Wide-area measurement based nonlinear control of a parallel AC/DC power system

As we know, the supplementary control modulation of the DC transmission line can provide damping torque to generator rotor oscillations for AC/DC power systems. This paper utilizes exact linearization technique to model a parallel AC/DC power system, and establishes a nonlinear control strategy for...

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Bibliographic Details
Main Authors: Hua Weng, Zheng Xu, Qingrui Tu
Format: Conference Proceeding
Language:English
Subjects:
damping rotor oscillations
Equations
exact linearization
Mathematical model
nonlinear control
Power system stability
Power transmission lines
Rotors
Transmission line measurements
Wide area measurements
widearea measurement
Online Access:Request full text
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Summary:As we know, the supplementary control modulation of the DC transmission line can provide damping torque to generator rotor oscillations for AC/DC power systems. This paper utilizes exact linearization technique to model a parallel AC/DC power system, and establishes a nonlinear control strategy for the supplementary control modulation of the DC transmission line with the wide-area measurement data. The exact linearization technique proposed in this paper utilizes a feedback of the wide-area measurement variables to avoid establishing complicated algebraic equations, which saves a lot of work in controllers designing. The method proposed in this paper is independent on the operation point of the AC/DC system, which means that it is capable of enhancing system performances for various system operating conditions. Simulation results show that the nonlinear controller of the DC transmission line with the wide-area measurement signals makes system oscillations decay quite well for various system operating conditions, while the linear controller shows less robust.
ISSN:2160-8555
2160-8563
DOI:10.1109/TDC.2012.6281549