NDLI: Performance of Hall sensors when used in ground fault protections in MV networks

Content Provider	IEEE Xplore Digital Library
Author	Miedzinski, B. Szymanski, A. Dzierzanowski, W. Wojszczyk, B.
Copyright Year	2004
Description	Author affiliation: Wroclaw Univ. of Technol., Poland (Miedzinski, B.; Szymanski, A.; Dzierzanowski, W.; Wojszczyk, B.)
Abstract	Ground faults are dominant among disturbances of medium voltage networks and cause numerous problems during their lifetime. Accurate detection and clearing of single phase short-circuits are especially difficult in compensated and/or isolated networks (6-30 kV) with small fault current value. This problem is of particular importance in strip mines due to frequent variations of the network configuration (thus respective change of parameters) under operation. We have found that it is possible to obtain a simple structure of the reliable ground fault protections when applying Hall sensors as measuring elements. In the paper, structure, principle of operation, and investigated results of the overcurrent as well as directional protections are presented and discussed. The investigations were carried out under steady and transient states using special laboratory equipment and verified under real short-circuit conditions in a strip mine. On the basis of the results, the conclusions about the possibility of applications of such protections in practice are formulated.
Sponsorship	IEEE PES IEE Cigre NGT EDF Energy WUHAN HI-TECH
Starting Page	753
Ending Page	757
File Size	737106
Page Count	5
File Format	PDF
ISBN	1860433650
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-09-06
Publisher Place	UK
Access Restriction	Subscribed
Rights Holder	UWE
Subject Keyword	Intelligent networks Strips Hall effect devices Magnetic cores Magnetic sensors Fault detection Power system protection Medium voltage Transformers Fault currents
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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