【摘要】：在水電站變壓器的實(shí)際運(yùn)行過程中,變壓器在遭遇雷電沖擊的同時(shí)還承受著工頻運(yùn)行電壓。為了了解實(shí)際運(yùn)行中變壓器繞組的過電壓分布狀況,利用以電感為基本元件的Bergeron等值模型,對(duì)工頻電壓在不同相位下疊加標(biāo)準(zhǔn)雷電波進(jìn)行了分析計(jì)算。計(jì)算結(jié)果表明:工頻電壓在負(fù)峰值相位下疊加標(biāo)準(zhǔn)雷電波,其輸入波峰值電壓略低于純標(biāo)準(zhǔn)雷電波入侵,但變壓器的節(jié)點(diǎn)峰值電壓和餅間峰值電壓高于純標(biāo)準(zhǔn)雷電波入侵,正峰值相位下疊加時(shí)則正好相反。該計(jì)算結(jié)果與在SIMULINK環(huán)境下的仿真結(jié)果一致,證明了該方法的正確性。
[Abstract]:In the actual operation process of hydropower station transformer, the transformer not only suffers lightning shock, but also bears the power frequency operation voltage. In order to understand the overvoltage distribution of transformer windings in practical operation, the standard lightning waves superimposed by power frequency voltage in different phases are analyzed and calculated by using the Bergeron equivalent model with inductance as the basic element. The calculation results show that the peak voltage of the input wave is slightly lower than that of the pure standard lightning wave when the power frequency voltage is superimposed under the negative peak phase, but the peak voltage of the node and the peak voltage between the cakes of the transformer are higher than those of the pure standard lightning wave, but the opposite is true when the positive peak phase is superimposed. The calculated results are consistent with the simulation results in SIMULINK environment, which proves the correctness of the method.
【作者單位】： 太原理工大學(xué)電氣與動(dòng)力工程學(xué)院;
【分類號(hào)】：TV734

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