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The Research of Dynamic Voltage Restorer’s Compensation Technology

Author: ShenYiGe
Tutor: FuZhouXing
School: Xi'an University of Science and Technology
Course: Proceedings of the
Keywords: Voltage drop Dynamic Voltage Restorer Detection methods SPWM Control method
CLC: TM761.1
Type: Master's thesis
Year: 2008
Downloads: 142
Quote: 3
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Abstract


With the development of science and technology , a large number of applications for a variety of sensitivity load , making the power user requirements of power quality is getting higher and higher , the voltage drop has become a significant problem in the power quality . Dynamic Voltage Restorer (DVR) , as an important member of the the user power electronics technology , has a good dynamic performance , making it the most effective governance voltage drop device . DVR by the difference between the standard voltage and system voltage injected to the system to compensate for the distortion of the system voltage , it can not only solve the voltage drop , bump and other dynamic voltage quality problems can also compensate for the steady-state voltage three-phase unbalanced voltage harmonics quality problems , is one of the hot research at home and abroad . DVR to effectively solve the voltage drop in real-time and accurately detect the voltage drop is the most important issue ; Dynamic Voltage Restorer Another issue to be studied is the problem of the control strategies of DVR . This paper mainly around the issues . First detailed introduction to the composition of the various parts of the DVR device consists of three single- phase full-bridge inverter control dynamic voltage restorer topology ; several voltage drop detection methods are analyzed and compared . end use of the improved single - phase dq detection algorithm ; derived using SPWM method single phase DVR compensation voltage drop principle ; for the shortcomings of the existing control mode , select the feedforward control using the hybrid control strategy, plus the feedback control and effective solution feedforward control aspects of the damping is weak , mainly the stability margin of the shortcomings and can not meet the load changes . Above design environment MATLAB simulation package SIMULINK simulation to achieve detection algorithms and control strategies to build a simulation model , simulation results demonstrate the algorithm has good real-time and accuracy , confirmed In this paper, the design of DVR correctness and real-time voltage compensation .

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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
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