREE), 9 (5), pp. 1002-1011.

Noor Ropidah Bujal, Marizan Sulaiman, Rosli Omar, A graphical user interface (GUI) for voltage stability analysis, Conference In Education - Technical Vocational Education and Training ~Cie-TVET 2014~, August 25-26, 2014, Mersing, Johor, Malaysia.

PowerWorld Corporation, “PowerWorld Simulator 18 Online Help,” 2014. [Online]. Available: [Accessed: 23-March-2014].

Millar, R.J., Saarijarvi, E., Lehtonen, M., Hyvarinen, M., Niskanen, J., Hamalainen, P., Electricity distribution network planning algorithm based on efficient initial and radial-to-full network conversion, (2013) International Review of Electrical Engineering (IREE), 8 (3), pp. 1076-1090.

Tenaga Nasional Berhad, “TNB Electricity System,” 2014. [Online]. Available: [Accessed: 13-Oct-2014].

H. Saadat, Power System Analysis (McGraw-Hill Inc., 2004).

P. Kundur, Power System Stability and Control (McGraw-Hill Inc., 1994).

P. M. Anderson, A. A. Fouad, Power System Control and Stability (John Wiley & Sons, Inc., 2003).

W. Ongsakul, D. N. Vo, Artificial Intelligence in Power System Optimization (Taylor & Francis Group, LLC, 2013).

B. Aydin, Voltage security assessment using P-V and Q-V curves, Master's thesis, Department of Electrical and Electronic Eng., Bahcesehir University, Istanbul, Turkey, 2008.


  • There are currently no refbacks.

Please send any question about this web site to
Copyright © 2005-2022 Praise Worthy Prize