NDLI: Transient stability enhancement control of power systems with time-varying constraints

Content Provider	IET Digital Library
Author	Fan, Bo Yang, Qinmin Wang, Keyou Xu, Jin Sun, Youxian
Abstract	Transient control performance of power systems is extremely important, especially during the recovery stage from a system temporary fault. A large power angle error or generator relative speed could result in unrecoverable failure or system damage. In this study, a class of novel excitation controllers is proposed for power systems to place user-defined time-varying constraints on the system errors. First, the direct feedback linearisation technique is employed to transfer the original non-linear system to a linear one. An error transformation method is introduced to generate a new non-linear system, whose stability ensures that the time-varying constraints on the original system are satisfied. Thus, a backstepping-based excitation control methodology is designed for ideal case by assuming all system parameters are known. Thereafter, the uncertainties of system dynamics are also considered and compensated by designing an adaptive excitation controller. By utilising the standard Lyapunov synthesis, the closed-loop system is proved to be asymptotically stable, and all the other signals are bounded for the two control schemes. Furthermore, the system transient performance can be shaped arbitrarily with predefined trajectories, in the sense that the system errors never cross certain boundaries during transient phase. Eventually, extensive simulation studies demonstrate the feasibility of the theoretical results.
Starting Page	3251
Ending Page	3263
Page Count	13
ISSN	17518687
Volume Number	10
e-ISSN	17518695
Issue Number	Issue 13, Oct (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/10/13
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2016.0022
Journal	IET Generation, Transmission & Distribution
Publisher Date	2016-10-06
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Adaptive Control Adaptive Controller Asymptotic Stability Backstepping-based Excitation Control Methodology Closed Loop System Closed-loop System Control Nonlinearities Control of Electric Power System Control System Analysis Control System Synthesis Direct Feedback Linearisation Technique Error Transformation Method Feedback Linear System Lyapunov Method Nonlinear Control System Nonlinear System Power System Power System Control Power System Transient Stability Self Adjusting Control System Stability in Control Theory Standard Lyapunov Synthesis Synthesis Method System Temporary Fault Time Varying Control System Time Varying System Time-varying Constraint Transient Stability Enhancement Control User-defined Time-varying Constraint
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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