LIU Dong-qi. Analysis of Fault Due to Different Grades of Tap-changers for Distribution Transformers in Parallel Operation[J]. High voltageapparatus, 2009, 45(2): 124-125+129.
LIU Dong-qi. Analysis of Fault Due to Different Grades of Tap-changers for Distribution Transformers in Parallel Operation[J]. High voltageapparatus, 2009, 45(2): 124-125+129.DOI:
To guarantee parallel distribution transformers working safely and prevent tap-changers from different grades
theoretical calculation of the circulation current and the abnormal current due to different grades of tap-changers is conducted
and fault analysis is performed.The results show that different grades of tap-changers in parallel distribution transformers lead to circulation current in transformers coils to unbalance the load allocation
or even burn the transformers.Some measures to avoid the different grades are suggested.