摘要
从实际运行经验来看,雷击是电力系统安全可靠性的主要危害之一,而且雷击事故占到了电力系统事故的50%以上。文中以500kV变电站为例,采用国际通用的电磁暂态计算程序EMTP,结合常规的变电站设计经验,将变电站及其进线段作为统一网络考虑,对变电站可能的运行方式建立雷电冲击仿真模型,分析雷电侵入波的电压幅值、陡度;结合各电气设备的绝缘裕度和雷电过电压的影响因素,提出了适合该变电站的经济可靠的防雷方案。
From actual operating experience of various countries, lightning is the major hazards of the power system security and reliability, and lightning accidents account for around 50% of the power system accident. In this article, it takes 500 kV sub- station as an example, using the international common electromagnetic transient calculation program EMTP, combined with regular experience in substation design, taking substation and its segments as a unified network to consider, establishes simulation model of lightning impulse for the substation may running modes, analyzes of invasion wave voltage amplitude, steepness, combined with the insulation margin of all electrical equipment, explores the influencing factors of the lightning over-vokage, and then put forward an economic and reliable lightning protection program for the substation.
出处
《通信电源技术》
2013年第6期8-10,共3页
Telecom Power Technology
关键词
变电站
雷电过电压
EMTP
绝缘裕度
substation
lightning over-voltage
the EMTP
insulation margin
