Dissertation > Excellent graduate degree dissertation topics show

Calculation of No-Load EMF Waveform and Optimization of Damper Windings for Powerformer

Author: GuanXing
Tutor: GeBaoJun
School: Harbin University of Science and Technology
Course: Motor and electrical
Keywords: Energy converter No - load potential Time Stepping Finite Element Field-circuit coupling
CLC: TM46
Type: Master's thesis
Year: 2005
Downloads: 61
Quote: 0
Read: Download Dissertation

Abstract

This paper introduces a new generation device - energy converter (Powerformer), can be directly connected to the grid . It breaks the traditional model of the plant in a century , conventional power plants , generators, surge voltage protection , generator side switch, bus , and a step-up transformer is omitted , replaced by one energy converter . Energy converter has the advantages of low cost , high efficiency , low maintenance costs , which will make it will have broad prospects for development in the future . Load voltage waveform is a key issue in the study of traditional generators , energy converter , in order to carry out the assessment of the quality of its power generation , but also must study its load voltage waveform . The load voltage calculation experienced analytical method to changes in numerical methods commonly used method is to directly solve the two - dimensional transient eddy field , but this method is difficult to consider the impact because the damper bar end connection in the form of the current constraints and ends of the magnetic flux leakage . Field-circuit coupling method to take into account the various effects of the above , to accurately calculate the load voltage waveform . This paper first describes the energy converter design principle , features and application prospects , and then establish a damper windings specific connection form mathematical model or to create a physical model , based on the actual structure of the prototype , calculated considering the end of the specific constraints in the form of empty set electric potential waveform, and with the case of excluding end restraint compared tooth harmonic component change . Experiments to verify the feasibility of this approach . The harmonic analysis of the prototype load voltage waveform , the tooth harmonic potential component , causing the load voltage waveform distortion rate waveform poor . Measures to improve the load voltage waveform , the damper winding structure of the the tooth harmonic component size EMF . By changing the structure of the damper winding calculation of the load voltage waveform of a number of situations , the impact of the law to analyze the the damper winding structure of the tooth harmonic component of the load voltage waveform achieved by adjusting the damper winding structure to improve the potential waveform purposes. Conducted load voltage waveform calculation and optimization of the damper winding structure , there are certain practical value , available engineering calculations use and reference .

Related Dissertations

CLC: > Industrial Technology > Electrotechnical > Transformers, converters and reactors > Converter
© 2012 www.DissertationTopic.Net Mobile