Overvoltages in secondary circuits of medium-voltage switchgear generated by multiple reignitions of circuit breakers

During switching operations in the high-voltage system, transient voltages and currents occur that can generate overvoltages in the secondary circuits of switchgear. The investigations reported in this article are focused on medium-voltage air-insulated switchgear. The introduced model is able to id...

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Bibliographic Details
Published inIEEE transactions on electromagnetic compatibility Vol. 41; no. 4; pp. 510 - 515
Main Authors Hardt, N., Koenig, D.
Format Journal Article
LanguageEnglish
Published New York, NY IEEE 01.11.1999
Institute of Electrical and Electronics Engineers
Subjects
Air insulation
Applied sciences
Circuits
Connection and protection apparatus
Electrical engineering. Electrical power engineering
Electronic equipment
Exact sciences and technology
Instrument transformers
Joining
Mathematical models
Overvoltage
Switchgear
Wiring
Circuit breaker
Waveform
Substation
Experimental result
Switchgear
High voltage
Electromagnetic compatibility
Frequency response
Modeling
Overvoltage
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Summary:During switching operations in the high-voltage system, transient voltages and currents occur that can generate overvoltages in the secondary circuits of switchgear. The investigations reported in this article are focused on medium-voltage air-insulated switchgear. The introduced model is able to identify the coupling mechanisms. The coupling via the instrument transformers and the secondary wiring to the electronic equipment is described. At first, the frequency-dependent coupling is explained for each secondary component. These are instrument transformers, the secondary wiring, and the electronic equipment. Then it is shown how to combine these components in order to get a complete description of the interfering mechanisms.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0018-9375
1558-187X
DOI:10.1109/15.809855