摘要
雷电是自然界中普遍的现象,它是由于雷雨云中电荷放电而产生的复杂的自然现象,也是一种会造成严重灾难的自然现象。根据气候、卫星及闪电定位仪观资料估计表明,在任一秒,全球表面上连续发展着大约100个雷电。雷电放电过程同时出现三种物理现象:静电感应、电磁感应和辐射感应。对不同的场合会有不同程度的危害,仅依靠传统避雷针等直击雷防护系统已无法进行有效保护。在危险系数较高的油罐区,防雷的问题更加突出,它需要保护的不仅仅是油罐本体的安全,还有油罐区脆弱的仪表系统。现在对雷电的防护方法一般有三种:一、泄,即通过不同的防雷方式将绝大部分雷电流接闪后直接引入地下;二、限,即通过避雷器等设备控制被保护物体上的浪涌电压幅值;三、隔,即将电源线或数据、信号线和可能引入的过电压波通过屏蔽等方法隔离开来。在油罐区系统中这三种方法必须同时使用,且要相互配合,各行其责。
The thunder is a catastrophic phenomenon, but generally in the nature. It is due to discharge of thundercloud. According to the values in climatology and secondary planet observing, these are one hundred in every second. Three methods are normally used in thunder safeguard. First, release. Lead the lightning current flow through to ground. Second, restrict the surge overvoltage value. All of above should used in together, seldom separately. Third, insulate. Put the power supply and data or signal wire to shield. These are an economic and effective lightning proof method proposed in this paper. It used a combination of the lightning rod and wire to preventing the oilcan from lightning strike. Finally considering the central control system, all instruments are connect to ground.
出处
《电气技术》
2011年第11期67-69,83,共4页
Electrical Engineering
关键词
油罐区
避雷针线结合
浪涌保护器
综合防雷技术
oilcan
lightning rod and wire. SPD. synthetical lightning protection technology
