| 特高压避雷器用ZnO压敏电阻电压梯度限值的探讨 | |
| 胡军 ; 何金良 ; 刘俊 ; 龙望成 ; HU Jun ; HE Jin-liang ; LIU Jun ; LONG Wang-cheng | |
| 2010-06-10 ; 2010-06-10 | |
| 关键词 | 特高压避雷器 ZnO压敏电阻 电压梯度 能量吸收密度 UHV arrester ZnO varistor voltage gradient energy absorption density TM862 TN384 |
| 其他题名 | Analysis on Voltage Gradient Limitation of ZnO Varistor in Ultra High Voltage Arrester |
| 中文摘要 | 为了研制性能优异的特高压避雷器,笔者对实际所需ZnO压敏电阻的电压梯度是否存在限值进行了研究,并结合特高压避雷器的实际应用需求,详细讨论了ZnO压敏电阻的电压梯度限值的相关问题。研究表明,对适用于特高压避雷器的ZnO阀片,其电压梯度不仅受到特高压避雷器绝缘间距、通流容量等外在因素的限制,同时也受到ZnO阀片能量吸收密度的限制。在现有生产制造能力的条件下,特高压避雷器采用ZnO阀片的电压梯度越高,阀片所必须达到的能量吸收密度也越高。笔者通过理论分析与计算得出,特高压避雷器适用ZnO阀片的方波能量吸收密度理论极限值为517 J/cm3,对应的电压梯度理论极限值为686 V/mm。对于特高压瓷套、复合外套、GIS罐式避雷器所需ZnO阀片,最理想的电压梯度分别为213、300、426 V/mm,相应的能量吸收密度要求至少分别为150、226、301 J/cm3。; In order to develop an excellent performance UHV arrester,the author have studied the existence of limits of the practical requirements of ZnO varistor voltage gradient,and combining with the practical application demand of the UHV arrester,discussed the ZnO varistor voltage gradient limits related issues in detail.Research shows that the voltage gradients of ZnO varistors in UHV arresters are limited not only by the outer facts such as insulation distance and rated current of UHV arresters,but also by the inner fact of energy absorption densities of ZnO varistors.Higher voltage gradients of the ZnO varistors lead to higher requirements for their energy absorption densities.The theoretical limitation of energy absorption density of a ZnO varistor is 517 J/cm3,and the related theoretical limitation of its voltage gradient is 686 V/mm.For the ZnO varistors in the UHV arresters with porcelain insulation,composite insulation or GIS insulation,their ideal voltage gradients should be 213,300 V/mm or 426 V/mm,while their energy absorption densities should be 150,226 J/cm3 or 301 J/cm3 at least,respectively.; 国家自然科学基金(50425721、50737001) |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/62548]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 胡军,何金良,刘俊,等. 特高压避雷器用ZnO压敏电阻电压梯度限值的探讨[J],2010, 2010. |
| APA | 胡军.,何金良.,刘俊.,龙望成.,HU Jun.,...&LONG Wang-cheng.(2010).特高压避雷器用ZnO压敏电阻电压梯度限值的探讨.. |
| MLA | 胡军,et al."特高压避雷器用ZnO压敏电阻电压梯度限值的探讨".(2010). |
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