Enhancing the performance of high voltage direct current power cables by studying space charge accumulation in their synthetic polymeric insulation

合成聚合物绝缘体已被证明在高压交流电力传输电缆中非常成功，因此电缆制造商已寻求将其用于高压直流（HVDC）电缆中，对高压直流（HVDC）电缆的需求迅速增长。然而，目前这种电缆中空间电荷的积累严重限制了最大工作电压和传输功率。几乎所有这些空间电荷都是由于绝缘中的温度梯度造成的。我们将分析聚乙烯和其他合成聚合物中的空间电荷分布，并获得基础科学数据，这些数据将为HVDC电缆的设计提供信息，从而大大提高性能。

Synthetic polymeric insulation has proved very successful in high voltage alternating current power transmission cables, and cable manufacturers have therefore sought to use it in high voltage direct current (HVDC) cables, for which there is a rapidly growing demand. Yet the accumulation of space charge in such cables presently severely limits the maximum operating voltage and transmitted power. Nearly all this space charge is due to the temperature gradient in the insulation. We will analyze space charge profiles in polyethylene and other synthetic polymers, and derive basic scientific data which will inform the design of HVDC cables with greatly enhanced performance.