NDLI: Positive Switching Impulse Discharge Performance and Voltage Correction of 1-m Rod-Plane Air Gap

Content Provider	IEEE Xplore Digital Library
Author	Jianlin Hu Xingliang Jiang Shaohua Wang Zhijin Zhang Caixin Sun Shu, L. Jun Wang
Copyright Year	1986
Abstract	Switching impulse discharge performance of air gaps at high altitudes, which is a fundamental in the extremely high voltage external insulation design, remains an unsolved key technology across the world. Due to the limited applicable range of "g" parameter method recommended by IEC Publication 60-1(1989), this paper aims to explore the relationship between positive switching impulse 50% discharge voltage U ₅₀ of rod-plane air gaps and atmospheric parameters, and proposes two new voltage correction methods based on the parameter "g" and the atmospheric pressure ratio, respectively. The two methods have been proved by the experimental investigations carried out on 1-m rod-plane air gap both in the artificial climate chamber and at three spots of different high altitudes in this study. The results show that, if the additional influence of absolute humidity is considered, the positive switching impulse 50% discharge voltage U₅₀ of rod-plane air gaps is a power function of relative pressure and relative air density; the "g" parameter method in IEC Publication 60-1(1989) is not applicable to the regions with an altitude above 2000 m or the condition of h/delta>15 g/m³; compared with the correction method based on the "g" parameter method, the correction method based on relative atmospheric pressure has a wider applicable range and less error; when the absolute humidity increases 1 g/m³, U₅₀ varies within the range of 1.0%-1.15%
Sponsorship	IEEE Power Engineering Society
Starting Page	1247
Ending Page	1254
Page Count	8
File Size	818915
File Format	PDF
ISSN	08858977
Volume Number	22
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Voltage Humidity Air gaps IEC standards Impulse testing Sun Error correction Temperature Insulation testing Educational technology impulse discharge Air gap atmospheric parameters correction high altitude humidity
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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Positive Switching Impulse Discharge Performance and Voltage Correction of 1 meter Rod-plane Air Gap

Positive Switching Impulse Discharge Performance and Voltage Correction of Rod-Plane Air Gap Based on Tests at High-Altitude Sites

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