Quzhou Grid Inrush Current, And Inrush Current Characteristics And Its Impact On The Longitudinal Differential Protection

Differential protection has been a major protection of transformer in a long time.For a long time, as a transformer differential protection has been one of the main protection of transformer, which has long been the basic principles of the formation and more mature, and the protection of the most important and most difficult problem is how to prevent the inrush current differential protection caused by the malfunction. In response to this problem, researchers relay a lot of criteria to identify the inrush current.In this paper, summed up the basic principles of transformer differential protection, and inrush current and the current mechanism and Protection of the impact of a single transformer at no-load closing, the two transformer in series and two parallel main transformer etc. the transformer of Quzhou area inrush current and should be carried out and measured, and measured by the three-phase current and zero sequence current data to conduct a comprehensive analysis on how to effectively prevent the differential transformer malfunction protection and enhance the protection of transformer action The correct rate of the corresponding measures for improvement.