A comparison of the short circuit interruption performance using transverse magnetic field contacts and axial magnetic field contacts in low frequency circuits with long arcing times i

Slade, Paul G.; Smith, Richard C.

doi:10.1109/deiv.2004.1422615

Cited by 25 publications

(7 citation statements)

References 11 publications

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“…When the short circuit interruption ability is tested at 50Hz, the results can be transferred to 60Hz because the arc duration time is reduced, resulting in less thermal heating of the VI components. The increase of the steepness of the di/dt at current zero is neglect able, because VIs are able to interrupt easily and robustly short circuit current with higher frequency, especially in the range between 50 … 100Hz [4]. Typical simulation result are presented in Fig.…”

Section: Conclusion and Discussionmentioning

confidence: 95%

“…The current crosses the point of "current zero" for interruption at a frequency of 60Hz with the di/dt being a factor of 1.21 higher compared to 50Hz. In general the interruption operation at higher frequency has a minor influence at the interruption performance especially at frequencies between 50 … 100Hz [4]. All the interruption performance investigation and type tests were done using TMF or AMF based contact systems with copper-chromium material.…”

Section: Generator Breaker Results Of Short Circuit Interruptiomentioning

confidence: 99%

“…Generator circuit breaker (GCB) developed VI´s are able to fulfil the requirements for 50 and 60Hz based on the presented simulation results and a number of type test which are performed on same vacuum interrupter at 50 or at 60Hz and according to [4]. The short-circuit interruption performance of the GCB were investigated and type tested mainly at the KEMA high power laboratory (HPL).…”

Section: Conclusion and Discussionmentioning

confidence: 99%

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Interruption performance at frequency 50 or 60Hz for generator breaker equipped with vacuum interrupters

Gentsch

Goettlich

Wember

et al. 2014

2014 International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)

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Vacuum interrupters are serving worldwide in distribution circuits, meeting the electrical and mechanical requirements specified in the IEC and/or ANSI standards for low and medium voltage applications. Generator circuits require special generator circuitbreakers and are tested according to IEC 62271-37.013 / ANSI/IEEE C37.013. Traditionally, generator circuitbreakers have been very large devices based on air-or SF6-blast interruption technology. Over the last 35 years, the short circuit interruption performance of vacuum interrupters has been dramatically increased due to continuous development, especially of contact system design and contact materials. These improvements allow the application of vacuum interrupter technology to generator circuit-breakers. Three phase vacuum circuit-breakers are available for this application in generator circuits at 50 and 60 Hz. To fulfil the required short circuit interruption ability, the test has to be performed at 50Hz for IEC markets and at 60Hz / 50Hz for ANSI markets. When the short circuit interruption ability is tested at 50Hz, the results can be transferred to 60Hz because the arcing time is reduced, while the di/dt is slightly steeper at current zero. Four main factors related to vacuum technology are investigated: The influence of the arcing time duration before current zero (CZ), the transferred charge I x dt, di/dt steepness at CZ, and finally the transient recovery voltage (TRV).

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Section: Conclusion and Discussionmentioning

confidence: 95%

Section: Generator Breaker Results Of Short Circuit Interruptiomentioning

confidence: 99%

Section: Conclusion and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Interruption performance at frequency 50 or 60Hz for generator breaker equipped with vacuum interrupters

Gentsch

Goettlich

Wember

et al. 2014

2014 International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)

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“…The increase of power capacity and transmission distance compared to the conventional (50 or 60 Hz) transmission ac system can be mentioned as its main advantages [2]. Protection of low frequency side faults is easier than for the DC side faults of VSC-HVDC due to their zero crossing point; also the power flow direction can be changed by the phase control of the voltage on the low frequency side [3], and existing circuit breakers can be used in this system although the interruption current is decreased to around half of 60 Hz [4].…”

Section: Introductionmentioning

confidence: 99%

A Proposal on Low Frequency AC Transmission as a Multi-Terminal Transmission System

Achara¹,

Ise²

2016

Energies

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This paper is focused on the discussion and comparison of characteristics and behavior of three low frequency ac (LFAC) transmission system configurations operating under the same control scheme and conditions to identify the most promising operation system for LFAC. Merits of LFAC over high voltage direct current (HVDC) are mentioned first. By changing power flow direction without auxiliary switches in multi-terminal application and easiness of short circuit protection are explained. The three configurations of LFACs are described and applied by the control scheme with the aid of the tool of the PSCAD/EMTDC software to consider the behavior of each LFAC system on line frequency and low frequency sides. For two-phase system, no fluctuation occurs on the line frequency side, which is the advantage over single-phase system. Furthermore, current rating on thyristor devices during operation and number of devices that used in each type of LFAC are calculated and compared. These results can lead to determine the most suitable transmission system for the LFAC system operation.

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“…In the case of LFAC, it could be easier to integrate the existing AC power plant because it can be built with commercially available power system components such as transformers and cables designed for regular frequency [4]. The transformer could be derated by a factor of transmitting frequency, with the same rated current, but partially containing the original rated voltage [5]. Given this information, the installation of LFAC can be easily paralleled with the existing transmission line.…”

Section: Introductionmentioning

confidence: 99%

Power Control of Low Frequency AC Transmission Systems Using Cycloconverters with Virtual Synchronous Generator Control

Pichetjamroen

Ise

2016

Energies

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This paper is focused on the application of a multi-terminal line-commutated converter-type low frequency AC transmission system (MTLF) using a cycloconverter by applying a new power control scheme for multi-terminal operation. With the virtual synchronous generator (VSG) control scheme, the transmitting power among the multi-terminal system can be accomplished without a communication link for frequency synchronization in each terminal. The details of the proposed control scheme are explained in order to understand the advantages of this method. The configuration of a two-phase low frequency AC transmission system (LFAC) is adopted to examine with the proposed control scheme. Simulation results are provided to illustrate the proposed control scheme with respect to the LFAC system's performance.

show abstract

A comparison of the short circuit interruption performance using transverse magnetic field contacts and axial magnetic field contacts in low frequency circuits with long arcing times i

Cited by 25 publications

References 11 publications

Interruption performance at frequency 50 or 60Hz for generator breaker equipped with vacuum interrupters

Interruption performance at frequency 50 or 60Hz for generator breaker equipped with vacuum interrupters

A Proposal on Low Frequency AC Transmission as a Multi-Terminal Transmission System

Power Control of Low Frequency AC Transmission Systems Using Cycloconverters with Virtual Synchronous Generator Control

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