Optimal modulation controller for superconducting magnetic energy storage

Machowski, J.; Nelles, Dieter

doi:10.1016/0142-0615(94)90033-7

Cited by 9 publications

(3 citation statements)

References 14 publications

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“…These concepts have already been applied to series compensators [Januszewski et al, 2004], [Ghandhari et al, 2001b], and also to SMES systems in [Machowski and Nelles, 1994], using, however, a reduced network description for power systems.…”

Section: Introductionmentioning

confidence: 98%

Superconducting Magnetic Energy Storage Control Strategy for Power System Stability Improvement

Griffo¹,

Lauria²

2005

International Journal of Emerging Electric Power Systems

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Transient stability is recognized as a critical problem for modern electrical power systems, since the deregulation could involve more and more restricted margins. Continuous improvements in power electronics technology gives the possibility to improve significantly the dynamic behaviour. Recently, a great attention in the relevant literature has been paid to Superconducting Magnetic Energy Storage (SMES) devices, showing their intrinsic ability to improve power transmission capability. In the paper, a control strategy for these devices is derived starting from a Control Lyapunov function, thus determining reference values for SMES active and reactive powers injections, able to counteract the effects of large disturbances. Hence, a new topology of the power conditioning system for interfacing SMES device with a power system is proposed. Finally, a control law based upon quasi-sliding technique is employed for tracking the required active and reactive powers. In the last part of the paper an application is presented, with reference to a test system, allowing to outline the flexibility and the goodness of the proposed control strategy.

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Section: Introductionmentioning

confidence: 98%

Superconducting Magnetic Energy Storage Control Strategy for Power System Stability Improvement

Griffo¹,

Lauria²

2005

International Journal of Emerging Electric Power Systems

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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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“…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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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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Optimal modulation controller for superconducting magnetic energy storage

Cited by 9 publications

References 14 publications

Superconducting Magnetic Energy Storage Control Strategy for Power System Stability Improvement

Superconducting Magnetic Energy Storage Control Strategy for Power System Stability Improvement

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

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

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