Transient stability improvement through excitation control

Bazanella, Alexandre Sanfelice; Conceição, Caue Loureiro da

doi:10.1002/rnc.910

Cited by 16 publications

(9 citation statements)

References 20 publications

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“…Actually, this control law is the extension of so-called LgV controller [22] in the structure preserving system. Then we have:…”

Section: Stability Analysis With Considering Control Effectmentioning

confidence: 99%

Transient stability analysis and control of power systems with considering flux decay by energy function approach

Lu¹,

Zhang²

2012

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. In this paper, transient stability of power systems with structure preserving models is considered. A Hamiltonian function which can be regarded as a Lyapunov function for the system is proposed. Based on this, the influence of flux decay dynamics, especially during a fault, on transient stability is analyzed. With the increase of load power, the variation of stability boundary in the rotor angle/E ′ q plane is shown. The Energy-based excitation control, aiming at injecting additional damping into the post-fault system may reduce the critical clearing time (CCT). This can be demonstrated by the comparison of different flux decay dynamics in the fault-on condition, and the reason is illustrated by the relationship between rotor angle/E ′ q and the stability boundary. An improved control strategy is proposed and applied to increase the CCT. Simulation results verify that improvement is obtained both in transient stability and dynamic performance.

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“…Actually, this control law is the extension of so-called LgV controller [22] in the structure preserving system. Then we have:…”

Section: Stability Analysis With Considering Control Effectmentioning

confidence: 99%

Transient stability analysis and control of power systems with considering flux decay by energy function approach

Lu¹,

Zhang²

2012

Bulletin of the Polish Academy of Sciences: Technical Sciences

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“…In the following procedure, we will design the control law by using a novel adaptive backstepping method for system (2) with the equivalence reactance and the damping coefficient uncertainties.…”

Section: Design Of Nonlinear Main Steam Valve Controllermentioning

confidence: 99%

“…Our main result is given in the following theorem. Theorem 1 For system (2), under controller (9) and parameter update laws (15), the closed-loop system (11) is asymptotically stable at the origin.…”

Section: Design Of Nonlinear Main Steam Valve Controllermentioning

confidence: 99%

A novel adaptive backstepping design of turbine main steam valve control

Sun

Zhao

2010

J. Control Theory Appl.

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The problem of transient stability for a single machine infinite bus system with turbine main steam valve control is addressed by means of a novel adaptive backstepping method in this paper. The recursive design procedure of the proposed controller is much simpler than that of the existing controller based on conventional adaptive backstepping method. In the system, the damping coefficient is measured inaccurately, and the reactance of transmission line also contains a few uncertainties. A nonlinear robust controller and parameter updating laws are obtained simultaneously. The system does not need to be linearized, and the closed-loop error system is guaranteed to be asymptotically stable. The design procedure and simulation results demonstrate the effectiveness of the proposed design.

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“…Generator excitation control can not only enhance the power system static stability limit, but also attenuate low-frequency electromechanical oscillations inherent to power systems, during transient conditions (Bazanella & Conceic -ão, 2004;Damm, Marino, & LamnabhiLagarrigue, 2004;Maya-Ortiz & Espinosa-Pé rez, 2004;Sae-Kok, Yokoyama, Verma, & Ogawa, 2006). Since excitation control is restrained by excitation current ceiling, the requirement of generator possessing excess of excitation current ceiling will increase its manufacturing cost (Lu & Sun, 1993).…”

Section: Introductionmentioning

confidence: 99%

Adaptive coordinated passivation control for generator excitation and thyristor controlled series compensation system

Sun

Zhao

Dimirovski

2009

Control Engineering Practice

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Transient stability improvement through excitation control

Abstract: In this paper we present, discuss, extend and compare different design methods for excitation control aiming at improving transient and steadystate stability.

Cited by 16 publications

References 20 publications

Transient stability analysis and control of power systems with considering flux decay by energy function approach

Transient stability analysis and control of power systems with considering flux decay by energy function approach

A novel adaptive backstepping design of turbine main steam valve control

Adaptive coordinated passivation control for generator excitation and thyristor controlled series compensation system

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