Type of Document Master's Thesis Author Lu, Yujie Irene URN etd-04142009-040436 Title Real-time digital simulation of the generator model Degree Master of Science Department Electrical Engineering Advisory Committee
Advisor Name Title Phadke, Arun G. Committee Chair De La Ree Lopez, Jaime Committee Member Mili, Lamine M. Committee Member Keywords
- Electric generators
Date of Defense 1990-09-05 Availability restricted Abstract
This thesis is in an attempt to realistically model a real-time digital generator which interfaces to an analog system simulator and which consists of the synchronous machine and its peripheral controllers such as the exciter and the governor-turbine subsystems. In this work, the exciter, the synchronous machine, the machine dynamics and the governor are modeled in detail while a simplified model of the turbine is used.
The synchronous machine, the main component of this simulation, solves the discretized Park's machine equations which include flux derivative tenns and tenns pertaining to the two amortisseur windings. Treatment of saturation effects in the mutual inductances is also discussed. The Park's model is arranged to obtain a field voltage and machine armature cutTent input - machine tenninal voltage output structure, where the armature current and terminal voltage are rotor based quantities (i.e. in d-q domain). In order to interface the Park's machine model to the analog system model, the Park's and inverse Park's transfonnation are implemented by software modules.
The implementation of a prototype model generator using a Motorola 68020 microprocessor and fast computer peripherals is discussed. The results of the digital computer simulation in real-time for the generator model under various operating conditions are presented.
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