Torsional and Electrical Dynamic Interactions of Compressor Drive Motors and Gas Turbine Driven Power Generators

Abstract

Load induced power fluctuations in a pair of synchronous motor driven reciprocating compressor trains have been shown to interact with a gas turbine driven power generation source. Electrical current pulsations predicted at the generator terminals were evaluated to determine the response of both mechanical torsional systems and the potential for micropitting of the generator drive gear teeth. The compressor and generator torsional mechanical systems were modeled along with an electrical model of the interconnecting power system in a time domain analysis of the dynamic interactions.