110kV变电站接地与防雷的设计要点.doc

110kV变电站接地与防雷的设计 院 系：信息工程学院 专 业 班： 姓 名： 学 号： 指导教师： 2013年5月 110kV变电站接地与防雷的设计 The Design of 110kV Substation Grounding and Lightning Protection 摘 要 众所周知，雷电具有极大的破坏性，其电压高达数百万伏，瞬间电流可高达数十万安培。雷击所造成的破坏性后果体现于下列三种层次：①设备损坏，人员伤亡；②设备或元器件寿命降低；③传输或储存的信号、数据（模拟或数字）受到干扰或丢失，甚至使电子设备产生误动作而暂时瘫痪或整个系统停顿。如果变电站发生雷击事故将造成大面积停电给社会生产和人民生活带来不便这就要求防雷措施必须十分可靠。文章对变电站防雷保护系统进行了并提出了变电站防雷措施 关键词：电力线路 110kV变电站 防雷措施 接地网设计 Abstract It is well known that lettuce-eaters highly destructive, the voltage up to hundreds of millions of volts, current can be as high as hundreds of thousands of amperes. Lightning strike caused by the damaging consequences of embodied in the following three levels ：（1） Equipment damage, casualties; (2) equipment or components reduced life spans; （3）data transmission or storage of signal (analog or digital) interference or lost, or even make electronic equipment misoperation and temporary paralysis or the entire system to a halt. Substation is one of the most important component part of the whole power supply system, if the substation lightning accident occurs, it will cause blackouts and inconvenience to the social production and peoples lives, which requires lightning protection measures have to be very reliable. According to the substation, lightning protection and protection of the substation grounding grid design, the station and the ground voltage to meet the allowable value, the step voltage and ground voltage does not exceed the allowable value, the grounding resistance, touch voltage and stepvoltage requirements are met, select the appropriate equipment of lightning invasion wave overvoltage protection master plan layout of the electrical substation by substation civil area, set the rules according to the lightning rod, the requirements of the substation architecture span and protection stations all electrical equipment,station lightning rod to set the form of lightning protection measures, so that the whole station equipment in the lightning protection with