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

fYear

2014

fDate

22-25 Oct. 2014

Firstpage

373

Lastpage

377

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems (ICEMS), 2014 17th International Conference on

Conference_Location

Hangzhou

Type

conf

DOI

10.1109/ICEMS.2014.7013516

Filename

7013516