Dy和Yd类变压器联结组的微机判别

三相变压器的联结组标号必须判别确定。选较复杂的 Dy和 Yd类联结组为例 ,对其进行理论分析 ,获得作筛选法判别基准的理想计算值的规律性。在实测时考虑三相电源电压不对称的影响 ,用实测计算值代替理想计算值作判别基准。经微机的硬件与软件系统联试 ,能对全部联结组标号快捷地判别 ,不仅能判定对与错 ,还能指出错误联成何种标号

THE VERIFICATION OF Dy AND Yd TYPE TRANSFORMER CONNECTION WITH COMPUTER

Connection symbols of a three phase transformer must be verified. A more complex Dy and Yd type connection is taken for example. Through theoretical analysis, the regularity of ideal calculated values which serves as the verifiable basis of the screening method is obtained. In actual measurement, the influence of asymmetry of the power's three phase voltage should be considered, and calculated values by measuring should be used instead of the ideal ones for verifiable basis. Measured jointly by the hardware and software of a computer, all connection symbols can be verified rapidly. Besides verifying its correctness, it can also be pointed out that which kind of symbol was connected by mistake.