干式空芯电抗器线圈径向厚度对自感几何系数及支路电流分布影响研究

Influence of Coil Radial Thickness of Dry-type Air-core Reactor on Self-inductance Geometric Coefficient and Branch Current Distribution

深入开展35 kV干式空芯电抗器线圈径向厚度对自感几何系数及支路电流分布的影响研究,对提高35 kV干式空芯电抗器设计水平、工艺控制和电抗器的安全、可靠运行,具有重要意义。为此,文中通过有限元方法,研究了35 kV干式空芯电抗器线圈径向厚度对自感几何系数及支路电流分布的影响,研究结果表明:线圈径向厚度通过影响线圈的自感几何系数进而影响电抗器支路电流的分布、电抗器的总损耗,线圈径向厚度偏差加剧了包封温升。当第一支路匝数偏差1.5%时,可使支路二电流增大139.4%,总的功率损耗增大21.4%。

To improve the design level,process control and to provide safe and reliable operation of 35 kV dry-type air-core reactor,the research on the influence of the coil radial thickness of 35 kV dry-type air-core reactor on the self-inductance geometric coefficient and branch current distribution is of great significance.Therefore,the influence of coil radial thickness of 35 kV dry-type air-core reactor on the self-inductance geometric coefficient and branch current distribution is studied via the finite element method.The results show that by affecting the self-inductance geometry coefficient of the coil,the coil radial thickness affects the distribution of branch current,the total loss and the temperature rise of the reactor.When the turn deviation of the first branch reaches 1.5%,the current in the second branch increases by 139.4%,and the total power loss increases by 21.4%.