抑制变压器截波过电压的仿真分析

Simulated Analysis of the Controlling Chopping Overvoltage of the Transformer

随着我国经济的发展,用电量迅速增长,同时,配电网络不断延伸,配电变压器不断增多,而保证配电变压器的正常运行是十分重要的。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。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,因此对配电变压器截波过电压进行深入的研究和分析已成为一件非常紧迫的事情。

Along with the distributing network extension,the distributing transformerts are continuously increased.Normal operation for the distributing transformer is very important.The distributing transformer not only undergoes the working voltage in operation,but transient overvoltage effect.The transient overvoltage is short,but its amplitude is high,the winding distribution on the transformer is nonuniform,so it has serious meance to the major insulation and minor isulation of the transformer.Lighting surge voltage is higher amplitude and steep transient overvoltage that the transformer of ten meet.A lot of transformers are still danaged by lighting under lighting protection measures,thus study and analysis in depth for the chopping overvoltage of the transformer has been become something very important.