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Basic Research on Protection of Distribution Lines through the Waveform Analysis of Surges caused by Lightning Discharges

从雷击浪涌波形分析进行配电线路保护的基础研究

基本信息

批准号：
02805034
负责人：
SAKURANO Hitoshi
金额：
$ 1.34万
依托单位：
Ishikawa National College of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1992
项目状态：
已结题

项目摘要

Obtained results in this project are summarized as the following five items ;1. Observations of the electric field intensity on the ground by measuring the point discharge current have been performed at Ishikawa National College of Technology, and several sites around the College in winter. The frequency of occurrence of positive flash nearly the same as that of negative one in winter lightning discharges.2. A graphical method was developed to presume regional destribution of the electric field under the winter thundercloud on the basis of observed records. The accurated stroke locations were determined by the double-quarter VTR observations. These have struck positions within distance of about 1 km from the boundary between the positive and negative areas of the electric field on the ground.3. Lightning characteristics in the flat ground mentioned above were compared with one at Mt. Okushishiku and Mt. Houtatsu in Hokuriku district.4. Lightning surges induced on the three distribution feeders were measured by a memory recorder with 4 channel at the Unoke substation. A waveform of zero-phase-sequence currents induced on the line near the cloud-to ground flash point is different from one on the other lines.5. The capacitive voltage detector using an optical fiber system was produced as an experiment. The improvement in design will be achieved for recording a precise waveform in future.

本项目取得的成果概括为以下五项：1.在石川国立技术大学和大学周围的几个地点，在冬季通过测量点放电电流对地面电场强度进行了观测。在冬季闪电放电中，正闪和负闪出现的频率基本相同.本文提出了一种根据观测资料推测冬季雷暴云下电场区域分布的图解方法。准确的中风位置是由双四分之一VTR观察确定的。这些都击中了距离地面上电场的正负区域之间的边界约1公里的位置。并将上述平地的雷电特征与中山的雷电特征进行了比较。Okushishiku和Mt.北陆区的后津。在Unoke变电站，通过4通道记忆记录仪测量了三条配电馈线上感应的雷电浪涌。云地闪点附近线路上感应的零序电流波形与其他线路上感应的零序电流波形不同.作为实验，制作了使用光纤系统的电容式电压检测器。在设计上的改进将实现在未来记录一个精确的波形。