Simple robust adaptive control of static VAR compensator

Machowski, J.; Nelles, Dieter

doi:10.1002/etep.4450030606

Cited by 8 publications

(4 citation statements)

References 9 publications

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“…For the convenience of further considerations it is worthwhile to write equation (8) in a transposed form:…”

Section: B Control Formulasmentioning

confidence: 99%

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Enhancing stability of a weakly connected AC power system by supplementary control of embedded HVDC lines

Nogal

2013

2013 12th International Conference on Environment and Electrical Engineering

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This paper deals with supplementary control of HVDC lines embedded to a weakly connected AC transmission system in order to enlarge power transfer ability and to enhance the transient stability. The proposed control is a WAMS-based control modulating the real and reactive power at the terminals of the HVDC lines. Relevant control formulas have been derived for a linear multi-machine system model with the application of the direct Lyapunov method. Validity and robustness of the proposed control has been verified by computer simulation for a nonlinear model of a multi-machine test system. The proposed control is robust and insensitive to changes in the network configuration and loading conditions in the AC power system. Moreover, the proposed control produces additive damping i.e. each controlled HVDC line contributes to positive damping in AC power system.

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“…For the convenience of further considerations it is worthwhile to write equation (8) in a transposed form:…”

Section: B Control Formulasmentioning

confidence: 99%

“…In some other publications [6][7][8][9][10][11][12][13] it is the direct Lyapunov method that is used for determining the control device parameters.…”

Section: Introductionmentioning

confidence: 99%

Enhancing stability of a weakly connected AC power system by supplementary control of embedded HVDC lines

Nogal

2013

2013 12th International Conference on Environment and Electrical Engineering

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“…The presented V‐I characteristics shows that the voltage control provided by the SVC system is almost in the range of 18.5 to 37.8 kV (L‐L) based on 5% slope. However, the change of network Thevenin equivalent would require an adaptive PI controller to avoid unstable response …”

Section: The System Implementationmentioning

confidence: 99%

Implementation aspects and comprehensive assessment of a 16 MVAr static VAr compensator installed for a weak distribution network

Alabduljabbar

Gerçek

Atalik

et al. 2017

Int. Trans. Electr. Energ. Syst.

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Summary Voltage regulation at weak distribution networks and feeders imposes several challenges. The degree of complexities of the overall design and implementation is network and site dependent. In this paper, design and implementation of a thyristor controlled reactor–based static VAr compensator (SVC) system to enhance voltage regulation and avoid voltage instability are presented and discussed. The SVC system is installed for an extremely weak distribution network with long feeders in a remote area in the Kingdom of Saudi Arabia. This work is the first implementation of an SVC system in the utility's distribution network in Kingdom of Saudi Arabia. Principles of operation, overall design assessment, and protection modifications in the installation area are described. Power stage and digital control system are custom designed according to the specific network and operation requirements. The overall system is examined under steady‐state and dynamic conditions. Power system at the corresponding area with/without the compensator is simulated using PSCAD/EMTDC software. Field test results are also obtained, and the performance of the system is discussed along with the design considerations required for such installations. The various technical discussions presented in this paper highlight several practical considerations and practices that are valid in similar installations for extremely weak distribution networks around the world.

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“…A direct Lyapunov method was first used for enhancing a power system stability by a supplementary control of FACTS devices in publications [33], [34], [35], [36], [37], [38] and later also in [7], [8]. This article describes a new (mathematically determined) algorithm of a simultaneous control of many HVDC links and many series FACTS devices used for enhancing power swings damping in the entire AC power system.…”

Section: Introductionmentioning

confidence: 99%

Damping of power swings in large-scale AC power system by simultaneous control of HVDC links and series FACTS devices

Nogal

2013

2013 IEEE Grenoble Conference

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The paper presents the algorithm of a simultaneous control of multiple HVDC links and series FACTS devices (such as phase angle regulator) to improve stability of an AC power system. The purpose of the study is to demonstrate that such stabilizing control, optimal from the perspective of the whole AC power system and insensitive to the loading condition and network configuration (robust control) may be clearly determined mathematically. The proposed method of control was derived using the direct Lyapunov method. The control system is a multi-loop control system using state variables as input signal, activated in the transient state and supplementary to the main steady-state control designed for regulating the power flow. Efficiency of the methods was confirmed with computer simulations. The algorithm perfectly damps the interarea power swings, showing at this very high robustness to changes in network configuration, loading conditions. Moreover, the proposed control produces additive damping i.e. each controlled HVDC line and/or FACTS device contributes to positive damping in AC power system.

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Simple robust adaptive control of static VAR compensator

Cited by 8 publications

References 9 publications

Enhancing stability of a weakly connected AC power system by supplementary control of embedded HVDC lines

Enhancing stability of a weakly connected AC power system by supplementary control of embedded HVDC lines

Implementation aspects and comprehensive assessment of a 16 MVAr static VAr compensator installed for a weak distribution network

Damping of power swings in large-scale AC power system by simultaneous control of HVDC links and series FACTS devices

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