Abstract
Recently, eco-friendly energy conversion policies have been being promoted through de-nuclearization and de-coal. For this purpose, a super grid should be built to optimize sustainable renewable energy resources such as solar and wind power. Accordingly, considering the various problems such as technology and cost, a system for efficient energy transmission is required. Hence, research is being actively conducted to apply it, owing to the development of the high voltage direct current (HVDC) system. Among HVDC systems, the cable system is extremely important, in addition to the measurement of the dielectric breakdown strength, space charge, and volume resistivity of insulating materials. The existing resistivity measurement method measures both the volume and surface resistivity using a three-terminal electrode that is used in the international standards of American Society for Testing and Materials (ASTM) D 257 and International Electrotechnical Commission (IEC) 60093. However, the circuit configuration differs depending on the measurement of the volume and surface resistivity; moreover, when a DC voltage is applied to the insulator, a charging current flows and there are multiple samples to be measured, which takes a considerable amount of time. Therefore, in this study, we proposed a new type of resistivity measurement system that is based on the existing three-terminal electrode system. Furthermore, we produced a system capable of simultaneously measuring the volume and surface resistivity. Finally, using this system, we compared and analyzed the volume and surface resistivity of five insulating materials.
Highlights
Both developing and developed countries are facing a transition period for electrification
In this study, based on the existing three-terminal electrode system for measuring the volume and surface resistivity, we present a new type of resistivity measurement system
Resistivity of the dielectric breaking strength, space charge, and volume resistance of materials used for cable insulation is of great importance, and the existing method of measuring resistance is performed
Summary
Both developing and developed countries are facing a transition period for electrification. Because of the increase in power demand in city centers in large cities, several studies have focused on efficiently transmitting electricity between cities, countries, and continents. Over the past few years, an eco-friendly energy conversion policy has been promoted via de-nuclearization and de-coal. For this purpose, a new super grid is required to optimize sustainable renewable energy resources such as solar and wind power. European and G8 leaders have announced that, by 2050, they will cut their countries’ greenhouse gas emissions by 80%. Instead of improving the system of an existing high voltage alternating current (HVAC) grid, they intend to use the HVDC grid to interconnect EU countries
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