Volume and Surface Resistivity Measurement of Insulating Materials Using Guard-Ring Terminal Electrodes

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.

A Comprehensive Study of Polyurethane Potting Compounds Doped with Magnesium Oxide Nanoparticles

“…The volume resistivity (Ω·cm) and surface resistivity ρ s (Ω) are critical dielectric parameters. Applying a DC electric field to an insulating material produces a current response that can be suitably evaluated by these parameters [ 63 ]. All measurements were performed according to standards IEC 62631-3-1 and 62631-3-2, respectively, with an applied 500 V DC field at an ambient temperature of 23 ± 2 °C.…”

High‐consistency silicone rubber with reduced Young's modulus. An industrial option to dielectric silicone rubber

“…All impedance measurements were performed inside a Faraday cage. The design was initially based on Müller et al 44 in which the sample holder was re‐designed to uniformly apply pressure to the sample and to meet the measure standard requirements (ASTM D150) 45–48 …”

“…The design was initially based on Müller et al 44 in which the sample holder was re-designed to uniformly apply pressure to the sample and to meet the measure standard requirements (ASTM D150). [45][46][47][48] 3 | RESULTS AND DISCUSSION…”

On Surface Resistivity Measurements of Thin Insulation Materials

“…1) allows both volume and surface resistivity measurements with the same setup, it is frequently chosen for flat samples [2,4,[10][11][12]. Apart from the electrode setups in the above-mentioned standards, some modified electrode setups were proposed in literature [13][14][15][16]. Furthermore, investigations on measurement accuracy, uncertainties and potential parasitic influences were carried out by different authors [4,[10][11][12].…”