NDLI: Component damping evaluation in sub-synchronous oscillation based on transient energy flow method

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The Journal of Engineering

Component damping evaluation in sub-synchronous oscillation based on transient energy flow method

Content Provider	IET Digital Library
Author	Ren, Yina Wang, Xiaohai Chen, Lei Min, Yong Li, Gang Wang, Linke Yin, Lu
Abstract	In recent years, sub-synchronous oscillations have occurred frequently. Torsional interactions may cause oscillations in turbo-generator rotor shafts and thus huge losses. Conventional studies focus on the damping of system oscillation modes, but little on the damping of components, which could aid in finding out the source of a poorly damped or undamped oscillation. This study aims at a quantitative evaluation method of the damping characteristics of each component in torsional interaction. The transient energy flow method successfully applied in component damping evaluation and source location of low-frequency and ultra-low-frequency oscillations is further developed for that of sub-synchronous oscillation. The transient energy flow method evaluates the damping of a component by its dissipation rate of transient energy. A method of computing the transient energy flow in sub-synchronous oscillation is proposed. It is found that the rate of energy flow is relevant to the difference between the super-synchronous and sub-synchronous powers. The relation between the transient energy dissipation and the damping of a component is validated by both mathematical deduction and simulation results. The transient energy flow method can evaluate component damping and therefore locate oscillation sources effectively in sub-synchronous oscillation.
Starting Page	460
Ending Page	469
Page Count	10
ISSN	17518687
Volume Number	14
e-ISSN	17518695
Issue Number	Issue 3, Feb (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/14/3
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2019.0391
Journal	IET Generation, Transmission & Distribution
Publisher Date	2019-11-28
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Component Damping Evaluation Control of Electric Power System Damping Damping Characteristic Mechanical Component Mechanical Engineering Oscillation Oscillator Poorly Damped Undamped Oscillation Power System Control Power System Measurement Power System Measurement And Metering Power System Stability Quantitative Evaluation Method Rotors Shafts Sub-synchronous Oscillation Sub-synchronous Powers Super-synchronous Powers System Oscillation Mode Torsion Torsional Interaction Transient Energy Dissipation Transient Energy Flow Method TurboGenerator Ultra-low-frequency Oscillations Vibrations And Shock Wave
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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