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A Fast Online Voltage Instability Detection in Power Transmission System Using Wide-Area Measurements

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Iranian Journal of Science and Technology, Transactions of Electrical Engineering Aims and scope Submit manuscript

Abstract

Monitoring voltage stability in real time is a pressing issue for large complex power systems. In this work, reactive power losses calculated from synchrophasor measurements are used to develop a novel voltage instability detection index named SQLVIDI. The proposed index is fast enough to be used for real-time monitoring of voltage stability and for dispatching mitigating control actions in time. The prowess of the proposed index has been tested rigorously on New England 39 bus test system and IEEE 118 bus test system by running time-based simulations. The index successfully detects the impending long-term voltage instability in a timely manner. This timely detection of voltage instability ensure system operator to take preventive control actions to minimize the operational risk. Simulation results show’s that proposed index is simple, reliable, computationally inexpensive and therefore suitable for online real-time detection applications in power systems.

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Abbreviations

\(\Psi\) :

Smoothening function

\(Q_{\mathrm{loss}}\) :

Reactive power loss

CQL:

Consecutive reactive Power loss deviation

CQLB:

Reactive power loss deviation from baseload

FACTS:

Flexible AC transmission system

HVDC:

High Voltage DC

OLTC:

On-load tap changer

OXL:

Over-excitation limiter

PMU:

Phasor measurement unit

PSAT:

Power system analysis toolbox

QLVID:

Reactive power loss-based voltage instability detector

QLVIDI:

Reactive power loss-based voltage instability detection index

SQLVIDI:

Smoothed reactive power loss-based voltage instability detection index

STATCOM:

Static Compensator

WAMS:

Wide-area monitoring system

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Acknowledgements

The authors wish to thank Dr. S. C. Srivastava, IIT Kanpur, for providing the laboratory facility to develop this index.

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Authors and Affiliations

  1. Department of Electrical Engineering, MANIT, Bhopal, India

    Hemanthakumar Chappa & Tripta Thakur

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  1. Hemanthakumar Chappa
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  2. Tripta Thakur
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Correspondence to Hemanthakumar Chappa.

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Chappa, H., Thakur, T. A Fast Online Voltage Instability Detection in Power Transmission System Using Wide-Area Measurements. Iran J Sci Technol Trans Electr Eng 43 (Suppl 1), 427–438 (2019). https://doi.org/10.1007/s40998-018-0120-2

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