NDLI: Voltage instability prediction based on reactive power reserve of generating units and zone selection

Content Provider	IET Digital Library
Author	Dalali, Milad Karegar, Hossein Kazemi
Abstract	In this study, a voltage instability prediction algorithm is proposed based on Thevenin impedance matching theorem. This algorithm consists of three important parts: an adaptive network zoning algorithm, the Thevenin-based voltage instability risk predictor (VIRP) and a third-order extrapolation technique. The zoning algorithm, based on the concept of electrical distance, is proposed to divide the main network into several zones after the occurrence of any large event. Each zone consists of some load buses and generating units have the most influences on their voltage stability. The proposed VIRP is defined similarly to the Thevenin indicator multiplied with a contribution factor. This factor is calculated for each zone, based on the lack of the reactive power reserve in its generating units, to increase the predictor value, especially in the proximity of the instability. So, VIRP could reduce the instability detection time with respect to the Thevenin indicator. The further reduction in the instability detection time is obtained by the well known cubic spline extrapolation technique. This function is applied to the values of VIRP to predict the instant of the instability. The proposed algorithm is tested on the modified New England 39-bus test system supplied with the voltage-source converter-high-voltage dc link.
Starting Page	1432
Ending Page	1440
Page Count	9
ISSN	17518687
Volume Number	13
e-ISSN	17518695
Issue Number	Issue 8, Apr (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/13/8
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2018.5788
Journal	IET Generation, Transmission & Distribution
Publisher Date	2019-01-29
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Adaptive Network Zoning Algorithm Control of Electric Power System Cubic Spline Extrapolation Extrapolation Interpolation And Function Approximation Mathematics Numerical Analysis Power System Control Power System Dynamic Stability Power System Stability Reactive Power Reactive Power Reserve SpLine Stability in Control Theory Thevenin Impedance Matching Theorem Thevenin-based Voltage Instability Risk Predictor Third-order Extrapolation Technique Unit Generation VIRP Voltage Control Voltage Instability Prediction Voltage Stability Voltage-source Converter-high-voltage Dc Link Zone Selection
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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