Highly Reliable Insulation Techniques for HTS Cable under Dynamic and Composite Stress Environment

动态复合应力环境下​​高温超导电缆高可靠绝缘技术

• 批准号: 18360135
• 负责人: HAYAKAWA Naoki
• 金额: $ 10.05万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18360135/
• 关键词: HTS cable; High voltage; Large current; Liquid nitrogen; Quench; Electrical insulation; Partial discharge; Breakdown; 交流電圧; インパルス電圧; 気泡

High temperature superconducting (HTS) cables have been developed, and their electrical insulation design techniques have being established. However, the electrical insulation performance under operational condition of HTS cables has not yet been clarified. For the reliable and rational insulation design of HTS cables, partial discharge (PD) characteristics of liquid nitrogen (LN_2)/polypropylene (PP) laminated paper composite insulation system for HTS cables should be understood and systematized. From the above viewpoint, we investigated PD generation characteristics under different operational conditions of HTS cables as follows:(1) Quench condition of HTS cables:The thermal stress due to quench of HTS cables would be transiently superimposed on the electric field stress under the operating voltage of HTS cables. Such electrical insulation characteristics under thermal/electrical combined stresses can be referred to as the “quench-induced PD characteristics" of HTS cables. Experiment … More al results revealed that the quench品nduced PD could be generated, even under the intrinsic or static PD inception voltage without the quench. The criteria of the thermal/electrical combined stress level for quench-induced PD inception were quantified for different LN_2 pressures and fault durations under sub-cooled condition.(2) Lightning surge invasion into HTS cables:The impulse voltage would be transiently superimposed on the operating ac voltage of HTS cables. Experimental results revealed that the ac/impulse superimposed voltage could trigger PD in the electrical insulation layers of HTS cables, which would also cause consecutive PD under the subsequent ac voltage. Such PD may be attributed to the residual gas bubbles in LN_2 generated by thermal energy of PD under the ac/impulse superimposed voltage. The consecutive ac PD generation characteristics were evaluated in terms of both the ac/impulse superimposed instantaneous voltage and the subsequent ac voltage. As the result, a criterion to discriminate the consecutive ac PD was identified for different ac/impulse superimposed voltages. Less

已经开发了高温超导（HTS）电缆，并建立了其电绝缘设计技术。但是，尚未阐明HTS电缆操作条件下的电绝缘性能。对于HTS电缆的可靠和合理的绝缘设计，应理解和系统化的HTS电缆的液氮（LN_2）/聚丙烯（PP）层压板复合绝缘系统的部分放电（PD）特征。从上面的角度来看，我们在HTS电缆的不同操作条件下研究了PD产生特性，如下所示：（1）HTS电缆的淬火状况：HTS电缆淬火引起的热应力将在HTS电缆的工作电压下瞬时叠加在电场应力上。在热/电气组合应力下的这种电绝缘特性可以称为HTS电缆的“淬火诱导的PD特性”。实验…更多的结果表明，即使在没有淬火的情况下，也可以生成淬灭产物衍生的PD，即使在固有或静态的PD插入电压下也是如此。在亚冷却条件下，对不同的LN_2压力和故障持续时间进行了淬火引起的PD启动的热/电气组合应力水平的标准。（2）闪电激增侵入HTS电缆：脉冲电压将在HTS Cables的HTS Cables Oct AC Cables的操作AC电压上进行短暂叠加。实验结果表明，AC/脉冲叠加的电压可能会触发HTS电缆的电绝缘层中的PD，这也会在随后的AC电压下导致连续的PD。这样的PD可能归因于在AC/脉冲叠加电压下由PD热能产生的LN_2中的残留气泡。通过AC/脉冲叠加的瞬时电压和随后的AC电压评估了连续的AC PD生成特性。结果，针对不同的AC/IMPULSE叠加电压确定了区分连续AC PD的标准。较少的

项目成果

高温超電導ケーブルの絶縁構成における熱/電界複合ストレス下の部分放電特性

高温超导电缆绝缘结构中热/电场联合应力下的局部放电特性

• 发表时间: 2006
• 期刊: 放電学会年次大会
• 作者: Y.;Kitano;S.;Katsuike;M.;Tanpo;M.;Imade;N.;Miyosbi;F.;Kawamura;M.;Yoshimura;Y.;Kitaoka;Y.;Mori;T.;Sasaki;上山進一
• 通讯作者: 上山進一

過冷却液体窒素/積層テープ複合絶縁構成における熱/電界複合ストレス下の部分放電特性

过冷液氮/层压胶带复合绝缘结构中热/电场联合应力下的局部放电特性

• 发表时间: 2006
• 期刊: 電気関係学会東海支部連合大会
• 作者: Y.;Kitano;S.;Katsuike;M.;Tanpo;M.;Imade;N.;Miyosbi;F.;Kawamura;M.;Yoshimura;Y.;Kitaoka;Y.;Mori;T.;Sasaki;上山進一;上山進一
• 通讯作者: 上山進一

Impulse Partial Discharge Measurement of LN_2/Polypropylene Laminated Paper Composite Insulation System by Using High Pass Filter

利用高通滤波器测量LN_2/聚丙烯层压纸复合绝缘系统的脉冲局部放电

• 发表时间: 2008
• 作者: R. Yamaguchi;et al.
• 通讯作者: et al.

高温超電導ケーブルモデルにおける交流/インパルス重畳電圧印加時の部分放電特性

高温超导电缆模型施加交流/脉冲叠加电压时的局部放电特性

• 发表时间: 2009
• 作者: Y.;Kitano;S.;Katsuike;M.;Tanpo;M.;Imade;N.;Miyosbi;F.;Kawamura;M.;Yoshimura;Y.;Kitaoka;Y.;Mori;T.;Sasaki;上山進一;上山進一;山口竜太郎
• 通讯作者: 山口竜太郎

Partial Discharge Activities under AC Voltage Superimposed with Impulse Voltage for HTS Cable Model

高温超导电缆模型交流电压叠加脉冲电压下的局部放电活动

• 发表时间: 2009
• 作者: R. Yamaguchi;et al.
• 通讯作者: et al.