Research Article Open Access

POWER STABILITY MONITORING BASED ON VOLTAGE INSTABILITY PREDICTION APPROACH THROUGH WIDE AREA SYSTEM

H. H. Goh1, Q. S. Chua1, S. W. Lee1, B. C. Kok1, K. C. Goh2 and K. T.K. Teo3
  • 1 Department of Electrical Power Engineering, Faculty of Electrical and Electronic Engineering, Malaysia
  • 2 Department of Construction Management, Faculty of Technology Management and Business, Universiti Tun Hussein Onn Malaysia, 86400 Parit Raja, BatuPahat, Johor, Malaysia
  • 3 Modelling, Simulation and Computing Laboratory, Level 3, Block C, School of Engineering and Information Technology, Jalan UMS, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia

Abstract

Nowadays, power systems are being forced to operate closer to its security limit due to current economic growth and the difficulties to upgrade the existing grid infrastructure. With the sudden increment of power demand, voltage instability problem has become a main concern to the power system operator because voltage instability has led or crucially contributed to some major blackouts throughout the world. Hence, methods for early warning and early prevention are required to prevent the power system from a collapse and led to blackout. Real-time voltage instability predictor method is applied on one of the load areas in Tenaga Nasional Berhad (TNB) network in this study. Voltage instability predictor calculation is performed according to the real-time measurement provided by Phasor Measurement Units (PMUs). The voltage instability predictor calculates the power margin and makes comparison to the pre-set margin threshold. Last but not least, the stability condition of the system is based on the comparison between the margin and the pre-set threshold. The main perception is to ensure the margin index always stay positive and suitable early prevention should be implemented when the index is close to zero.

American Journal of Applied Sciences
Volume 11 No. 5, 2014, 717-731

DOI: https://doi.org/10.3844/ajassp.2014.717.731

Submitted On: 23 January 2014 Published On: 10 February 2014

How to Cite: Goh, H. H., Chua, Q. S., Lee, S. W., Kok, B. C., Goh, K. C. & Teo, K. T. (2014). POWER STABILITY MONITORING BASED ON VOLTAGE INSTABILITY PREDICTION APPROACH THROUGH WIDE AREA SYSTEM. American Journal of Applied Sciences, 11(5), 717-731. https://doi.org/10.3844/ajassp.2014.717.731

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Keywords

  • Discrete Kalman Filter (DKF)
  • Phasor Measurement Units (PMUs)
  • Radial Equivalent Independent (REI) Network
  • State Estimation
  • Thevenin Equivalent
  • Voltage Instability Predictor (VIP)
  • Wide Area Measurement System (WAMS)