Modelling Space Charge in HVDC Cable Insulation
The design of high-voltage direct-current extruded cable is one of the most challenging issues in the cable industry, as the electric field distribution across the insulation can be strongly affected by the presence of space charge, which can subsequently affect its long-term reliability and life expectancy. In this study, the bipolar charge transport model was utilized to calculate space charge and field distribution in a polymeric cable insulation, and the result was compared with the one obtained by the conductivity model which is commonly used in the cable industry. It is shown that the simulation results of the bipolar charge transport model are more comparable with the previous experimental work, and the shortcomings of the conductivity model are presented. At last, the feasibility and potential issues of the new method are discussed for further development.
KeywordsHVDC cable Field distribution Bipolar charge transport model
We would like to acknowledge the financial support from the technology project of State Grid Shaanxi Electric Power Company [5226KY16001G] and [2018GY-001].
- 3.Chen, G., Hao, M., Xu, Z., Vaughan, A., Cao, J., Wang, H.: Review of high voltage direct current cables. 10 Csee J. Power Energy Syst. 1(2), 9–21 (2015)Google Scholar
- 4.Morshuis, P.H.F., Bodega, R., Fabiani, D., Montanari, G.C., Dissado, L.A., Smit, J.J.: Calculation and measurement of space charge in MV-size extruded cables systems under load conditions. In: IEEE International Conference in Solid Dielectrics, ICSD 2007, pp. 502–505 (2007)Google Scholar
- 11.Bodega, R.: Space charge accumulation in polymeric high voltage DC cable systems. PhD dissertation, Delft University of Technology (2006)Google Scholar