HOU Wei, SHAO Lingmin, DUAN Shengpeng, et al. Research and application of differential protection for multi-branch phase-shifting transformer[J]. 2018, 38(10): 205-209.
HOU Wei, SHAO Lingmin, DUAN Shengpeng, et al. Research and application of differential protection for multi-branch phase-shifting transformer[J]. 2018, 38(10): 205-209. DOI: 10.16081/j.issn.1006-6047.2018.10.032.
The shortages of traditional protection for phase-shifting transformer are analyzed
the working principle of phase-shifting transformer is studied in detail
the current conversion relationship suitable for different types of phaseshifting transformer is deduced
and a new digital differential protection scheme using full-angle phase-shifting and digital sampling technology is proposed. The proposed scheme solves the problem that differential protection cannot be equipped in traditional multi-branch phase-shifting transformers
greatly improves the performance of protection system
and is suitable for different types of phase-shifting transformers. The effectiveness and correctness of the proposed scheme are verified by the simulation carried out with RTDS. The differential protection device applying the proposed scheme has been put into operation in March 2017