1、 110kV 变电站接地与防雷的设计 2012 年 5 月 110kV 变电站接地与防雷的设计 The Design of 110kV Substation Grounding and Lightning Protection I 摘 要 随着经济的快速发展,企业生产和家庭用电对电能质量的要求越来越高,同时 使用电能的安全性的要求也在进一步提高。雷电一直是危害电力系统安全稳定运行 的重要因素之一,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 行了研究,并提出了变电站防雷与接地措施。根据该变电站的基本情况,对该
2、变电 站的接地网防雷和保护进行设计,使该站的接地电压满足允许 0 值,跨步电压和接 地电压不超过允许值,其接地电阻、接触电压和跨步电压都满足要求,选择合适的 设备对雷入侵波引起的过电压进行保护,由变电站土建面积进行变电站电气总平面 的布置,根据避雷针设置规则、变电站构架跨度及保护站内所有电器设备的要求, 对站内进行避雷针设置构成防雷保护措施,使全站设备都处于防雷保护范围内。本 文通过计算短路电流,从结论中选择合适接地材料,设置接地网,达到防雷保护变 电站的全范围目的。 关键词:电力线路 110kV 变电站 防雷措施 接地网设计 II Abstract With the rapid econom
3、ic development, production and household electricity requirements of power quality are getting higher and higher use of electricity,at the same time the security requirements are further increased. Lightning has been one of the important factors that endanger safe and stable operation of power syste
4、ms, 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 stepv