Developments in Large Turbo-Type Generators

The construction of the modern large turbogenerator has been made possible by developments in the manufacture of large forgings, techniques of construction, and design progress maintained by continued reappraisal of known and careful analysis of new problems. The present paper reviews the progress which leads to construction of the direct liquid-cooled generator and discusses a number of major problems which have become prominent with the increase in maximum output. These include negative sequence heating, asynchronous operation, current collection, and short-circuit torques.