Title :
Optimal design of generator circuit breakers up to a capacity of 2000 MVA using thermal models
Author :
Schoenemann, Thomas ; Pleines, Marianne ; Schenk, Mario ; Löbl, Helmut ; Magier, Tomasz
Author_Institution :
ABB Switzerland AG, Zurich, Switzerland
Abstract :
Generator circuit breakers must be able to carry operating currents of several 10 kA and short time currents of several 100 kA. It is shown how a generator circuit breaker to be developed can be optimized by calculation using the thermal network method and finite element models for high operating currents. The essential parameters are found out which mainly determine the temperatures of the conductor path and the contact systems. The parameters, which are needed for the calculation of the thermal network models and the optimization of the circuit breakers, were determined experimentally or by calculation (FEM).
Keywords :
circuit breakers; contact resistance; electric generators; electrical contacts; finite element analysis; optimisation; 10 kA; 100 kA; 2000 MVA; FEM; conductor path; contact resistance; contact systems; finite element models; generator circuit breakers; operating currents; optimal design; optimization; short time currents; thermal network method; thermal network models; Circuit breakers; Conducting materials; Cooling; Heat transfer; Laboratories; Power generation; Temperature; Thermal engineering; Thermal resistance; Voltage;
Conference_Titel :
Electrical Contacts, 2004. Proceedings of the 50th IEEE Holm Conference on Electrical Contacts and the 22nd International Conference on Electrical Contacts
Print_ISBN :
0-7803-8460-1
DOI :
10.1109/HOLM.2004.1353103
