MT26 Abstracts, Timetable and Presentations

Wed-Mo-Po3.08-02 [54]: Modelling and experimental verification of dc inductive superconducting fault current limiter

25 Sept 2019, 09:30

1h 45m

Level 2 Posters 2

Poster Presentation Wed-Mo-Po3.08 - Current Limiters I

Speakers

Prof. Bin Li (Tianjin University,Key Laboratory of Smart Grid of Ministry of Education School of Electrical & Information Engineering)Mrs Wei Hong (Tianjin University,Key Laboratory of Smart Grid of Ministry of Education School of Electrical & Information Engineering)

Description

Due to its excellent current-limiting capacity, especially at the initial dc fault transient stage, the analyses of dc inductive superconducting fault current limiter (I-SFCL) are attracting more attention. In this paper, a modelling method for dc I-SFCL was proposed to describe its nonlinear characteristic of inductance. Firstly, the structure of dc I-SFCL was briefly introduced. Then the magnetic field distribution, including the leakage magnetic flied distribution, was considered by finite element method (FEM) to establish an equivalent magnetic circuit of the dc I-SFCL. By analyzing the equivalent magnetic circuit, the relationship between dc transient current and the inductance of dc I-SFCL was calculated. Accordingly, a mathematical I-SFCL model can be built in MATLAB to discuss the current-limiting performance. A dc I-SFCL prototype has been fabricated to verify the accuracy of the proposed modelling method and simulation result.

KEY WORDS: dc inductive SFCL, leakage magnetic field distribution, equivalent magnetic circuit, modelling method, dc SFCL prototype.

Presentation materials

Poster-Wang-MT26-qiV2.pdf