文章摘要
典型表面状态下的污秽绝缘子空间电场特性研究
Study on the Electric Field Characteristics of Polluted Insulator Space under Typical Surface State
投稿时间:2019-10-08  修订日期:2019-11-07
DOI:
中文关键词: 绝缘子  污闪  有限元  空间电场  运行状态
英文关键词: Insulator  pollution flash  finite element  space electric field  operating state
基金项目:江苏省自然科学(BK20181021),国家重点研发计划项目(2016YFB0900904)。
作者单位E-mail
黄宵宁 南京工程学院电力工程学院 825042433@qq.com 
刘锦   
杨成顺   
毕晓甜   
高嵩   
张东东 南京工程学院电力工程学院 zhangdd@njit.edu.cn 
摘要点击次数: 77
全文下载次数: 59
中文摘要:
      实时监测绝缘子运行状态,可以有效地保证输配电外绝缘的安全稳定运行。目前通常依靠监测绝缘子表面泄漏电流来实现污闪预警,作为一种接触式在线监测手段,其在可靠性、便捷性等方面仍有很大的提升空间。而已有研究指出,不同运行状态下污秽绝缘子其空间电场分布会发生变化,电场作为重要的电气参量之一,可通过非接触的方式有效获取。因此,本文研究典型表面状态下染污绝缘子空间电场分布特性,首先利用有限元仿真软件建立了普通支柱绝缘子的静电场仿真模型,对比分析了干燥、湿润、放电情况下的绝缘子周围空间电场的幅值大小及变化规律;最后利用人工污秽试验,对污闪放电过程中的绝缘子空间电场进行测试,并与仿真结果进行对比分析。研究结果表明,不同表面状态下的绝缘子空间电场所反映的幅值大小差异明显,在表面湿润及有电弧爬电的情况下,空间电场垂直分量分别增长近50%和20%。研究结果可为输配电外绝缘的状态监测提供新思路。
英文摘要:
      Real-time monitoring of the operating state of the insulator can effectively ensure the safe and stable operation of the external insulation of the transmission and distribution. At present, it usually relies on monitoring the surface leakage cur-rent of the insulator to realize the flashover warning. As a contact online monitoring method, it still has much room for improvement in terms of reliability and convenience. However, it has been pointed out that the spatial electric field distri-bution of the contaminated insulator changes under different operating conditions. The electric field is one of the im-portant electrical parameters and can be effectively obtained through non-contact. Therefore, this paper studies the electric field distribution characteristics of soiled insulators under typical surface conditions. Firstly, the electrostatic field simula-tion model of common pillar insulators is established by using finite element simulation software. The amplitude of the electric field around the insulator under dry, wet and discharge conditions is compared and analyzed. The value of the val-ue and the law of change; Finally, using the artificial contamination test, the electric field of the insulator in the process of pollution flashover is tested and compared with the simulation results. The results show that the magnitude of the ampli-tude reflected by the insulator space in different surface states is obvious. Under the condition of surface wetting and arc creepage, the vertical component of the spatial electric field increases by nearly 50% and 20%, respectively. The research results can provide new ideas for condition monitoring of transmission and distribution external insulation.
查看全文   查看/发表评论  下载PDF阅读器
关闭