壳式变压器并联线圈电流分配及阻抗电压计算

Calculation of Ampere-turn Distribution and Impedance in Shell-Type Transformers

本文基于有限元技术，提出计算壳式铁心变压器并联线圈中电流分配的最小能量法和电压平衡法，并证明了两种方法的等价性。应用这两种方法还获得漏磁场分布和阻抗电压。应用于一台３６０ＭＶＡ，５２５／１８ｋＶ的壳式铁心变压器，计算出了最小、额定和最大分接情况下并联线圈中的电流分配和阻抗电压，并与实验值做了比较。

Based on the finite element method,the minium energy principle and the voltage equilibrium principle have been developed to calculate the ampere-turn distribution of parallel coils in a shell-type transformers. It has been also proved that the above two principle are equivalent. For a large shell-type Power transformer,the ampere-turn distributions under the maxium,rated and minimum taps have been obtained by using the above principles,at same time,the leakage magnetic fields and the impedances of the transformer for correspeding taps are also solved respectively. All results are examined by the experiment.