Dissertation > Excellent graduate degree dissertation topics show

The Main Circuit and Control Strategy of Excitation System Based on Full-Controlled-Devices

Author: YangJiaWei
Tutor: LuJiMing；MaoChengXiong
School: Huazhong University of Science and Technology
Course: Proceedings of the
Keywords: The controller parts excitation system Low-frequency oscillation Phase compensation method Linear optimal control strategy Voltage source inverter
CLC: TM761.11
Type: Master's thesis
Year: 2010
Downloads: 49
Quote: 0
Read: Download Dissertation

Abstract

Put into operation with the Three Gorges Project and UHV has spanned grid interconnection , coupled with the large generators generally fast excitation system , decreasing throughout the interconnected power system damping , the dynamic stability of the power system more problems and more significantly , its outstanding performance for a wide range of inter-regional low frequency oscillation . In addition , the long-distance transmission is another major feature of China 's power grid , there is not yet a very effective way to be able to solve the problem of the stability of the giant long-distance transmission unit . In a lot of measures to enhance the power system stability , excitation control is widely considered one of the most effective and economical means . Device with excitation system for high power electronic technology developed to analyze the structure of the main circuit and control strategy , the establishment of a mathematical model of the single machine infinite bus system excitation control system , the whole device with damping torque test excitation system to enhance the ability of the power system damping controller design method , and simulation , provides a new solution for suppressing low-frequency oscillation of power system and to improve the long-distance transmission capacity . Select the device with the excitation system based on voltage source inverter as the object of study , the operating characteristics of its main circuit and control strategy . Philips-Heffron model , based on the equivalent model of the device with the excitation system , the establishment of the single machine infinite bus system equipped with the controller parts excitation system deduced device with excitation system reactive power injected into the damping torque to the power system mathematical expressions , to verify the ability of the device with excitation system to improve power system damping characteristics . Application phase compensation method and linear optimal control strategy , the two kinds of all the controller parts excitation system controller design method . Single machine infinite bus system under conventional excitation system and device with excitation system simulation . Simulation results show that : the device with excitation system reactive power injection have the ability to improve power system damping , compared with conventional excitation system , the controller parts excitation system can more effectively maintain system stability and suppress low-frequency oscillation . Simulation results verify the controller design method is reasonable .

Related Dissertations

CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system automation > Automatically adjusts > Automatic adjustment of voltage and reactive power > Excitation group adjusted excitation regulator of the power system
© 2012 www.DissertationTopic.Net Mobile