| Title |
A Study on the Electric Field Mitigation of 500kV HVDC Polymer Insulators |
| Authors |
Seunghee O ; Minkyung Jeong ; Bonhyuk Ku ; Hobin Lee ; Hyoungku Kang |
| DOI |
http://doi.org/10.5207/JIEIE.2022.36.12.017 |
| Keywords |
Corona ring; DC insulator; Electric field mitigation; Grade ring; HVDC |
| Abstract |
An HVDC(high voltage direct current) is economical owing to its excellent power transmission efficiency and a low insulation class compared with HVAC(high voltage alternative current). In addition, HVDC is known as a high efficiency green technology because power systems with different frequencies can be connected asynchronously. Therefore, research on the HVDC is being actively conducted. In order to develop HVDC transmission lines, it is necessary to secure insulation design technology for DC insulators. DC has different properties from AC due to the presence of space charge and the temperature dependence of conductivity. However, until now, there is no standard for the insulation design of DC insulators. In this study, the difference in insulation design was verified through AC electric field and DC electric field analysis, and a corona ring design was derived to improve the electrical stability of the 500kV DC insulator. |