METHOD AND DEVICE FOR CALCULATING WINDING CURRENTS AT DELTA SIDE FOR TRANSFORMER

The invention relates to a method and device for calculating winding currents at delta side for a transformer. The transformer has two or more windings, with a first winding being a delta connected winding. The method comprises obtaining line currents measured with measurement equipment associated with lines connected with the windings. The method further comprises calculating zero sequence currents for at least a second winding, from the line currents of a corresponding line. The method further comprises calculating zero sequence currents for the first winding, based on the zero sequence currents for at least the second winding, a phase displacement between the windings, and a turns ratio associated with the windings. The winding currents are calculated from the zero sequence currents ofthe first winding, and the line currents of a corresponding line. The winding currents values are rendered for one or more operations associated with the transformer. 本发明涉及用于计算在变换器的三角形侧的绕组电流的方法和装置。变换器具有两个或更多绕组，其中第一绕组是三角形连接的绕组