A system and a method for automatically drawing a graph by a main transformer equipment on-load measurement vector

The invention discloses a system and a method for automatically drawing a graph by a main transformer equipment on-load measurement vector. The system comprises a data input unit, a graph drawing unitand a result analysis unit, the graph drawing unit is configured to automatically extract data input by the data input unit; the current and voltage data is subjected to conversion from a secondary value to a primary value, middle-voltage-side current and low-voltage-side current are converted to a high-voltage side, a vector diagram is automatically drawn based on the converted current and voltage amplitude and phase, and the analyzed data are sent to a result analysis unit for result display. The method has the beneficial effects that a mode of combining data actual measurement and background calculation is adopted, the vector drawing speed and accuracy can be greatly improved, manpower and material resources are saved, and the method has very high popularization value in practical application. 本发明公开了一种主变设备带负荷测