Title :
Calculation of transient electric field of converter transformer under polarity reversal voltage
Author :
Li, Lin ; Ji, Feng ; Liu, Gang ; Sun, Youliang
Author_Institution :
Sch. of Electr. & Electron. Eng., North China Electr. Power Univ., Baoding, China
Abstract :
A state space finite element method is presented for the calculation of transient electric field in oil-immersed insulation system of converter transformer. Firstly, the state equation is derived based on the quasi-static electric field theory, combined with the given boundary value using the penalty method, which has a clear physical meaning. Secondly, the state equation is solved in a fine integration method. The validation of method is verified by means of a model, in which the analytic solution of transient electric field can be gotten. At last, the transient electric field is calculated of a practical converter transformer under polarity reversal voltage.
Keywords :
electric fields; finite element analysis; power convertors; power transformers; transformer oil; transients; converter transformer; fine integration method; finite element method; oil-immersed insulation system; penalty method; polarity reversal voltage; quasi-static electric field theory; state equation; state space method; transient electric field; Dielectrics and electrical insulation; Differential equations; Finite element methods; Oil insulation; Power engineering and energy; Power transformer insulation; State-space methods; Sun; Transient analysis; Voltage;
Conference_Titel :
Electromagnetic Field Computation (CEFC), 2010 14th Biennial IEEE Conference on
Conference_Location :
Chicago, IL
Print_ISBN :
978-1-4244-7059-4
DOI :
10.1109/CEFC.2010.5481514
