Discuss - Discussion of Rural Alaska Electric Power Quality Excerpts of paper by J.D Aspnes B.W Evans and R.P Merrit Presented at the IEEE PES

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Discussion of “Rural Alaska Electric Power Quality” Excerpts of paper by J.D. Aspnes, B.W. Evans and R.P. Merrit Presented at the IEEE PES Summer Meeting, 1984 Discussion by F.D. Martzloff, submitted August 1984 Reproduced, with special permission, from IEEE Transactions PAS-104 , March 1985 NOTE: This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of NIST's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by sending a blank email message to [email protected] . By choosing to view this document, you agree to all provisions of the copyright laws protecting it. Significance: Part 3 – Recorded surge occurrences and surveys Part 5 – Monitoring instruments The paper reports an extensive project of monitoring power quality performed with typical instruments available in the mid-eighties. Note that during the period of monitoring, the proliferation of low-voltage metal-oxide varistors had probably not yet involved all the sites covered by the monitoring. Nevertheless, the results indicated that the maximum surges ever recorded in this project had only a 368 V peak. This somewhat surprising result needed an explanation. The discussion offers such an explanation: the monitors that were used for the survey had a built-in varistor in their power supply input, a reasonable precaution from the designers of the instrument. With hindsight – too late for the researchers – it was realized that the power supply of the monitor was plugged in the same receptacle from which the monitored voltage was acquired: small wonder then, that the maximum surge voltage that could be observed was simply the let-through voltage of the varistor. For the purposes of this discussion, only the most relevant pages concerned with surge occurrences have been reproduced. The full copyrighted paper is a rich source of data on other disturbances.
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608 IEEE Transactions on Power Apparatus and Systems, Vol. PAS-104, No. 3, March 1985 RURAL ALASKA ELECTRIC POWER QUALITY 3. D, Aspnes, Senior Member, IEEE B. W. Evans, Student Member, IEEE R. P. Merritt, Member IEEE Electrical Engineering Department University of Alaska Fairbanks, A1 aska 99701 Abstract - Poor quality electric power has tradi- tionally been blamed for electrical and electronic equipment malfunctions and failures in rural Alaskan communities. This paper reports results of a recently completed project in which disturbance analyzers provide the first comprehensive power quality data from A1 askan v,i 11 ages.
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This note was uploaded on 09/28/2010 for the course EPS 090229 taught by Professor Nxhviet during the Winter '10 term at Hanoi University of Technology.

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Discuss - Discussion of Rural Alaska Electric Power Quality Excerpts of paper by J.D Aspnes B.W Evans and R.P Merrit Presented at the IEEE PES

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