摘要
雷电冲击电压是变压器经常遇到的幅值较高、陡度较大的暂态过电压。很多配电变压器在现有防雷保护措施下仍被雷击损坏,配电变压器在运行中除了长期经受工作电压的作用外,还会遭受暂态过电压的作用。暂态过电压作用时间虽然较短,但其幅值很高,而且在变压器绕组上分布不均匀,因而对变压器的主绝缘和纵绝缘都有严重威胁。针对配电变压器截波过电压进行了基于简易模型的仿真分析。
Lightning surge voltage is higher amplitude, gradient transient voltage which transformers often meet. Many distrubition transformers are still broken by lightning under lightning protection measures. The transformers can be subjected to transient voltage besides operational voltage for a long period. Though the applied time of the transient voltage is short ,the amplitude is high, and they are not uniformly distributed on the transformer windings, thus having serious threat. The simulation analysis for the transformer chopping overvoltage based on simple pattern is carried out.
出处
《电气开关》
2009年第5期45-47,50,共4页
Electric Switchgear
关键词
截波过电压
数学模型
暂态模型
简易模型
仿真分析
chopping overvoltage
mathematical model
transient pattern
simple pattern
simulation analysis
