Design, Modeling and Control of Hybrid DC Circuit Breaker Based on Fast Thyristors

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Abstract

This paper presents a systematic study on designing hybrid direct current (DC) circuit breaker (CB) based on fast thyristors. As an illustration, the DC CB main parameters are calculated for a 120kV, 1.5kA test breaker with interrupting
current of 10kA. The studies indicate that the opening time of 2.3ms can be achieved only if fast thyristors are employed. It is further illustrated that there is a design tradeoff between minimum interrupting current capability and discharge time for the internal capacitors (reclosing speed). The DC CB control
system for opening and closing is presented based on different levels of protection and the self-protection. The DC CB is modelled in PSCAD and simulation results are used to evaluate the breaker performance under different operating conditions. It is concluded that the model represents well the DC CB and can be employed for DC grid protection studies. It is further shown that opening time becomes longer as interrupting current reduces, and it is very long in case of load current interruption.
Original languageEnglish
Pages (from-to)919-927
Number of pages9
JournalIEEE Transactions on Power Delivery
Volume33
Issue number2
Early online date9 Oct 2017
DOIs
Publication statusPublished - 2 Apr 2018

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Electric circuit breakers
Thyristors
Capacitors

Keywords

  • DC grids
  • protection
  • hybrid DC circuit breaker
  • fast thyristor

Cite this

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title = "Design, Modeling and Control of Hybrid DC Circuit Breaker Based on Fast Thyristors",
abstract = "This paper presents a systematic study on designing hybrid direct current (DC) circuit breaker (CB) based on fast thyristors. As an illustration, the DC CB main parameters are calculated for a 120kV, 1.5kA test breaker with interruptingcurrent of 10kA. The studies indicate that the opening time of 2.3ms can be achieved only if fast thyristors are employed. It is further illustrated that there is a design tradeoff between minimum interrupting current capability and discharge time for the internal capacitors (reclosing speed). The DC CB controlsystem for opening and closing is presented based on different levels of protection and the self-protection. The DC CB is modelled in PSCAD and simulation results are used to evaluate the breaker performance under different operating conditions. It is concluded that the model represents well the DC CB and can be employed for DC grid protection studies. It is further shown that opening time becomes longer as interrupting current reduces, and it is very long in case of load current interruption.",
keywords = "DC grids, protection, hybrid DC circuit breaker, fast thyristor",
author = "{Jamshidi Far}, Aliakbar and Dragan Jovcic",
note = "This work was supported by the European Union’s Horizon 2020 research and innovation programme under grant No. 691714",
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T1 - Design, Modeling and Control of Hybrid DC Circuit Breaker Based on Fast Thyristors

AU - Jamshidi Far, Aliakbar

AU - Jovcic, Dragan

N1 - This work was supported by the European Union’s Horizon 2020 research and innovation programme under grant No. 691714

PY - 2018/4/2

Y1 - 2018/4/2

N2 - This paper presents a systematic study on designing hybrid direct current (DC) circuit breaker (CB) based on fast thyristors. As an illustration, the DC CB main parameters are calculated for a 120kV, 1.5kA test breaker with interruptingcurrent of 10kA. The studies indicate that the opening time of 2.3ms can be achieved only if fast thyristors are employed. It is further illustrated that there is a design tradeoff between minimum interrupting current capability and discharge time for the internal capacitors (reclosing speed). The DC CB controlsystem for opening and closing is presented based on different levels of protection and the self-protection. The DC CB is modelled in PSCAD and simulation results are used to evaluate the breaker performance under different operating conditions. It is concluded that the model represents well the DC CB and can be employed for DC grid protection studies. It is further shown that opening time becomes longer as interrupting current reduces, and it is very long in case of load current interruption.

AB - This paper presents a systematic study on designing hybrid direct current (DC) circuit breaker (CB) based on fast thyristors. As an illustration, the DC CB main parameters are calculated for a 120kV, 1.5kA test breaker with interruptingcurrent of 10kA. The studies indicate that the opening time of 2.3ms can be achieved only if fast thyristors are employed. It is further illustrated that there is a design tradeoff between minimum interrupting current capability and discharge time for the internal capacitors (reclosing speed). The DC CB controlsystem for opening and closing is presented based on different levels of protection and the self-protection. The DC CB is modelled in PSCAD and simulation results are used to evaluate the breaker performance under different operating conditions. It is concluded that the model represents well the DC CB and can be employed for DC grid protection studies. It is further shown that opening time becomes longer as interrupting current reduces, and it is very long in case of load current interruption.

KW - DC grids

KW - protection

KW - hybrid DC circuit breaker

KW - fast thyristor

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