Maximising rotor thermal capacity

Author

Lachs, W.R.

Author_Institution

Dept. of Electr. Power, New South Wales Univ., Sydney, NSW

Volume

1

fYear

2001

fDate

28 Jan-1 Feb 2001

Firstpage

205

Abstract

Not only is there no uniformity in the method adopted for generator rotor overcurrent protection, but the AVR control algorithms do not directly assess the rotor´s temperature. Often, after rotor overcurrent protection has functioned following a sharp increase of excitation current, 90% of the rotor´s thermal capacity is still unused. A computationally reliable and fast method has been devised for assessing rotor temperature and its rate of change by monitoring each unit´s rotor current and voltage. Important benefits can be gained in system operation by utilising this new method to replace existing rotor overcurrent protections

Keywords

electric current measurement; electric generators; machine protection; machine testing; monitoring; overcurrent protection; rotors; thermal analysis; voltage measurement; AVR control algorithms; current monitoring; excitation current; generator rotor overcurrent protection; rotor temperature assessment; rotor thermal capacity maximisation; voltage monitoring; Control systems; Power generation; Power system interconnection; Power system protection; Reactive power; Rotors; System testing; Temperature control; Thermal stability; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Society Winter Meeting, 2001. IEEE

Conference_Location

Columbus, OH

Print_ISBN

0-7803-6672-7

Type

conf

DOI

10.1109/PESW.2001.917035

Filename

917035