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首页> 外文期刊>IEEE Transactions on Dielectrics and Electrical Insulation >Development of a new type of large-size self-integrating Rogowski coils applied in TPG-series generators
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Development of a new type of large-size self-integrating Rogowski coils applied in TPG-series generators

机译：TPG系列发电机中使用的新型大型自积分Rogowski线圈的开发

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Different meter-class, thousand-turn, self-integrating Rogowski coils for the TPG-series generators are designed. The features of this type of coils are the extremely large turn number (several thousands) and the 50-Ω characteristic impedance of the cable used as the current viewing resistor. After calibrations for these large-size coils, it is found that the experimental sensitivities are larger than the theoretical ones and that the deviations range from 4% to 20%, which cannot be accepted. The deviations are analysed in perspective of coil size and cable length. It is concluded that the sensitivity deviations are mainly due to the increased coil size and partly due to the long cables. A modified theoretical sensitivity expression of the large-size, self-integrating Rogowski coils is presented based on the transmission-line model, which embodies the factors of coil size and cable length. A method to test the key parameter in the model, the characteristic impedance of the coil, Z, is also presented. With this expression and the method, the theoretical sensitivities for the TPG-series generators are re-calculated, which agree well with the experimental ones, only with a deviation around 2%. It is suggested that the modified theoretical sensitivity expression can be used to calculate the sensitivity of the self-integrating Rogowski Coils with a large size.
机译：设计了用于TPG系列发电机的不同米级，千匝自积分Rogowski线圈。这种类型的线圈的特点是极高的匝数（数千个）和用作电流观察电阻器的电缆的50Ω特性阻抗。在对这些大型线圈进行校准之后，发现实验灵敏度要比理论灵敏度大，并且偏差范围为4％至20％，无法接受。从线圈尺寸和电缆长度的角度分析偏差。可以得出结论，灵敏度偏差主要是由于线圈尺寸增加，部分是由于电缆较长。在传输线模型的基础上，提出了一种修正的大尺寸自集成Rogowski线圈理论灵敏度表达式，体现了线圈尺寸和电缆长度的因素。还提出了一种测试模型中关键参数的方法，即线圈的特性阻抗Z。使用该表达式和方法，重新计算了TPG系列发生器的理论灵敏度，与实验值很好地吻合，仅相差2％左右。建议修改后的理论灵敏度表达式可用于计算大尺寸自积分Rogowski线圈的灵敏度。

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