Research on Field Electromagnetic Compatibility Test Method of System Level for Electronic Transformers

Lin, Cheng; Zhang, Cheng; Wu, Jingfeng; Wei, Haokun; Guo, Anxiang; Lu, Jiangping; Wu, Zihao; Wang, Chenxi; Xu, Haodong

doi:10.1109/ei2.2018.8582260

Cited by 2 publications

(2 citation statements)

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“…However, the residual charge of the n th breakdown bus determines that of the n + 1 th breakdown bus in the load side. The residual charge voltage U Qn at this moment of the n th breakdown of the short bus can be derived from Equation (8).…”

Section: Voltage In Load Sidementioning

confidence: 99%

“…Electromagnetic disturbance phenomena such as switch operation, lightning impact, short-circuit current, insulation breakdown, spark discharge, power frequency electric field, and power frequency magnetic field may affect secondary electronic equipment. Among them, the fault case of the signal acquisition unit on the secondary side of the electronic transformer under strong transient electromagnetic disturbance of the switch operation is the most prominent, and relevant accident cases are reported from time to time -165 [5][6][7][8]. Therefore, it is urgent to grasp the transient disturbance level of the signal acquisition port of the electronic transformer under the operation of the isolation switch to ensure safe and reliable operation of the smart substation.…”

Section: Introductionmentioning

confidence: 99%

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A quantitative research on the level of disturbance to secondary signal ports of electronic voltage transformers under the operation of gas‐insulated switchgear

Wang¹,

Fu²,

Chu³

et al. 2021

High Voltage

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The collectors of electronic transformers has the problem of electromagnetic incompatibility under the operation of disconnecting switches, which limits their wide application in smart grids. To evaluate the maximum level of disturbance that collectors are able to withstand in the stochastic process of switching operation, this work introduces a quantitative approach based on limited test measurements, which can quantify the level of disturbance in the signal acquisition ports of electronic voltage transformers (EVT) in different gas-insulated switchgears (GIS). Based on large numbers of experimental statistical data of the true type simulation experimental platform, the Spearman rank correlation coefficient is used to prove that the amplitude of the disturbance voltage pulse at the secondary side port and the breakdown voltage between the primary side fracture approximately satisfy a linear relationship. Subsequently, the quantile regression model is used to quantify and verify the maximum disturbance level of the secondary side port. Moreover, a solution is proposed to tackle the difficulty in obtaining the breakdown voltage at breaks in the GIS substation field applicatvion, under which the quantified maximum disturbance voltage deviation of secondary ports is only −4.34% by comparison. The research work can further explore the practical value of the measured data in a few tests under GIS substation field conditions and provide references for the subsequent revision of EVT-related standards.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Voltage In Load Sidementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%