期刊论文

Wang, Yuanyuan

英文

IEEE ACCESS

2169-3536

2020

8

88322-88332

10.1109/ACCESS.2020.2993692

This work was supported in part by the National Natural Science Foundation of China under Grant 51777014, in part by the Hunan Provincial Key Research and Development Program under Grant 2018GK2057, in part by the Educational Commission of Hunan Province of China under Grant 18A124, in part by the Changsha Science and Technology Project under Grant kq1901104, and in part by the Hunan Graduate Research and Innovation Project under Grant CX20190686 and Grant CX2018B556.

本校为第一且通讯机构

In order to achieve selective ground fault protection for bus-connected Powerformers and improve the reliability of the protection scheme, this paper presents a novel stator single-line-to-ground (SLG) fault protection scheme for bus-connected Powerformers based on S-transform (ST) and bagging ensemble learning algorithm. The scheme utilizes ST to decompose the zero-sequence current signals acquired from the Powerformer terminal to obtain the amplitude-time-frequency matrix. Then, fault features extraction is presented, and three features inclu...