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

• 作者: Jun Wang Jun Zhang Liang Dong Mingyu Huang Zhiguo Hao
• 来源期刊: 电力能源(英文)
• 学科: 医学
• 关键词: DIFFERENTIAL PROTECTION SPECIAL TRANSFORMERS MULTI-TAP Electrolytic ALUMINUM
• 年，卷（期）: 2014,（9）
• 页码范围: 98-105
• 页数: 8页
• 分类号: R73

摘要

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.