Title :
A new axial magnetic field contact for 126kV single break vacuum interrupters
Author :
Zhang, Yingyao ; Liu, Zhiyuan ; Geng, Yingsan ; Jianjun Yao
Author_Institution :
State Key Lab. of Electr. Insulation & Power Equip., Xi´´an Jiaotong Univ., Xi´´an
Abstract :
We proposed a new kind of coil type axial magnetic field (AMF) contact for 126 kV single break vacuum interrupters (VIs). The objective of this paper is to analyze and optimize AMF characteristics of the new contact. Compared with a former coil type AMF contact with 2 segments we developed, the new AMF contact is advantage with stronger AMF and lower electrode resistance. Its AMF characteristics were analyzed by finite element method (FEM) and we optimized AMF characteristics of the new contact by quadratic orthogonal regressive analysis. The optimization design results show that 1) the maximum axial magnetic flux density is 8.84 m T/kA on intermediate plane of contact gap 30 mm at current peak; 2) the maximum axial magnetic flux density is 1.18 m T/kA on intermediate plane of contact gap 30 mm at current zero; 3) the minimum electrode resistance is 7.8 muOmega.
Keywords :
coils; electrical contacts; finite element analysis; regression analysis; vacuum interrupters; axial magnetic field contact; coil type; finite element method; maximum axial magnetic flux density; minimum electrode resistance; quadratic orthogonal regressive analysis; single break vacuum interrupters; voltage 126 kV; Coils; Contact resistance; Design optimization; Electrodes; Finite element methods; Interrupters; Magnetic analysis; Magnetic fields; Magnetic flux density; Optimization methods;
Conference_Titel :
Discharges and Electrical Insulation in Vacuum, 2008. ISDEIV 2008. 23rd International Symposium on
Conference_Location :
Bucharest
Print_ISBN :
978-973-755-382-9
Electronic_ISBN :
1093-2941
DOI :
10.1109/DEIV.2008.4676774
