摘要
为了解决传统变压器易被雷击坏的问题,本文分析了雷电波的频谱特性,并介绍一种新型防雷变压器的设计方案及其防雷机理。采取的措施是在变压器绕组上加装一种转换装置,即在铁心外增加一组或两组串接电容的附加绕组。建立变压器绕组时域等值电路的状态方程,通过MATLAB软件中Simulink的状态方程模块进行仿真,给出变压器在雷电波作用下的暂态过程。暂态仿真结果表明新型防雷变压器的附加绕组能够大幅度降低雷电波作用于空载配电变压器的正、反变换过电压。
In order to solve the damageable problem for traditional transformer which is accessible to cause by lightning intrusive waves, the frequency spectrum of some lightning waves is analyzed and the design principle of a New Type Lightning-proof Transformer is proposed in this paper. One or two series connection of the additional winding capacitance is added to the core. The state-space equation of time domain equivalent circuit is established. In the role of lighting waveform, transient process of transformer is simulated by the state-space block of MATLAB. The results of simulation prove that the attached windings of New Type Lightning-proof Transformer have satisfactory effects on restraining the positive and reverse transformation of over voltage.
出处
《电测与仪表》
北大核心
2009年第6期21-25,共5页
Electrical Measurement & Instrumentation
关键词
状态变量法
新型防雷变压器
频谱
暂态过电压
state-variable method, new type of lightning proof transformer, frequency spectrum, transient voltage
