• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2015, Vol. 36 ›› Issue (5): 45-51.doi: 10.3969/j.issn.1000-7229.2015.05.008

• 输配电技术 • 上一篇    下一篇

不同类型RTV憎水性及闪络特性分析

黄青丹1,尤金伟2,宋浩永1,吴培伟1,张志劲2,蒋兴良2   

  1. 1. 广州供电局电力试验研究院,广州市 510000;2. 输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆市 400044
  • 出版日期:2015-05-01
  • 作者简介:黄青丹(1982),男,理学硕士,高级工程师,研究方向为化学成分分析; 尤金伟(1989),男,硕士研究生,研究方向为输电线路外绝缘技术; 宋浩永(1985),男,工学硕士,助理工程师,研究方向为低压电器; 吴培伟(1991),男,助理工程师,研究方向为输电线路外绝缘技术; 张志劲(1976),男,博士、教授、博士生导师,研究方向为输电线路外绝缘及其绝缘配合; 蒋兴良(1961),男,博士、教授、博士生导师,研究方向为输电线路外绝缘技术及电网防冰技术。
  • 基金资助:

    国家创新研究群体基金(51321063)

Hydrophobicity and Flashover Characteristics  Analysis of Various Types of RTV

HUANG Qingdan1, YOU Jinwei2,  SONG Haoyong1, WU Peiwei1, ZHANG Zhijin2, JIANG Xingliang2   

  1. 1. Electrical Power Test & Research Institute of Guanzhou Power Supply Bureau, Guanzhou 510000, China;2. State Key Laboratory of Power Transmission Equipment & System Security and New Technology (Chongqing University), Chongqing 400044, China
  • Online:2015-05-01
  • Supported by:

    Project Supported by the Funds for Innovative Research Groups of China (51321063)

摘要:

室温硫化硅橡胶(room temperature vulcanized silicone rubber,RTV)具有很好的防污性能,在电力系统中已广泛应用,但不同类型的RTV涂料防污性能不同。测定了不同RTV涂料的静态接触角,并对RTV涂料污闪后的憎水性恢复特性以及交直流下的闪络特性进行了试验分析。试验结果表明,长效型RTV涂料(P-RTV)的憎水性大于高自洁型RTV涂料(S-RTV);在同一污秽度下P-RTV污闪电压比S-RTV高,说明更强的憎水性意味着更高的防污性能。此外,沿面闪络会导致P-RTV涂料憎水性暂时性的部分丧失,污闪电压幅值下降11.1%~21.1%,此部分丧失一段时间后可恢复,而S-RTV涂料憎水性的丧失部分却是不可恢复的;RTV涂料表面均有不同程度灼烧痕迹且放电痕迹分布在与高压端相连的绝缘子下表面,这是导致表面防污性能下降的因素之一。直流电压下RTV涂料表面灼烧痕迹明显,抗漏电起痕性能较弱。P-RTV综合性能优于S-RTV,因此实际使用应优先考虑P-RTV。研究结果对RTV涂料的研制和使用具有一定的指导意义。

关键词: 绝缘子, RTV涂料, 静态接触角, 憎水性, 污闪电压, 泄漏电流

Abstract:

Room temperature vulcanized silicone rubber (RTV) has good antifouling properties, which has been widely used in the power system, but different types of RTV coatings antifouling performances are unlike. Static contact angle of different RTV coatings were determined and the hydrophobicity recovery properties after pollution flashover and AC/DC flashover characteristics were tested and analyzed. The test results show that the hydrophobicity of long-acting RTV coating (P-RTV) is stronger than that of high self-cleaning RTV coating (S-RTV); and under the same pollution degree, the pollution flashover voltage of P-RTV is higher than that of S-RTV, which shows stronger hydrophobicity means higher antifouling performance. In addition, surface flashover can cause the temporary loss of P-RTV hydrophobicity, which will lead flashover voltage amplitude decreasing 11.1 %-21.1%, while the loss of S-RTV coatings hydrophobicity is unrecoverable. The surfaces of RTV coatings all have burning marks in varying degrees distributed on the lower surface of the insulator connected with the high voltage, which is one of the factors causing anti-pollution performance decreasing. And the signs of burning on RTV surface are more obvious under DC voltage; its dielectric tracking performance is poor. Moreover, the comprehensive performance of P-RTV is better than that of S-RTV, so the priority of actual application should be given to P-RTV. The result has a certain guiding significance to the development and use of RTV coatings.

Key words: insulator, RTV coating, static contact angle, hydrophobicity, pollution flashover voltage, leakage current

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