摘要
利用金沙大气本底站2006年7月至2007年12月雷电观测资料及2006—2007年闪电定位资料、咸宁市1960—2004年的雷电观测资料,通过实地考查、气象资料论证和分析,对金沙站雷电特性、雷电活动规律和雷击风险情况进行了分析。结果表明:金沙大气本底站雷暴日数接近于咸宁市,雷电流强度最大幅值和雷击密度都高于周边地区,建筑物、电气线路和活动人员处于易落雷区,发生直接雷击的风险较大。运用防雷的理论技术结合相关技术规范的要求,提出了金沙站的防雷应从直击雷保护、电涌保护、地网设置、等电位措施、屏蔽措施、综合布线等方面综合考虑,要遵循有关规范并适当提高标准进行防护,建筑物应按二类防雷标准进行设计,站区内的建筑物、设备、线路及活动人员均应处于LPZ0B区,电子信息系统防雷等级确定为A级,SPD设计不少于3级,第一级SPD的通流量50～80kA(10/350μS波形)为宜。
Based on the general thunder observations from July 2006 to December 2007 and the lightning location data during 2006-2007 in Jinsha Atmospheric Background Station, and the thunder data from 1960 to 2004 in Xianning, the features of the thunder, movement regularity of the thunder and lightning stroke risk are analyzed. The results show that, in Jinsha, the number of the thunderstorm day is close to those in Xianning, the density of lightning stroke and the maximum electric current are higher than those in surrounding areas. The risk of direct lightning stroke is greater in Jinsha. According to the lightning-prevention theory, technology and the technological specification, several aspects should be taken into account for lightning-prevention in Jinsha Region Atmospheric Background Station, such as direct lightning-prevention, surge protection, earthing network setting, equipotential .measure, shielding measure, comprehensive wiring, and etc. It should follow relative norms and properly raise the standards for Lightning-Prevention. Buildings should be designed according to the second level of standards of Lightning-Prevention. The buildings, devices, wirings and persons in the station area must be all in the LPZOB region. The lightning-prevention level of electron information system is ascertained the level A. SPD should be designed not less than three levels, and the flow of the first level of SPD should be at 50 to 80 kA.
出处
《暴雨灾害》
2009年第2期186-191,共6页
Torrential Rain and Disasters
基金
咸宁市气象局科技发展基金项目"金沙大气本底站雷电防护方法研究"资助
关键词
金沙
雷电特征
雷电防护
Jinsha station
Feature of thunder
Lightning-prevention
