Effect of Humidity on Charge Accumulation on Polymer-Air Interfaces under DC Stress
Paper in proceeding, 2022

Accumulation of charge on polymer-air interfaces stressed with DC voltage has been studied under variable relative humidity (RH). In the experiments, a flat polymeric sample was placed on a grounded copper plate and its open surface was charged by applying a DC voltage to a rod electrode positioned above its center. The charging took place inside a sealed box where relative humidity was fixed by inserting various saturated salt solutions at room temperature. During charging, surface potential distributions were measured at 15 min intervals using a capacitive probe. It was found that the charging became significant at 40% RH for positive polarity and at 51% RH for negative polarity. Above these values, the initial charging rate increased exponentially with relative humidity, and it was substantially greater for positive polarity.

surface charging, humidity, hvdc insulation

Author

Daniel Svensson

Chalmers, Electrical Engineering, Electric Power Engineering

Sarath Kumara

Chalmers, Electrical Engineering, Electric Power Engineering

Olof Hjortstam

Chalmers, Electrical Engineering, Electric Power Engineering

Yuriy Serdyuk

Chalmers, Electrical Engineering, Electric Power Engineering

ICD 2022 - IEEE 2022 4th International Conference on Dielectrics, Proceedings

498-501
978-1-6654-1833-1 (ISBN)

4th International Conference on Dielectrics
Palermo, Italy,

Areas of Advance

Energy

Subject Categories

Other Materials Engineering

Other Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/ICD53806.2022.9863556

More information

Latest update

10/27/2023