Microprocessor based protection of alternator against stator insulation failure

Author

Das, Krishanu ; Ghosh, Debashis ; Dasgupta, Dipankar

Author_Institution

Dept. of Electr. Eng., Bengal Eng. Coll., Howrah, India

fYear

1995

fDate

5-7Jan 1995

Firstpage

139

Lastpage

142

Abstract

A microprocessor based scheme for protection of stator winding of a large alternator has been devised for interturn, intraturn and turn to ground insulation failures. The proposed scheme protects the entire stator winding leaving no unprotected zone. The software used here is simpler in logic, but quicker in operation, without compromising reliability in any way. Complex subroutines are avoided for all arithmetic operations. Hence the execution time in each cycle is minimised. The total acquisition time of the supervisory loop, that ensures complete protection of all the three phases, comes not more than 30 milli-seconds

Keywords

alternators; machine insulation; machine protection; microcomputer applications; stators; alternator protection; interturn insulation; intraturn insulation; microprocessor based protection; stator insulation failure; stator winding; supervisory loop; Alternators; Frequency; Insulation; Logic; Microprocessors; Power generation; Protection; Protective relaying; Stator cores; Stator windings;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Automation and Control, 1995 (I A & C'95), IEEE/IAS International Conference on (Cat. No.95TH8005)

Conference_Location

Hyderabad

Print_ISBN

0-7803-2081-6

Type

conf

DOI

10.1109/IACC.1995.465854

Filename

465854