Journal ArticleDOI
A new method of electric field measurements in corona discharge using Pockels device
Kunihiko Hidaka,Hiroyuki Fujita +1 more
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TLDR
In this article, an optical method was applied to the measurement of the electric field in a needle-to-plane gap of 10 cm with a positive dc corona, and the field distortion was clearly observed in a wide range of applied voltages between 30 and 98% of the breakdown voltage 52 kV.Abstract:
The investigations of the dc electric field distorted by space charges have been made by means of the optical method using a Pockels device. The Pockels device was rotated to eliminate field disturbances caused by surface charges accumulated on it. The present method has the advantage of directly measuring the electric field in a dc corona discharge. The method was successfully applied to the measurement of the electric‐field distribution in a needle‐to‐plane gap of 10 cm with a positive dc corona. The field distortion was clearly observed in a wide range of applied voltages between 30 and 98% of the breakdown voltage 52 kV. It was found that the electric field inside the corona streamers was 3.5 kV/cm, while 14 kV/cm near the tip of the streamers. Furthermore, the experimental results were theoretically confirmed at the relatively low voltage.read more
Citations
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Journal ArticleDOI
Acoustic and optical methods for measuring electric charge distributions in dielectrics
TL;DR: In this paper, a review of the recent advances in acoustic and optical methods for measuring charge distributions in dielectrics is given, which mainly covers the past research activities associated with that at our laboratory and some of the results that enabled us to gain physical insights into the charge dynamics within solid plate samples and coaxial cables.
Journal ArticleDOI
Development and Application of Integrated Optical Sensors for Intense E-Field Measurement
TL;DR: This paper comprehensively reviews the development and applications of several types of IOESs over the last 30 years, showing that the MZI has higher sensitivity, the CI has a controllable optical bias, and the CPI has better temperature stability.
Journal ArticleDOI
Progress in Japan of space charge field measurement in gaseous dielectrics using a Pockels sensor
TL;DR: The practical application of Pockels voltage and field sensors to electric power networks is expected to continue to increase not only in Japan but also throughout the world, with the introduction of optical telecommunication technology as mentioned in this paper.
Journal ArticleDOI
ac surface discharge on dielectric materials observed by advanced Pockels effect technique
TL;DR: In this paper, a method for visualization and quantification of the latent electric charge image on dielectric materials has been developed using Pockels effect of a BSO (Bi12SiO20) single crystal, a charge coupled device camera recording system, and a computer image processing technique.
Journal ArticleDOI
Fiber-optic sensing of electric field components
Klaus Bohnert,J. Nehring +1 more
TL;DR: Symmetry properties of the converse piezoelectric effect are investigated for their use in fiber-optic sensing of individual electric field components and the sensitivity of the sensor to a specified field component is experimentally verified.
References
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Journal ArticleDOI
La charge des particules sphériques dans un champ ionisé
M. Pauthenier,M. Moreau-Hanot +1 more
TL;DR: In this paper, the conditions for the existence of a charge limite in a cylindre traverse and the valeur of this charge have been investigated in the presence of spheriques conductrices of rayon.
Journal ArticleDOI
Analysis of Corona Losses on DC Transmission Lines: I - Unipolar Lines
TL;DR: In this paper, a numerical iterative method of computing the actual charge distribution around the conductor in the corona is presented, which is applicable to any general configuration for which the space-charge-free field can be calculated.
Journal ArticleDOI
Characteristics of the stabilized glow discharge in air
Ronald Waters,W. B. Stark +1 more
TL;DR: In this paper, a modified form of the Townsend voltage-current characteristic has been derived which is in good agreement with the measured values for all conductor diameters, and the surface gradient is found to be constant at about 5% below the onset value after establishment of the glow discharge, and to be independent of further voltage increase.
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