TITLE:
Research on the Differential Protection Algorithm of Multi-Tap Special Transformer
AUTHORS:
Mingyu Huang, Liang Dong, Jun Zhang, Jun Wang, Zhiguo Hao
KEYWORDS:
Differential Protection, Special Transformers, Multi-Tap, Electrolytic Aluminum
JOURNAL NAME:
Journal of Power and Energy Engineering,
Vol.2 No.9,
September
16,
2014
ABSTRACT: Compared with conventional transformers,
the rectiformer is special in connection mode, which is multi-tap and not
equipped with the differential protection. In this paper, the differential
protection algorithm for Multi-tap special transformer was derived. The regulating
methods for the rectiformer were studied first, and then the rectiformer model
of one electrolytic aluminium plant was built by PSCAD/EMTDC, characteristics
of the rectiformer bank were also analyzed. The algorithm was derived on the
basis of the per-unit system, and the processing methods of the regulating
transformer’s tap position information were proposed. Finally, a contrast of
differential protection algorithm between the multi-tap special transformer and
the conventional transformer was made.