Failure modes of synthetic test circuits used to evaluate the current interruption capability of high-voltage circuit breakers

Niayesh, Kaveh

doi:10.1002/etep.1902

Cited by 4 publications

(7 citation statements)

References 15 publications

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“…With regard to relays 3 and 4, their grounding and phase‐to‐phase settings of zone 1 are both 44.28 ∠ 86.1 ∘ . The setting of zone 2 is 96.74 ∠ 86.1 ∘ considering the effect of the branch coefficient . The grounding impedance setting of zone 3 is 124.5 ∠ 86.1 ∘ , and the time dial is 1.5 seconds.…”

Section: Case Studymentioning

confidence: 99%

“…With regard to scenarios 2 and 3, the main station could distinguish the protection misoperation caused by overload from the correct pickup of the remote backup protection of faulted lines, even when the faulted line could not be entirely isolated owing to the circuit breaker failure, etc.…”

Section: Case Studymentioning

confidence: 99%

“…The setting of zone 2 is 96.74 ∠ 86.1 ∘ considering the effect of the branch coefficient. 27 The grounding impedance setting of zone 3 is 124.5 ∠ 86.1 ∘ , and the time dial is 1.5 seconds. The phaseto-phase impedance setting of zone 3 is 166 ∠ 86.1 ∘ , and the time dial is 1.0 second.…”

Section: Case Studymentioning

confidence: 99%

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Probabilistic identification method of distance protection misoperation due to power flow transfer

Dai

Crossley

Liu

et al. 2016

Int. Trans. Electr. Energ. Syst.

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The unintended trip (misoperation) of backup protections caused by overload scenarios or improper relay settings may trigger or accelerate cascading accidents and blackouts. Previous researches on the misoperation identification of the backup protection, focusing around deterministic methods rather than probabilistic information, usually initiates the decision making after the final formation of flow transfer and leaves out the dynamic process of relays after the system fault. Time for taking measures is hence very limited, especially when the communication latency and the calculation task are considered. A new probabilistic identification method of the distance protection misoperation considering the sequential coordination of backup relays is proposed. Then the preliminary implementation architecture of the proposed method is presented, which considers the coordination of computing task allocation, and the information forming and update strategies to make full use of existing protective devices and decrease the communication load. Case studies demonstrate that the method could adapt to different scenarios and identify the potential misoperation reasonably to allow time for taking measures against protection malfunction. Furthermore, it could supply compact reference information for fault review and analysis.

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Section: Case Studymentioning

confidence: 99%

Section: Case Studymentioning

confidence: 99%

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Probabilistic identification method of distance protection misoperation due to power flow transfer

Dai

Crossley

Liu

et al. 2016

Int. Trans. Electr. Energ. Syst.

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“…The maintenance style calls for preventative performance test of power equipment under the power-off condition and maintenance of equipment according to relevant test results. Maintenance based on the high-voltage circuit-breaker (Niayesh, 2014) is to test the insulation state of the circuit breaker and the mechanical characteristics of the operation mechanism. However, operators are not quite clear about characteristics of the operation mechanism of the circuit breaker and the difference of the professional level, thus resulting in frequent occurrence of inefficient maintenance and accidents even if the circuit breaker is within the preventative maintenance period.…”

Section: Introductionmentioning

confidence: 99%

High-Voltage Circuit-Breaker Fault Diagnosis Based on Mechanical Vibration Signals

2016

Rev. Téc. Ing. Univ. Zulia

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In order to guarantee the operation stability of high-voltage circuit-breaker, this paper extracts eigenvector of vibration signals based on mining of characteristic entropy of the wavelet packet obtained under the state of circuit breaker. Besides, the eigenvector of various fault samples is adopted as the input information of the BP network. After that, the author conducts training of the well-built BP network to lay the foundation for the building of the high-voltage circuit-breaker fault diagnosis model based on the BP neural network and the wavelet characteristic entropy extraction. At last, through diagnosis simulation analysis of various faults, results suggest that: after wavelet packet characteristic entropy extraction of vibration signals of various faults, the eigenvector thus obtained has a high discrimination; the comprehensive diagnosis accuracy of the model can reach 92.5% after diagnosis of different fault types through the trained BP network. Therefore, the high-voltage circuit-breaker fault diagnosis model put forward in this paper has a high fault discrimination accuracy and can make up for defects of periodic maintenance and inefficient maintenance of the circuit-breaker.

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“…However, it has been noticed that nowadays, network owners are beginning to concern about the vacuum conditions and, subsequently, the switching capabilities of these VCBs [2]. To determine the internal pressure of vacuum interrupter, which is in service, most manufacturers use the Penning or Magnetron method [3][4][5][6][7]. To determine the internal pressure of vacuum interrupter, which is in service, most manufacturers use the Penning or Magnetron method [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Investigating field emission current in vacuum interrupters to estimate vacuum pressure level using PIC simulation

Rezvani

Bathaee

Akbari

2016

Int. Trans. Electr. Energ. Syst.

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Summary Condition monitoring of vacuum circuit breaker is one of the important factors to determine its life time. This is through a close monitoring of the internal pressure of vacuum interrupter for vacuum circuit breaker conditioning. The rise of internal pressure exceeding a certain threshold value causes loss of current switching capability and electric insulating properties. In recent decades, many methods of determining internal pressure have been investigated to evaluate the influences of different parameters. Although most of them are based on experimental tests, none of them was satisfying and reliable to provide enough information about residual vacuum pressure. Thus, the field emission current is modeled and simulated in this paper using plasma modeling by particle in cell method in order to determine the correlation between current and vacuum pressure. The simulation results demonstrate that a more precise value of internal vacuum pressure is given by applying magnetic field with impulse current simultaneously in order to determine residual vacuum pressure. Copyright © 2016 John Wiley & Sons, Ltd.

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Failure modes of synthetic test circuits used to evaluate the current interruption capability of high-voltage circuit breakers

Cited by 4 publications

References 15 publications

Probabilistic identification method of distance protection misoperation due to power flow transfer

Probabilistic identification method of distance protection misoperation due to power flow transfer

High-Voltage Circuit-Breaker Fault Diagnosis Based on Mechanical Vibration Signals

Investigating field emission current in vacuum interrupters to estimate vacuum pressure level using PIC simulation

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