运行中的水电站变压器绕组雷击过电压分析
发布时间：2019-08-15 19:45
【摘要】：在水电站变压器的实际运行过程中,变压器在遭遇雷电冲击的同时还承受着工频运行电压。为了了解实际运行中变压器绕组的过电压分布状况,利用以电感为基本元件的Bergeron等值模型,对工频电压在不同相位下叠加标准雷电波进行了分析计算。计算结果表明:工频电压在负峰值相位下叠加标准雷电波,其输入波峰值电压略低于纯标准雷电波入侵,但变压器的节点峰值电压和饼间峰值电压高于纯标准雷电波入侵,正峰值相位下叠加时则正好相反。该计算结果与在SIMULINK环境下的仿真结果一致,证明了该方法的正确性。
[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.
【作者单位】： 太原理工大学电气与动力工程学院;
【分类号】：TV734
本文编号：2527187
[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.
【作者单位】： 太原理工大学电气与动力工程学院;
【分类号】：TV734
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，本文编号：2527187
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