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Transient Stability Enhancement of Power Systems Using Observer-Based Sliding Mode Control

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Advances and Applications in Sliding Mode Control systems

Part of the book series: Studies in Computational Intelligence ((SCI,volume 576))

Abstract

The high complexity and nonlinearity of power systems, together with their almost continuously time-varying nature, have presented a big challenge for control engineers, for decades. The disadvantages of the linear controllers/models, such as being dependent on the operating condition, sensibility to the disturbance such as parametric variations or faults can be overcome by using appropriate nonlinear control techniques. Sliding-mode control technique has been extensively used when a robust control scheme is required. This chapter presents the transient stabilization with voltage regulation analysis of a synchronous power generator driven by steam turbine and connected to an infinite bus. The aim is to obtain high performance for the terminal voltage and the rotor speed simultaneously under a large sudden fault and a wide range of operating conditions. The methodology adopted is based on sliding mode control technique. First, a nonlinear sliding mode observer for the synchronous machine damper currents is proposed. Next, the control laws of the complete ninth order model of a power system, which takes into account the stator dynamics as well as the damper effects, are developed. They are shown to be asymptotically stable in the context of Lyapunov theory. Finally, the effectiveness of the proposed combined observer-controller for the transient stabilization and voltage regulation is demonstrated.

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Abbreviations

\({v}_{d}{,v}_{q}\) :

Direct and quadrature axis stator terminal voltage components, respectively

\({v}_{fd}\) :

Excitation control input

\({v}_{t}\) :

Terminal voltage

\(i_{d}{,i}_{q}\) :

Direct and quadrature axis stator current components, respectively

\(i_{fd}\) :

Field winding Current

\(i_{kd}{,i}_{kq}\) :

Direct and quadrature axis damper winding current components, respectively

\(\lambda _{d}{,\lambda }_{q}\) :

Direct and quadrature axis flux linkages, respectively

\(R_{s}\) :

Stator resistance

\(R_{fd}\) :

Field resistance

\(R_{kd}{,R}_{kq}\) :

Damper winding resistances

\({L}_{d}{,L}_{q}\) :

Direct and quadrature self inductances, respectively

\(L_{fd}\) :

Rotor self inductance

\(L_{kd}{,L}_{kq}\) :

Direct and quadrature damper winding self inductances, respectively

\(L_{md}{,L}_{mq}\) :

Direct and quadrature magnetizing inductances, respectively

\(\omega \) :

Angular speed of the generator

\(\delta \) :

Rotor angle of the generator

\({T}_{m}\) :

Mechanical torque

\(T_{e}\) :

Electromagnetic torque

D :

Damping constant

H :

Inertia constant

a :

Phase angle of infinite bus voltage

\({V}^{\propto }\) :

Infinite bus voltage

\(L_{e}\) :

Inductance of the transmission line

\(R_{e}\) :

Resistance of the transmission line

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Authors and Affiliations

  1. Cadi Ayyad University, Ecole Nationale des Sciences Appliqu ées, Safi, Morocco

    M. Ouassaid

  2. Mohammed V University, Ecole Mohammadia D’Ing énieurs, Rabat, Morocco

    M. Maaroufi & M. Cherkaoui

Authors
  1. M. Ouassaid
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  2. M. Maaroufi
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  3. M. Cherkaoui
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Correspondence to M. Ouassaid .

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Editors and Affiliations

  1. Faculty of Computers and Information, Benha University, Benha, Egypt

    Ahmad Taher Azar

  2. Department of Engineering Design and Mathematics, University of the West of England, Bristol, United Kingdom

    Quanmin Zhu

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Ouassaid, M., Maaroufi, M., Cherkaoui, M. (2015). Transient Stability Enhancement of Power Systems Using Observer-Based Sliding Mode Control. In: Azar, A., Zhu, Q. (eds) Advances and Applications in Sliding Mode Control systems. Studies in Computational Intelligence, vol 576. Springer, Cham. https://doi.org/10.1007/978-3-319-11173-5_16

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  • DOI: https://doi.org/10.1007/978-3-319-11173-5_16

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