Study on Dielectric Recovery Characteristic of Vacuum Interrupter after High Frequency Interruption

Xiao, Yu; Wu, Yi; Yang, Fei; Rong, Mingzhe; Yuan, Wei; Peng, Sunhonghao

doi:10.1109/icepe-st.2019.8928914

Cited by 6 publications

(2 citation statements)

References 11 publications

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“…The study identified some of the issues affecting the long-time insulating oil preparation including the oil bottle's high cleanliness requirement and incorrect sealing. Xiao et al [24] examined the dielectric recovery capability of a vacuum interrupter subject to interruption of varying rated current magnitudes. Findings from the work revealed that with a small rated current of 2 kA, there was an insignificant difference in the interrupter's recovery strength with axial magnetic field and butt contacts.…”

Section: Review Of Related Literaturementioning

confidence: 99%

Performance analysis of protection devices in electrical power distribution system: Eko Electricity Distribution Company as a case study

Awuwoloye,

Adejumobi,

Adebisi

et al. 2023

IJAAS

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One of the major challenges hindering the effective operation of the electricity distribution system is the malfunctioning of the protection scheme. Therefore, in this study, the performance of an interrupter (oil circuit breaker (OCB)) on the Eko Electricity Distribution Company (EKEDC) network was assessed. Five-year outage data (2014 to 2018) regarding tripping of the interrupter on fault and health conditions were collected from the EKEDC Agbara/Badagry Business Unit. The tripping frequency was compared. Inspection of selected OCBs within the considered network was conducted over the study period. A breakdown voltage (BDV) test was carried out on six oil samples each for 11 and 33 kV OCB using Megger OTS60PB. The highest tripping frequency of 75 and 10 were observed in 2014 and 2018 respectively when the interrupter tripped on fault and healthy conditions. The lowest tripping frequency was, however, observed in 2018 with values of 46 and 7 respectively when the interrupter tripped on fault and healthy conditions. The inspection conducted revealed carbonized OCB contacts. The BDV test showed that two oil samples each violated the standard value of 40 kV for 11 and 33 kV OCBs respectively. This study indicated that the defective oil samples required filtration or complete replacement.

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Section: Review Of Related Literaturementioning

confidence: 99%

Performance analysis of protection devices in electrical power distribution system: Eko Electricity Distribution Company as a case study

Awuwoloye,

Adejumobi,

Adebisi

et al. 2023

IJAAS

View full text Add to dashboard Cite

show abstract

“…In the meantime, due to the good characteristics of post-arc recovery, the reverse current could be injected at a smaller opening distance, which decreases arcing time and realizes the rapid current commutation. Xi'an Jiaotong University carried out tests on the post-arc insulation recovery characteristics and the coordination between the commutation parameters and the post-arc recovery time, meanwhile, summarised the change laws of the post-arc insulation recovery [15][16][17].…”

Section: Key Technologies and Featuresmentioning

confidence: 99%

Development and prospect of direct‐current circuit breaker in China

Chen

Zeng

et al. 2021

High Voltage

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The direct-current circuit breaker (DCCB) is the most ideal choice for DC fault isolation in DC grids. Despite a late start, China's research and development on the DCCB have made outstanding achievements. This article provides a brief glance of current China's DCCB development status. It begins by sorting out the technical route according to the topology of DCCB. Then it systematically summarises both mechanical and hybrid DCCBs with focussing on the aspects of topology structure and principle, key technology and characteristics, prototype development and application. It is apparent that Chinese scientists and engineers confronted the worldwide problem of large capacity DC breaking, and put forward a comprehensive solution which consists of an innovative topology structure based on coupled negative voltage circuit, breaking throughs on the key technologies such as highly controllable and reliable fault current commutation, millisecond-level ultra-fast and efficient electromagnetic repulsion mechanism, high tolerance and high stability power electronic switch, low residual voltage and fast response energy consumption device, etc. The article states that the world's first set of hybrid high-voltage (HV) DCCB, and the first set of mechanical HV DCCB have been developed. These DCCBs will soon be deployed to the DC grids which have the highest voltage levels therefore require the strongest breaking capacity. These achievements are leading the world in the development and application of DCCB. The article also discusses the overall development trends of DCCB in the areas of new topologies, key technological breakthroughs and application scenarios, etc. These discussions serve as references for DCCB's future technological advancement and its ever-expanding applications. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Study on Overvoltage Rise Rate Suppression Method for DC Interruption

Chen

Yang³

et al. 2022

J. Phys.: Conf. Ser.

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DC circuit breaker is the key equipment for control and protection in the medium and high voltage DC system. Mechanical DC circuit breakers have transient overvoltage in breaking, which may lead to re-breakdown of the breaker or even breaking failure in severe cases. In this paper, the transient overvoltage in the breaking process of typical mechanical DC circuit breakers is studied. An improved topology which can supress the transient voltage is propose. The effect of different capacitance and resistance parameters on weakening the transient voltage is investigated, and the adaptability of the proposed method to different breaking currents is studied.

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Study on Dielectric Recovery Characteristic of Vacuum Interrupter after High Frequency Interruption

Cited by 6 publications

References 11 publications

Performance analysis of protection devices in electrical power distribution system: Eko Electricity Distribution Company as a case study

Performance analysis of protection devices in electrical power distribution system: Eko Electricity Distribution Company as a case study

Development and prospect of direct‐current circuit breaker in China

Study on Overvoltage Rise Rate Suppression Method for DC Interruption

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