NDLI: Enhancement of linearity and constancy of PMU-based voltage stability index: application to a Korean wide-area monitoring system

Content Provider	IET Digital Library
Author	Jung, Jaeyeop Cho, Hwanhee Park, Bohyun Nam, Suchul Hur, Kyeon Lee, Byongjun
Abstract	This study presents a new wide-area voltage stability monitoring method using synchronised phasor measurements. The salient features of the proposed index are the following: (i) It ensures constancy, which is the ability to maintain the same scale even if the system changes. (ii) It is pseudo-linear with respect to the power system stability level, which enhances intuitiveness for real-time operation. Accordingly, stability can be uniformly compared in various situations, and thus, the index can be used as a solid criterion or threshold point for system operation. A verification study of the proposed index with regard to constancy is carried out using Korean power system operation data. Furthermore, an implementation of the proposed method for the Korean wide-area monitoring system is presented, and it is demonstrated that the proposed index detects event more clearly than previous stability index through an actual event measured using phasor measurement units.
Starting Page	3357
Ending Page	3364
Page Count	8
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 17, Sep (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/17
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2019.0773
Journal	IET Generation, Transmission & Distribution
Publisher Date	2020-02-17
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Constancy Korean Power System Operation Data Korean Wide-area Monitoring System Phase And Gain Measurement Phase Measurement Phasor Measurement PMU-based Voltage Stability Index Power System Control Power System Measurement Power System Measurement And Metering Power System Stability Power System Stability Level Previous Stability Index Synchronised Phasor Measurement System Changes Wide-area Voltage Stability Monitoring Method
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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