Title :
Insulation breakdown of field winding in turbine-generator fed from static exciter
Author :
Nagy, I. ; Korondi, P. ; Suto, Z. ; Ruzsanyi, T. ; Moricz, J.
Author_Institution :
Comput. & Autom. Inst., Hungarian Acad. of Sci., Hungary
Abstract :
The paper is concerned with the additional voltage stress in the field winding of turbine-generator produced by a thyristor exciter. In few cases, the insulation of field winding was damaged within a short time (some months) after commissioning the static exciters, although previously these rotors were in service with a DC rotating exciter without any trouble for many years. The current paper describes the experimental results of the study searching for a possible reason for the failure.
Keywords :
electric breakdown; exciters; failure analysis; insulation testing; machine insulation; machine testing; reliability; rotors; thyristor applications; turbogenerators; commissioning; failure causes; insulation breakdown testing; rotors; static thyristor exciter; turbine-generator field winding; voltage stress; Breakdown voltage; Electric breakdown; Insulation; Power cables; Power system transients; Resistors; Rotors; Stress; Thyristors; Transmission lines;
Conference_Titel :
Electric Power Engineering, 1999. PowerTech Budapest 99. International Conference on
Conference_Location :
Budapest, Hungary
Print_ISBN :
0-7803-5836-8
DOI :
10.1109/PTC.1999.826672
