变压器局放检测UHF传感器设计汇编.docxVIP

变压器局放检测UHF传感器设计  PAGE \* MERGEFORMAT 27 【摘要】 随着电力系统向高压大容量方向发展，电力变压器的电压等级和单台容量也在不断提高，一旦发生事故，将会造成大面积停电，甚至危及整个电力系统的稳定运行，经济损失巨大。统计表明绝缘故障是引发变压器事故的重要原因之一，而局部放电（局放）是绝缘劣化失效的重要征兆。局放在线监测能够有效地反映变压器绝缘状况，近年来成为研究热点。根据电力变压器的放电特性，本文通过cst电磁仿真软件设计并研制了一种超高频传感器，即阿基米德双螺旋天线。该传感器的有效频率范围为500～1500MHz。它可以被用于检测在有效频带范围内的超高频局部放电信号，这对电力变压器超高频局部放电检测技术的研究是非常有用的。 关键字：局部放电；传感器；cst；阿基米德双螺旋天线；超高频 【Abstract】 With the power system to develop in the direction of high voltage large capacity, voltage grade of power transformer and the single capacity are also constantly improve, once accidents, will cause blackouts, and even endanger the stability of the power system operation, huge economic loss. Statistics show that insulation fault is one of the important reason for the transformer accidents, and partial discharge (partial discharge) is one of the important signs of insulation degradation failure. Bureau of on line monitoring can effectively reflect the status of transformer insulation, become a research hotspot in recent years. Based on discharge characteristics of power transformer, based on the CST electromagnetic simulation software was designed and developed a kind of uhf sensors, namely Archimedes helix antenna. The sensor of the effective frequency range is 500-1500 MHZ. It can be used to detect uhf partial discharge signals in effective frequency band, which lay a foundation for ultra high frequency power transformer partial discharge detection setting is very useful.  HYPERLINK app:ds:keywords keywords：Partial Discharge；Sensor；Cst；Archimedes Helix Antenna；High Frequency 目录 TOC \o 1-3 \h \z \u   HYPERLINK \l _Toc359268000 1 绪论  PAGEREF _Toc359268000 \h 1  HYPERLINK \l _Toc359268001 1.1 变压器局部放电的产生机理  PAGEREF _Toc359268001 \h 1  HYPERLINK \l _Toc359268002 1.2 产生局部放电的原因  PAGEREF _Toc359268002 \h 1  HYPERLINK \l _Toc359268003 1.3 局部放电的危害  PAGEREF _Toc359268003 \h 2  HYPERLINK \l _Toc359268004 1.4 局部放电在线监测的主要方法  PAGEREF _Toc359268004 \h 2  HYPERLINK \l _Toc35