Title page for ETD etd-04142009-040436


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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