Directions of Development of Diagnostic Methods of Vacuum Medium-Voltage Switchgear

Węgierek, P.; Kostyła, Damian; Lech, Michał

doi:10.3390/en16052087

Cited by 6 publications

(6 citation statements)

References 105 publications

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“…The arc is finally extinguished at 5.8 ms. The proposed simulation method considers a nonlinear conductivity model of the sheath layer to better simulate the near-pole voltage drop and bending processes, which leads to more precise and truer current and voltage values compared to other works [10,11]. At the same time, the article simulated the actual product model, which was not achieved in previous articles because they only simulated an idealized model.…”

Section: Analysis Of Mcb Experimental Resultsmentioning

confidence: 99%

“…Zhao et al discuss the effects of arc ignition position, exhaust size, and gas-producing material on arc dynamics through an MHD model with a parallel pole-plate structure [10]. Pawel et al analyze the vacuum circuit breaker using the MHD method [11]. Rahimpour et al optimize the structure of solid-state circuit breaker using the MHD method [12].…”

Section: Introductionmentioning

confidence: 99%

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Study of Arc Interruption Characteristics under Rated Current in Low Voltage Circuit Breakers

Wang,

Ge,

Cao

et al. 2023

Energies

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The breaking capacity of rated current is one of the important indexes to evaluate the performance of circuit breakers, which is usually measured experimentally and cannot be analyzed in terms of the arcing characteristics of the opening process. Simulation methods based on the magnetohydrodynamic (MHD) model of the arc can be used to obtain the macroscopic motion of the arc within the interrupter and the interaction of the arc with the contacts, walls, and splitter plates. Therefore, this paper focuses on the arc interruption characteristics’ underrated current in low voltage circuit breakers by MHD simulation. A more accurate and effective field-circuit coupling MHD simulation model of low voltage circuit breaker products is developed in this paper. A nonlinear conductivity model of the sheath layer is considered to better simulate the near-pole voltage drop and bending processes after the arc has been cut by the splitter. The time-dependent magnetic field generated by the arc is considered in the calculation. Additionally, the real-time parameters of the external circuit are coupled to reflect the evolution of the arc characteristics under the action of the external circuit. The simulation results intuitively and clearly show the evolution of the arc during the breaking process. Through this, an arc extinguishing chamber can be designed to effectively regulate the arc interruption characteristics, thereby improving the breaking capacity of the circuit breaker. The accuracy and efficiency of the proposed simulation method is verified by experiments. This method can be extended to the performance analysis of AC/DC low voltage circuit breakers.

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Section: Analysis Of Mcb Experimental Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of Arc Interruption Characteristics under Rated Current in Low Voltage Circuit Breakers

Wang,

Ge,

Cao

et al. 2023

Energies

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show abstract

“…In contrast to conventional oil switches and air switches, vacuum switches offer notable advantages such as a low failure rate and exceptional breaking performance. [1][2][3] Compared with SF 6 switches commonly utilized in high-voltage and ultrahigh-voltage power systems, vacuum switches boast the signicant advantage of emitting zero greenhouse gases. Regarded as the most ideal alternative to SF 6 switches, vacuum switches nd extensive use in mediumvoltage and high-voltage transmission power systems.…”

Section: Introductionmentioning

confidence: 99%

Air pressure prediction model based on the fusion of laser-induced plasma images and spectra

Ke,

Luo,

et al. 2024

J. Anal. At. Spectrom.

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“…In order to avoid the use of non-environmentally friendly gases, an environmentally friendly alternative must gradually replace the greenhouse gas SF 6 as the insulating medium of the switchgear. At present, switching equipment insulated by vacuum or air and other environmentally friendly gases has become a hot research and development topic [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Improved Design of Fuse Tube for Environmental Protection Cabinet Based on Electric-Field Simulation

You

Qiao

et al. 2023

Energies

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Since the insulation performance of air is not as good as that of SF6 and other gases, it is necessary to conduct an in-depth study on the insulation characteristics of the fuse tube in order to meet the requirements of normal breaking and to design a structural improvement scheme for a 12 kV environmental protection cabinet fuse tube that is suitable for using air as the insulating medium. In this study, the insulation performance of the fuse tube before improvement was studied, and the electric-field distribution of the 12 kV fuse tube placed in the air-insulated switchgear was analyzed. The results showed that the electric-field was heavily concentrated in the air gap of the fuse tube plug and around the ground rod. In this study, the structure of the fuse tube was specifically designed. By spraying conductive paint on the intersection surface of different media, equipotentiality was achieved, and a reasonable metal shielding structure was added to the site where the field intensity was concentrated so as to improve the distribution of the electric-field and avoid the breakdown caused by the concentration of field intensity. Through several improved designs, the maximum electric-field strength of the fuse tube of an environmental protection cabinet can be effectively reduced, and the insulation requirements of relevant standards can be met. A partial discharge test for the improved fuse tube was carried out, and the local discharge quantity of the improved fuse tube met the industry requirements, which verified the rationality of the fuse-tube-improvement scheme.

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Directions of Development of Diagnostic Methods of Vacuum Medium-Voltage Switchgear

Cited by 6 publications

References 105 publications

Study of Arc Interruption Characteristics under Rated Current in Low Voltage Circuit Breakers

Study of Arc Interruption Characteristics under Rated Current in Low Voltage Circuit Breakers

Air pressure prediction model based on the fusion of laser-induced plasma images and spectra

Improved Design of Fuse Tube for Environmental Protection Cabinet Based on Electric-Field Simulation

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