Direct-current cable insulation thickness design method

• Main Authors: WANG CHUANBO, JU JI-EUN, ZHOU BAIJIE, XUE JIAN, CHEN LONGXIAO, GAO KAI, YANG LIMING, CAI FANYI, LI DONG, ZENG HAO
• Format: Patent
• Language: Chinese; English
• Published: 15.07.2022
• Subjects: BASIC ELECTRIC ELEMENTS; CABLES; CONDUCTORS; ELECTRICITY; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING ORDIELECTRIC PROPERTIES

The invention discloses a direct-current cable insulation thickness design method, which considers space charge influence, introduces space charge influence factors into a direct-current cable insulation thickness calculation method, and further considers factors of non-uniform electric field distribution of an insulation layer caused by temperature difference. An electric field distortion factor is introduced into a calculation method of the insulation thickness of the direct-current cable, and meanwhile, a calculation method of a space charge influence factor and an insulation electric field distortion factor is provided. According to the method, potential safety hazards caused by operation of the direct-current cable can be avoided, and meanwhile the phenomena that the direct-current cable is large in local electric field and prone to breakdown faults can be avoided. 本发明公开了一种直流电缆绝缘厚度设计方法，考虑空间电荷影响，在直流电缆绝缘厚度的计算方法中引入空间电荷影响因子，同时进一步考虑因温差而导致绝缘层电场分布不均匀因素，在直流电缆绝缘厚度的计算方法中引入电场畸变因子，同时提出了空间电荷影响因子和绝缘电场畸变因子的求取方法。本发明方法能够