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A novel simulation approach for measuring of DC voltage offset influence on magnetizing current even harmonics in the power transformer by using dither

机译：一种利用抖动测量直流电压偏移对电力变压器中励磁电流甚至谐波影响的新型仿真方法

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This paper presents stochastic method for measurement of DC voltage offset in 0.4kV distribution network influence on magnetizing current even harmonics presence in the power transformer. Variety of phenomenon, like geomagnetic field, asymmetry of different loads, photovoltaic converters in smart grid, etc. can produce small DC voltage offset in power transformer. Order of magnitude of this offset is around 1mV in 0.4kV distribution network. Such extremely low DC signal level detection (in presence of high AC amplitude) presents challenging measurement task. By using stochastic method, even the direct measurement of such small offset is possible. It is also possible to measure even harmonics of magnetizing current in power transformer in order to measure input voltage DC offset component indirectly, since even harmonics in magnetizing current are consequence of DC component in input voltage.
机译：本文提出了一种随机方法，用于测量0.4kV配电网中直流电压偏移对励磁电流，甚至变压器中是否存在谐波的影响。地磁场，不同负载的不对称性，智能电网中的光伏转换器等各种现象都可能在电力变压器中产生较小的直流电压偏移。在0.4kV配电网络中，该失调的数量级约为1mV。这种极低的直流信号电平检测（在高交流振幅的情况下）提出了具有挑战性的测量任务。通过使用随机方法，甚至可以直接测量如此小的偏移量。为了间接测量输入电压的直流偏移分量，还可以测量电源变压器中励磁电流的偶次谐波，因为励磁电流中的偶次谐波是输入电压中直流分量的结果。

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