Computational magnetohydrodynamics in the simulation of gas circuit breakers

Ostrowski, Jörg; Bianchetti, R.; Erceg-Baros, I.; Galletti, Bernardo; Gati, Rudolf; Pusch, D.; Schwinne, Michael; Wüthrich, B.

doi:10.1504/ijcse.2014.064528

Cited by 2 publications

(11 citation statements)

References 11 publications

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“…Depending on the application these devices are either encapsulated in grounded metal housings (Gas insulated switchgear) or have insulating housings, so-called live tank circuit breakers. For the highest current ratings, which are needed close to generators with nominal voltages in the range of a few 10-30 kV, generator circuit breakers are used [3].…”

Section: Outline Of Technologymentioning

confidence: 99%

“…Navier Stokes equations) in a single fluid approximation, where the thermodynamic and transport properties depend on pressure, temperature and composition (e.g. [3]). In this description, local thermodynamic equilibrium (LTE) is usually assumed.…”

Section: Overview Of Research In High Voltage Circuit Breakersmentioning

confidence: 99%

“…3). Metal and polymer vapors are often taken into account correctly in the thermodynamic and transport properties [3]. However, for the radiation properties this is still in an early phase [20] and often only SF 6 radiation data is used for the simulations.…”

Section: Overview Of Research In High Voltage Circuit Breakersmentioning

confidence: 99%

“…For the correct description of the arc, magnetic fields are of importance and are taken into account by solving Maxwell equations in form of vector potentials or using the BiotSavart approach, e.g [3,19,23].…”

Section: Overview Of Research In High Voltage Circuit Breakersmentioning

confidence: 99%

“…The main difference between the different types of breakers is the nature of the medium in which a plasma is formed, e.g. air in low voltage applications [3], metal vapor in vacuum circuit breakers (VCB) and typically SF 6 in high voltage applications. In all circuit breakers, the control of the arc and its conductance are important issues.…”

Section: Introductionmentioning

confidence: 99%

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Perspectives on Research on High Voltage Gas Circuit Breakers

Seeger

2014

Plasma Chem Plasma Process

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The research on high voltage circuit breakers using SF 6 is addressed. The current state of the art in this field is shortly reviewed and future research directions are discussed. These are mainly the radiative energy transport, the understanding and description of ablation processes at the nozzle and contact surfaces, the influence of such vapors on pressure build up and interruption capability, electric breakdown processes, departures from equilibrium, turbulence and the importance of magnetic fields and 3D modelling.

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Section: Outline Of Technologymentioning

confidence: 99%

Section: Overview Of Research In High Voltage Circuit Breakersmentioning

confidence: 99%

Section: Overview Of Research In High Voltage Circuit Breakersmentioning

confidence: 99%

Section: Overview Of Research In High Voltage Circuit Breakersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Perspectives on Research on High Voltage Gas Circuit Breakers

Seeger

2014

Plasma Chem Plasma Process

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On the order reduction of the radiative heat transfer model for the simulation of plasma arcs in switchgear devices

Fagiano

Gati

2016

Journal of Quantitative Spectroscopy and Radiative Transfer

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An approach to derive low-complexity models describing thermal radiation for the sake of simulating the behavior of electric arcs in switchgear systems is presented. The idea is to approximate the (high dimensional) full-order equations, modeling the propagation of the radiated intensity in space, with a model of much lower dimension, whose parameters are identified by means of nonlinear system identification techniques. The low-order model preserves the main structural aspects of the full-order one, and its parameters can be straightforwardly used in arc simulation tools based on computational fluid dynamics. In particular, the model parameters can be used together with the common approaches to resolve radiation in magnetohydrodynamic simulations, including the discrete-ordinate method, the P-N methods and photohydrodynamics. The proposed order reduction approach is able to systematically compute the partitioning of the electromagnetic spectrum in frequency bands, and the related absorption coefficients, that yield the best matching with respect to the finely resolved absorption spectrum of the considered gaseous medium. It is shown how the problem's structure can be exploited to improve the computational efficiency when solving the resulting nonlinear optimization problem. In addition to the order reduction approach and the related computational aspects, an analysis by means of Laplace transform is presented, providing a justification to the use of very low orders in the reduction procedure as compared with the full-order model. Finally, comparisons between the full-order model and the reduced-order ones are presented.

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Computational magnetohydrodynamics in the simulation of gas circuit breakers

Cited by 2 publications

References 11 publications

Perspectives on Research on High Voltage Gas Circuit Breakers

Perspectives on Research on High Voltage Gas Circuit Breakers

On the order reduction of the radiative heat transfer model for the simulation of plasma arcs in switchgear devices

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