Title :
A simulating research on monitoring of winding deformation of power transformer by on-line measurement of short-circuit reactance
Author :
Xu, D.K. ; Li, Y.M.
Author_Institution :
Dept. of High Voltage & Insulation, Xi´´an Jiaotong Univ., China
Abstract :
A novel strategy for monitoring the state of power transformer windings by the online measurement of short-circuit reactance is studied on a model transformer under laboratory conditions. The results and their comparisons with those obtained in out-of-service condition show that the online method is able to detect short-circuit reactance variations with a high degree of accuracy, precision and good stability, and therefore can be used for diagnosis of deformation in the transformer windings. The changes of the operation condition of transformer and the external factors, such as the field interference, do not exert an effective influence on the results
Keywords :
deformation; electric reactance measurement; power transformer testing; short-circuit currents; transformer windings; monitoring strategy; online measurement; out-of-service condition; power transformer winding deformation monitoring; short-circuit reactance measurement; Deformable models; Equivalent circuits; Impedance; Magnetic flux; Monitoring; Phase transformers; Power measurement; Power transformer insulation; Power transformers; Windings;
Conference_Titel :
Power System Technology, 1998. Proceedings. POWERCON '98. 1998 International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-4754-4
DOI :
10.1109/ICPST.1998.728946