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星形联接的自耦变压器(图1)类似于普通按星-星联接的变压器,因此它也需要连接成三角形的第三线卷。第三线卷的作用,在于使包含在激磁电流中的、补偿相电压中三次谐波分量的三次谐波电流能够
The star-connected autotransformer (Figure 1) is similar to an ordinary star-star transformer, so it also needs a third coil connected in a triangle. The role of the third coil is to enable the third harmonic current included in the exciting current to compensate the third harmonic component in the phase voltage