Research on the Differential Protection Algorithm of Multi-Tap Special Transformer

Mingyu Huang^1*, Liang Dong², Jun Zhang¹, Jun Wang², Zhiguo Hao²

¹Ningxia Electric Power Research Institute, Ningxia, China.
²Xi’an Jiaotong University, Xi’an, China.

DOI: 10.4236/jpee.2014.29014                

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.

Keywords

Differential Protection, Special Transformers, Multi-Tap, Electrolytic Aluminum

Conflicts of Interest

The authors declare no conflicts of interest.

References

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