Toward the development of HVDC power apparatus, we investigate the charging process on solid insulator in terms of the time transition of conductivity distribution in air for air-solid composite insulation system from DC-on to DC steady-state. By using needle-air-PMMA-plane electrode configuration, we measure the time evolution of surface potential on PMMA due to partial discharge at the needle tip under negative DC voltage. We compare the measured surface potential distribution with the simulation result considering the charge behavior in air. Especially, a novel simulation model considering the charge supply due to DC partial discharge is built. As a result, in air-solid composite insulation system under negative DC application, the time transition of conductivity distribution in air corresponding to the charge accumulation is evaluated quantitatively.
|Title of host publication
|CEIDP 2020 - 2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena
|Institute of Electrical and Electronics Engineers Inc.
|Number of pages
|Published - Oct 18 2020
|2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2020 - Virtual, East Rutherford, United States
Duration: Oct 18 2020 → Oct 30 2020
|Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
|2020 IEEE Conference on Electrical Insulation and Dielectric Phenomena, CEIDP 2020
|Virtual, East Rutherford
|10/18/20 → 10/30/20
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering