Polypropylene Insulation Materials for HVDC Cables

High-voltage direct current (HVDC) transmission plays an important role in the development of sustainable transmission networks and the conversion of energy systems. As an important medium in the transmission system, HVDC cables have become a hot research topic. Flexible DC transmission using HVDC plastic cables is the mainstream direction advocated by the international power grid. Therefore, the demand for high-performance HVDC plastic cables is increasing. Aiming at the development process of thermoplastic environmental polypropylene insulation materials for HVDC cables, the development status and technical bottlenecks of HVDC cable insulation materials were summarized. This chapter discussed the research progress of polypropylene insulation materials from the perspective of the basic structure of polypropylene, intrinsic modification, and its nanocomposite, etc. The necessity and urgency of research and development of insulation materials for HVDC cables were clarified. Finally, the future development direction of HVDC cables was summarized and prospected.