Comparison of Two Ultra-Fast Actuator Concepts

Bissal, Ara; Magnusson, Jesper; Engdahl, Göran

doi:10.1109/tmag.2012.2198447

Cited by 75 publications

(52 citation statements)

References 7 publications

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“…Where, B is the friction coefficient, k is spring constant (of bistable assembly), m is the weight of the moving part, and F is the electromagnetic force generated by the Thomson Coils (TC) [13], [14].…”

Section: B Contact Separation Dynamicsmentioning

confidence: 99%

Reducing Peak Current and Energy Dissipation in Hybrid HVDC CBs Using Disconnector Voltage Control

Hedayati

Jovcic

2018

IEEE Trans. Power Delivery

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Abstract-Peak fault current and energy dissipation in high voltage direct current (HVDC) circuit breakers (CBs) are very important parameters that impact dc grid protection development. This paper analyses a hybrid DCCB (HCB) control that reduces peak current and energy dissipation, by regulating the voltage across contacts of the ultra-fast disconnector (UFD). This is achieved by manipulating the number of inserted surge arresters while contacts of the UFD are moving apart. The controller is seamlessly integrated with the current controller of HCBs. Analytical model for current and energy calculation is presented, verified, and employed for parametric studies. PSCAD simulation with 320kV, 16kA test circuit confirms that the proposed voltage control reduces the peak current and energy dissipation by around 20-30%. A 900V, 500A HCB laboratory hardware is described and the experimental results are shown to corroborate simulation conclusions.

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Section: B Contact Separation Dynamicsmentioning

confidence: 99%

Reducing Peak Current and Energy Dissipation in Hybrid HVDC CBs Using Disconnector Voltage Control

Hedayati

Jovcic

2018

IEEE Trans. Power Delivery

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“…LPEC are used in many branches of science and technology as electromechanical accelerators and shock-power devices [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…Thus, in [2], a comparative analysis of the LPEC with EA and CA is considered, and in [7] -LPEC with EA and with FA. In these works only electromechanical characteristics of the LPEC are considered, without considering the reliability of the design of the armature, the magnetic scattering fields, the interconnected electric, force, speed and mobile armature parameters and the presence of external FS.…”

Section: Introductionmentioning

confidence: 99%

Influence of Armature Parameters of a Linear Pulse Electromechanical Converter on Its Efficiency

Bolyukh¹,

Kocherga²,

Schukin³

2017

Elektroteh. elektromeh.

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Purpose. The evaluation of the effect of armature parameters on the efficiency of a linear pulsed electromechanical converter, taking into account the power, speed, constructive and environmental parameters. Methodology. First, the height of the electrically conductive, coil and ferromagnetic armature of a linear pulse electromechanical converter is determined, at which the highest velocity develops. An integral efficiency index is introduced, which takes into account, in a relative way, the power, speed, energy, electrical and field characteristics of the converter. Variants of the efficiency evaluation strategy are used that take into account the priority of each indicator of a linear pulse electromechanical converter using the appropriate weighting factor in the integral efficiency index. Results. A mathematical model of a linear pulsed electromechanical converter is developed. It is established that as the height of the electroconductive, coil and ferromagnetic armature increases, the force pulse increases. The greatest speed develops with the use of a coil armature, and the smallest with an electroconductive armature. In the converter with coil and ferromagnetic armature, practically the same values of the electrodynamic and electromagnetic force pulse are realized, while in the converter the electrodynamic force is 1.52 times smaller in the converter by the electrically conductive armature. It is established that with all efficiency evaluation strategies, the converter with a coil armature is the most effective, even in spite of its constructive complexity, and the converter with a ferromagnetic armature is the least effective, although it is constructively the simplest. Originality. For the first time, using the integral efficiency index, which takes into account the power, speed, energy, electrical and field indices in a relative way, it is established that with all efficiency evaluation strategies, the converter with a coil armature is the most effective, and the converter with a ferromagnetic anchor is the least effective. Practical value. The height of the electrically conductive, coil and ferromagnetic armature of a linear pulse electromechanical converter is determined, at which the highest speed develops. It is shown that when using an electrically conductive armature, the value of the electrodynamic force pulse is lower than when using a coil and ferromagnetic armature. It is established that the converter with a coil armature is the most efficient, and the converter with a ferromagnetic armature is the least effective. References 11, tables 3, figures 2. Key words: linear pulse electromechanical converter, mathematical model, electrically conductive, coil and ferromagnetic armature, integral efficiency index, efficiency evaluation strategy.Разработана математическая модель линейного импульсного электромеханического преобразователя (ЛИЭП), описывающая быстропротекающие и взаимосвязанные электромагнитные и электромеханические процессы, проявляющиеся при перемещении якоря относительно индуктора. Пок...

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“…ECEs of the DSC actuators are a bit higher than the ECEs of the TC. 9 The DSC actuator comprises a static and a movable coil connected in series, Figure 1 shows a typical configuration of the DSC actuator used in the medium voltage vacuum switches. The same current flows through the static and the moving coil in different directions, thus the axial magnetic flux densities generated by the coils cancel each other out, while the radial magnetic flux built by the coils reinforces each other.…”

Section: Introductionmentioning

confidence: 99%

“…9,[12][13][14][15][16][17] The former is with relatively low accuracy, but easier to be used in the optimal design, the latter is considered more accurate, but not so easy to be used in concert with the optimization design method. The FEM computation is usually considered as a verification tool as a supplementary of the prototype tests.…”

Section: Introductionmentioning

confidence: 99%

Research on ultra-fast vacuum mechanical switch driven by repulsive force actuator

Yuan

Pan

et al. 2016

Review of Scientific Instruments

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In order to meet the fast operation demands of DC circuit breakers, a high-speed vacuum mechanical switch (VMS) driven by a repulsive force actuator is focused. To improve the drive speed and energy conversion efficiency (ECE) of the actuators, the dynamic characteristics of the double sided coil repulsive force actuators are investigated, and two generalized optimization design methods focusing on the aspect ratio of the driving coils (defined as ARF) and the electrical parameters (defined as EF) are developed. FEM simulation models' simulation and tests of VMS prototypes are conducted to verify the optimization methods. Results prove that the ARF method could improve the ECE of a VMS from 1.05% to 7.55%, and EF method could improve ECE of the same VMS from 1.05% to 6.61%, the combination of ARF and EF could improve the value of VMS's ECE to 10.50%, thus proving the validity and accuracy of the optimization methods. C 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license

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Comparison of Two Ultra-Fast Actuator Concepts

Cited by 75 publications

References 7 publications

Reducing Peak Current and Energy Dissipation in Hybrid HVDC CBs Using Disconnector Voltage Control

Reducing Peak Current and Energy Dissipation in Hybrid HVDC CBs Using Disconnector Voltage Control

Influence of Armature Parameters of a Linear Pulse Electromechanical Converter on Its Efficiency

Research on ultra-fast vacuum mechanical switch driven by repulsive force actuator

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