Review on Charge Generation, Measurement and Dissipation in Large-length HVDC Cable

Carbon emission reduction, as one of the core drivers of energy transformation, can effectively promote clean energy development and mitigate the global greenhouse effect. In the context of the development of the global energy internet, large-length HVDC cables for long-distance and cross-regional power transmission occupy an essential position in the power internet. However, the accumulation of electric charges in the large-length HVDC cables is inevitable, and would threaten the safe operation of the cables, reduce their service life and might even cause insulation fault. Therefore, it is indispensable to study the electric charges in large-length HVDC cables. This article provides a brief overview of electric charge generation, measurement and dissipation in HVDC cables, and summarizes the important research issues in recent years, which can provide informative guide for both online monitoring and life assessment of large-length HVDC cables.