Time Series Measurement of Electric Field and Electrical Space Charge Distributions in a Dielectric Liquid

In dielectric liquids subjected to a high electric field, space charges are generated due to various reasons, for example, by the injection of charges from electrodes or by ionization of the impurities and molecules. It is necessary to obtain information regarding the electric field and space charge distributions in insulating materials to ensure effective insulation, however, it is very difficult to obtain information regarding space charge in liquid. We have investigated the electric field distributions in liquid dielectrics using the Kerr elctrooptic effect. Recently, the electric field distribution in the order of milli-seconds has been able to be measured. For 1 ms immediately after an applied voltage, it is thought that space charge layer is almost never formed. So, we measured the electric field distribution for lms at the applied voltage. Then, after a period of time, we measured again the electric field distribution at the second application of the voltage pulse. If there is a difference between the two, it is considered that it is caused by remnant electric charges. So, we report on the evaluation of the remnant charge in liquid.

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Evaluation of space charge in liquid dielectric using kerr electrooptic method

Ihori

Oka

Nagaoka

et al. 2014

Proceedings of 2014 International Symposium on Electrical Insulating Materials

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Kerr optical measurement of electric field strength in gelatinous liquid

Ihori¹,

Sunouchi²,

Tanaka³

et al. 2017

2017 International Symposium on Electrical Insulating Materials (ISEIM)

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Measurement of AC electric field in transformer oil using Kerr effect

Kondo

Yoshimura

Hachisu

et al. 2017

2017 International Symposium on Electrical Insulating Materials (ISEIM)

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Time Series Measurement of Electric Field and Electrical Space Charge Distributions in a Dielectric Liquid

Cited by 3 publications

References 12 publications

Evaluation of space charge in liquid dielectric using kerr electrooptic method

Evaluation of space charge in liquid dielectric using kerr electrooptic method

Kerr optical measurement of electric field strength in gelatinous liquid

Measurement of AC electric field in transformer oil using Kerr effect

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