Application of Electrical Insulating System of Superconducting Power Apparatus by Polymeric Composite Materials

高分子复合材料在超导电力设备电绝缘系统中的应用

• 批准号: 10450104
• 负责人: KOSAKI Masamitsu
• 金额: $ 9.02万
• 依托单位: GIFU NATIONAL COLLEGE OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10450104/
• 关键词: ethylene-propylene rubber; filler; treeing resistance; performance of electrical insulation; cryogenic temperature; cryogenic power apparatus; 超伝導電力機器

The investigators have been studying the application of polymeric materials (ethylene-propylene rubber (EPR)) to electrical insulation system of superconducting power apparatus. At cryogenic temperature, there are many practical insulation studies on fluids such as liquid nitrogen or liquid helium but scarce studies on the solid insulation enabling a high voltage design.The results are summarized as follows :(1) The EPR insulation did not suffer from the mechanical failure at the cooling down to liquid nitrogen temperature around the fairly rough surface of conductor cylinder. High insulation reliability of EPR with filler is expected during long term operation at cryogenic temperature.(2) DC short-circuit tree initiation voltage at cryogenic temperatures is much higher than that at room temperatures. This may be attributed to loss carrier injection from electrode and gives a strong incentive to design the electrical insulation of superconducting power apparatus.(3) The DC breakdown voltage of cryogenic gas with and without spacer has been measured. The breakdown voltage obeys Paschen's law and changes only with the product of density and thickness. In low density-thickness product range, surface breakdown can hardly occur before the gap breakdown develops.The results obtained in this study open an avenue to the application of polymeric materials (EPR) to electrical insulation system of superconducting power apparatus. EPR seem to be promising materials for solid insulation in the cryogenic region.

研究人员一直在研究聚合物材料（乙丙橡胶（EPR））在超导电力设备电气绝缘系统中的应用。在低温下，对液氮、液氦等流体的绝缘研究较多，但对固体绝缘的研究较少，主要研究结果如下：（1）EPR绝缘在冷却至液氮温度时，导体圆柱表面粗糙度较大，不会发生机械失效。在低温下长期运行时，要求填充EPR具有高的绝缘可靠性。(2)低温下的直流短路树引发电压远高于室温下的直流短路树引发电压。这可能归因于电极的损耗载流子注入，并为超导电力设备的电绝缘设计提供了强有力的激励。(3)测量了有、无隔离层时低温气体的直流击穿电压。击穿电压服从帕邢定律，只随密度和厚度的乘积而变化。在低密度-厚度积范围内，在差距击穿发展之前，几乎不会发生表面击穿，这一研究结果为聚合物材料（EPR）在超导电力设备电绝缘系统中的应用开辟了一条途径。EPR是一种很有前途的低温固体绝热材料。

项目成果

KOSAKI Masamitsu: "Solid insulation and its deterioration"Cryogenic. 38, No.11. 1095-1104 (1998)

小崎正光：“固体绝缘及其恶化”低温。

TOKORO Tetsuro: "Study of Surface Degradation Diagnosis Method of Silicone Rubbers"Proceedings of 31th Symposium on Electrical and Electronic Insulation Materials and Applications in Systems. F-4. 145-148 (1999)

TOKORO Tetsuro：《硅橡胶表面劣化诊断方法的研究》第31届电气电子绝缘材料及系统应用研讨会论文集。

M.Nagao: "Electrical Insulation Characteristic of paper-Ice Composite Insulating System in Liquid Nitrogen"Proceedings of 1999 IEEE 13^<th> ICDL (99CH36213). Vol.1. 462-465 (1999)

M.Nagao：“液氮中纸-冰复合绝缘系统的电绝缘特性”1999 IEEE 13^<th> ICDL (99CH36213) 论文集。

T. Tokoro: "Image Analysis of Hydrohobicity of Silicone Rubber Insulator"1999Annual Report, CEDIP(99CH36319). Vol. 2. 763-766 (1999)

T. Tokoro：“硅橡胶绝缘体疏水性的图像分析”1999年年度报告，CEDIP(99CH36319)。

MINODA Atsushi: "Breakdown Characteristics of Gaseous and Liquid Nitrogen in Parallel Electrodes System with Small Gap Spacer"Proceedings of 1998 ISEIM (98TH8286). 1. 317-320 (1998)

MINODA Atsushi：“带小间隙垫片的平行电极系统中气态和液氮的击穿特性”1998 ISEIM 论文集 (98TH8286)。