Evaluation of Electrical Performance and Life Estimation of PPs for HVDC Power Cable

Abstract

Demand and need for the application of high voltage direct current (HVDC) are increasing because of high capacity and long-distance transmission. Research on polypropylene (PP) that can increase the operation temperature compared to existing insulation is constantly being considered. This study aimed to evaluate the electrical performance and estimate the life of HVDC application of PP. In this study, a DC V-t characteristic tests were conducted on three types of PP sheets at a temperature of 110 °C. In addition, a life estimation formula based on the electrical stress was derived and the electrical performances were evaluated. The experimental results show that the life exponent of material mixed with block copolymer, homo polymer and high density polyethylene (HDPE) was 23 and the electrical performance was 17% better than block copolymer, thereby demonstrating the reliability and electrical performance for application of HVDC.

Influence of Space Charge on Dielectric Property and Breakdown Strength of Polypropylene Dielectrics under Strong Electric Field

“…Polypropylene (PP) material has been widely used in high power pulse power supplies, power capacitors, and other energy storage devices with high voltage withstand high insulation impedance, and low loss [1][2][3][4]. In engineering applications, the subjected electric field of polypropylene is high, and the metal electrode injects charge into the thin film, space charge accumulation is an important factor affecting the properties of the material [5][6][7][8].…”