STATIC - EXCITER S

Abstract

The static exciter extracts a portion of the voltage and current output of the a. c. generator to be excited, and utilizes this power to supply controlled excitation back into the field of the generator. In the present text, it is intended to make a review of the existing literature on the static exciters and thereafter to design and set up a static excitation system for an alternator in the Electrical Engineering Department of the University of Roorkee and then to obtain its steady state and transient performance. The concept of static excitation system for a. c. generators is relatively new. In 1961 a static excitation syst-em was developed utilizing a. c. machine terminals through current and potential transformers, to provide excitation power. The first applications of this system were confined to small generators rated upto approximately 15 KVA at 420 cycles. •Since then, similar systems have been extensively-applied to generators on commercial and military air-craft, as well as to many 60 cycles generators with ratings upto approximately 100 KVA. In addition, this system has been applied to generators rated upto 2,500 KVA, at 60 cycles for marine service. All these applications have been to generators with armature