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Dynamic Modeling of PWM-Based AC Link Series Compensator

  • Research Article - Electrical Engineering
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Abstract

This paper describes the theory and modeling technique of a novel controller based on PWM-based series compensator (PWMSC) with AC link. This is a new flexible AC transmission systems device for power flow control of transmission line and dam** of low-frequency oscillations. The paper demonstrates the basic module, steady state operation, mathematical analysis, current injection modeling and dynamic control model of the PWMSC. The main contribution of this work is that a current injection model of the PWMSC for studying the effect of the PWMSC on the low-frequency oscillations is proposed. A brief comparison of this series compensator equipped with a power oscillation dam** stabilizer with thyristor-controlled series capacitors (TCSC) is presented for dynamic series compensation of transmission lines. The results obtained show that the proposed model is efficient for studying the effects of the PWMSC on the electromechanical oscillations and it has better oscillation dam** characteristics than the TCSC.

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Abbreviations

\({E'_{\rm q}}\) :

Internal voltage behind transient reactance

E fd :

Equivalent excitation voltage

FACTS:

Flexible alternating current transmission systems

IPFC:

Interline power flow controller

K PWMSC :

Regulator gain

M :

Machine inertia coefficient

POD:

Power oscillation dam**

PSS:

Power system stabilizer

PWMSC:

Pulse width modulated series compensator

P e :

Electrical output power

P m :

Mechanical input power

SSSC:

Synchronous static series compensator

TCSC:

Thyristor controlled series capacitor

TSSC:

Thyristor switched series capacitor

T 1 :

Lead time constant of controller

T 2 :

Lag time constant of controller

T 3 :

Lead time constant of controller

T 4 :

Lag time constant of controller

T PWMSC :

Regulator time constant

\({T'_{\rm do}}\) :

Time constant of excitation circuit

T e :

Electric torque

UPFC:

Unified power flow controller

V i :

Terminal voltage

v ref :

Reference voltage

ω :

Rotor speed

δ :

Rotor angle

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Authors and Affiliations

  1. Department of Electrical Engineering, Center of Excellence for Power Automation and Operation, Iran University of Science and Technology, Tehran, Iran

    A. Safari, H. A. Shayanfar & A. Kazemi

  2. Technical Engineering Department, University of Mohaghegh Ardabili, Ardabil, Iran

    H. Shayeghi

Authors
  1. A. Safari
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  2. H. A. Shayanfar
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  3. A. Kazemi
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  4. H. Shayeghi
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Correspondence to A. Safari.

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Safari, A., Shayanfar, H.A., Kazemi, A. et al. Dynamic Modeling of PWM-Based AC Link Series Compensator. Arab J Sci Eng 39, 1971–1981 (2014). https://doi.org/10.1007/s13369-013-0740-9

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  • DOI: https://doi.org/10.1007/s13369-013-0740-9

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