Title :
Analytical calculation of damper winding losses in large hydrogenerators
Author :
Yun Lu ; Jianjun Liu ; Libing Zhou ; Huilin Kang
Author_Institution :
State Key Lab. of Adv. Electromagn. Eng. & Technol., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
The damper winding is one of the key components of hydro generators. At steady load conditions, currents are induced in the damper winding due to the harmonic field in the air-gap, which lead to parasitic losses in generators. This paper describes an analytical method for calculation of currents and power losses in the damper winding. The described method is based on harmonic analysis of the air-gap magnetic field and the equivalent circuit of the damper winding. The obtained analytical results are compared with values by 2-D transient finite element (FE) studies.
Keywords :
finite element analysis; harmonic analysis; hydroelectric generators; shock absorbers; 2D transient FE study; 2D transient finite element study; air-gap magnetic field; current loss; damper winding loss; equivalent circuit; harmonic analysis; harmonic field; hydrogenerators; parasitic loss; power loss; steady load condition; Air gaps; Harmonic analysis; Rotors; Shock absorbers; Stator windings; Windings;
Conference_Titel :
Electrical Machines and Systems (ICEMS), 2014 17th International Conference on
Conference_Location :
Hangzhou
DOI :
10.1109/ICEMS.2014.7013516
