發(fā)布時間：2018-04-20 09:33

  本文選題：三相三線制 + VIENNA��； 參考：《華南理工大學》2014年碩士論文

【摘要】：在科學技術(shù)日益發(fā)達的現(xiàn)代社會，作為最早的變電裝置——整流器越來越廣泛地應用在社會生產(chǎn)的各行各業(yè)中，但是這些整流裝置會造成電網(wǎng)電壓的質(zhì)量降低和電能利用率下降等問題。在提倡節(jié)能減排的今天，治理電網(wǎng)污染的課題得到了人們廣泛的研究�；赑WM控制的整流器具有輸入電流正弦化、電流諧波含量小和處于單位功率因數(shù)狀態(tài)運行等特點，因此它作為電力電子裝置的功率因數(shù)校正單元得到了廣泛的應用。三相三線制VIENNA整流器是三電平整流裝置，相比傳統(tǒng)的三相半橋兩電平整流器，它具有全控開關(guān)數(shù)量少、無需考慮死區(qū)時間和應用場合更廣等特點。 三相三線制VIENNA整流器是一個強耦合、非線性系統(tǒng)。因為三電平整流器的電位狀態(tài)組合比兩電平整流器更多，所以基于SVPWM的控制系統(tǒng)更復雜。論文主要是對一種數(shù)字控制的三相三線制VIENNA整流器的研究和工程設計，主要工作如下： 第一，論文首先介紹了三相整流器和三電平整流器的研究進程，分別在單相和三相電路拓撲下分析了VIENNA整流器的工作原理，提出了等效三邏輯值單開關(guān)概念。在對工作原理和坐標變換矩陣分析基礎(chǔ)上，分別建立了三相靜止坐標系和兩相同步旋轉(zhuǎn)坐標系下三相VIENNA整流器的數(shù)學模型，，得到了數(shù)學模型的矩陣方程組。 第二，根據(jù)建模所得矩陣方程組，設計了三相三線制VIENNA整流器的控制系統(tǒng)，電壓外環(huán)和電流內(nèi)環(huán)采用雙環(huán)PI控制策略；其中電流內(nèi)環(huán)用到前饋解耦策略。按典型系統(tǒng)設計整定雙環(huán)PI參數(shù)，給出PI參數(shù)的參考公式。 第三，介紹了三相三線制VIENNA整流器的空間矢量調(diào)制方式，分析了三種方式下整流的空間矢量調(diào)制原理;提出了一種基于空間矢量調(diào)制方式的中點電位平衡控制策略；給定實驗參數(shù)，計算選擇硬件系統(tǒng)元件參數(shù)和，計控制電路，分析了軟件系統(tǒng)的各流程圖。 最后，在MATLAB平臺上仿真系統(tǒng)，搭建實驗裝置，給出實驗結(jié)果。
[Abstract]:In the modern society where science and technology are increasingly developed, as the earliest transformers, rectifiers are more and more widely used in various industries of social production. However, these rectifier devices will lead to the reduction of voltage quality and power utilization ratio. Today, energy conservation and emission reduction are advocated, the problem of grid pollution control has been widely studied. The rectifier based on PWM has the characteristics of sinusoidal input current, low current harmonic content and running in unit power factor state, so it has been widely used as power factor correction unit in power electronic devices. Three-phase three-wire VIENNA rectifier is a three-level rectifier. Compared with the traditional three-phase half-bridge two-level rectifier, it has fewer full-control switches and no need to consider the dead-time and wider applications. Three-phase three-wire VIENNA rectifier is a strongly coupled, nonlinear system. Because the potential state combination of three-level rectifier is more than that of two-level rectifier, the control system based on SVPWM is more complex. This paper mainly focuses on the research and engineering design of a digitally controlled three-phase three-wire VIENNA rectifier. The main work is as follows: Firstly, the paper introduces the research progress of three-phase rectifier and three-level rectifier, analyzes the working principle of VIENNA rectifier under the topology of single-phase and three-phase circuit, and puts forward the concept of equivalent three-logic value single-switch. Based on the analysis of the working principle and the coordinate transformation matrix, the mathematical models of the three-phase VIENNA rectifier in the three-phase stationary coordinate system and the two-phase synchronous rotating coordinate system are established, and the matrix equations of the mathematical model are obtained. Secondly, according to the matrix equations, the control system of three-phase three-wire VIENNA rectifier is designed. The voltage outer loop and current inner loop adopt double loop Pi control strategy, and the current inner loop uses feedforward decoupling strategy. According to the design of typical system, the Pi parameter of double loop is adjusted, and the reference formula of Pi parameter is given. Thirdly, the space vector modulation method of three-phase three-wire VIENNA rectifier is introduced, the principle of space vector modulation of rectifier under three modes is analyzed, and a midpoint potential balance control strategy based on space vector modulation is proposed. Given the experimental parameters, the parameters of the hardware system and the control circuit are calculated and the flow charts of the software system are analyzed. Finally, the simulation system is built on MATLAB platform, and the experimental results are given.
【學位授予單位】：華南理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM461

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本文編號：1777226