Title :
On-line demagnetization method for an iron core CT
Author :
Zheng, T. ; Hu, E. ; Yang, H. ; Zhao, R. ; Kang, Y. ; Terzija, V.
Author_Institution :
Coll. of Electr. Eng., Zhejiang Univ., Hangzhou, China
Abstract :
This paper proposes a demagnetization method for iron core current transformers (CT). A dc voltage source is used to charge an inductor, and the discharging effect of the charged inductor is used to demagnetize the remanent flux of the iron core CT. To verify the performance of the proposed method, the different core characteristics, level of remanent flux, and possible errors in all elements and measured core characteristics are analyzed with EMTP-RV simulator.
Keywords :
current transformers; demagnetisation; remanence; transformer cores; EMTP-RV simulator; charged inductor; dc voltage source; discharging effect; iron core current transformers; on-line demagnetization; remanent flux; Current measurement; Current transformers; Demagnetization; Inductors; Iron; Measurement uncertainty; Transformer cores;
Conference_Titel :
Magnetics Conference (INTERMAG), 2015 IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4799-7321-7
DOI :
10.1109/INTMAG.2015.7157048
