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《Electrical Measurement & Instrumentation》 2009-06
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Analysis of Transient Voltage in New Type of Lightning Proof Transformer Based on State-Variable Method

WANG Ju-feng,LU Jun-jie,CHEN Zhou-ping (Electric Engineering College,Guangxi University,Nanning 530004,China)  
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.
【CateGory Index】: TM862
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