NDLI: Analytical on-line method of determining transient stability margin using protection information for asymmetric faults

Content Provider	IET Digital Library
Author	Wang, Tong Liu, Jiuliang Zhu, Shaoxuan Wang, Zengping
Abstract	The transient stability margin is affected by different fault locations, fault clearing time and fault types that could be provided by protection information. This study presents an analytical on-line method of determining transient stability margin quantitatively using protection information for multi-generator system. First, the multi-machine system is equivalent to a one-machine infinity-bus system with the help of complementary cluster centre of inertia-relative motion. Second, the asymmetric fault models are built using positive rule, and the transient stability margin is then deduced by modelling the piecewise models of generator angles. Third, the practical transient stability margin assessment algorithm is then obtained. The sensitivity and affection mechanism of stability margin affected by fault factors are further derived, and the analytical stability margin is put forward to online access the transient stability margin after fault with the acquisition of the protection information. Finally, four-generator system, New England system and a real large power grid are used as test systems to verify the effectiveness and accuracy of the proposed method.
Starting Page	191
Ending Page	199
Page Count	9
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 2, Jan (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/2
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2019.0239
Journal	IET Generation, Transmission & Distribution
Publisher Date	2019-11-26
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Analytical On-line Method Analytical Stability Margin Asymmetric Fault Model Control of Electric Power System Different Fault Locations Fault Clearing Time Fault Location Power Generation Fault Power Grid Power System Control Power System Security Power System Stability Power System Transient Stability Power Transmission Fault Practical Transient Stability Margin Assessment Algorithm Protection Information Stability in Control Theory
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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