【摘要】：多電平（Multilevel）逆變器廣泛應(yīng)用于大功率交流調(diào)速、有源濾波器、船舶推進(jìn)等中高壓、大功率工業(yè)場(chǎng)合。與傳統(tǒng)變換器相比，多電平變換器具有輸出性能好，諧波含量低，開關(guān)損耗低，電磁干擾小等優(yōu)點(diǎn)。本文以二極管箝位型五電平逆變器為研究對(duì)象，對(duì)多電平中的關(guān)鍵技術(shù)進(jìn)行研究。 首先，介紹了NPC/H等多電平逆變器的拓?fù)浣Y(jié)構(gòu)，重點(diǎn)分析了二極管箝位型五電平逆變器的工作原理。介紹了SVPWM空間矢量調(diào)制算法及七段式開關(guān)序列的設(shè)計(jì)，研究了四種簡(jiǎn)化空間矢量脈寬調(diào)制策略：基于m-n坐標(biāo)系算法、無坐標(biāo)系算法、基于兩電平分解算法以及分類算法，并應(yīng)用于五電平矢量調(diào)制中，調(diào)制策略相對(duì)傳統(tǒng)SVPWM調(diào)制方法簡(jiǎn)化了基本矢量的選取和作用時(shí)間的計(jì)算，省去了大量三角函數(shù)運(yùn)算，節(jié)省了處理器的資源，通過仿真及實(shí)驗(yàn)證明了調(diào)制策略的正確性和有效性。 其次，為了改善逆變器的輸出性能、充分利用直流側(cè)電壓，獲得最大電磁轉(zhuǎn)矩，本文針對(duì)五電平逆變器過調(diào)制控制策略進(jìn)行深入研究。分別探討了基于兩電平分解、分類算法及疊加原理的過調(diào)制處理方案，，給出了輸出基波電壓和諧波頻譜，說明參考電壓矢量能夠從線性調(diào)制區(qū)域向過調(diào)制區(qū)域平滑過渡，擴(kuò)大逆變器的運(yùn)行范圍。仿真和實(shí)驗(yàn)驗(yàn)證了過調(diào)制策略的有效性和準(zhǔn)確性。 再次，分析研究了五電平矢量控制系統(tǒng)，以永磁同步電機(jī)作為五電平逆變器負(fù)載。分析了永磁同步電機(jī)的數(shù)學(xué)模型，討論了轉(zhuǎn)子磁鏈定向的id=0控制。仿真及實(shí)驗(yàn)表明id=0控制方式下的五電平矢量控制系統(tǒng)具有良好的動(dòng)、靜態(tài)性能，電機(jī)的轉(zhuǎn)速和位置可以實(shí)現(xiàn)快速跟蹤，而且誤差很小，實(shí)現(xiàn)了電機(jī)的最大轉(zhuǎn)矩控制。 最后，本文完成了NPC五電平逆變器主電路及控制系統(tǒng)的軟、硬件設(shè)計(jì)，以TMS320F28335DSP和XC3S400FPGA為核心的控制系統(tǒng)搭建了NPC五電平逆變器實(shí)驗(yàn)平臺(tái)，并基于該實(shí)驗(yàn)平臺(tái)完成了本文所采用控制策略的相關(guān)實(shí)驗(yàn)的研究。
[Abstract]:Multilevel (Multilevel) inverter is widely used in high power AC speed regulation, active filter, ship propulsion and other high voltage, high power industrial occasions. Compared with conventional converters, multilevel converters have the advantages of better output performance, lower harmonic content, lower switching loss and less electromagnetic interference. In this paper, the key techniques of multilevel inverter are studied based on diode-clamped five-level inverter. Firstly, the topology of multilevel inverter such as NPC/H is introduced, and the working principle of diode clamped five-level inverter is analyzed. This paper introduces the design of SVPWM space vector modulation algorithm and seven-segment switch sequence, and studies four simplified space vector pulse width modulation strategies: based on m-n coordinate system algorithm, non-coordinate system algorithm, two-level decomposition algorithm and classification algorithm. Compared with the traditional SVPWM modulation method, the modulation strategy simplifies the selection of the basic vector and the calculation of the working time, saves a large number of trigonometric function operations, and saves the processor resources. The correctness and effectiveness of the modulation strategy are proved by simulation and experiment. Secondly, in order to improve the output performance of the inverter and make full use of the DC side voltage to obtain the maximum electromagnetic torque, the overmodulation control strategy of the five-level inverter is studied in this paper. The over-modulation processing scheme based on two-level decomposition, classification algorithm and superposition principle is discussed, and the output fundamental voltage and harmonic spectrum are given. It is shown that the reference voltage vector can smooth transition from linear modulation region to over-modulation region. Expand the scope of operation of the inverter. Simulations and experiments verify the effectiveness and accuracy of the overmodulation strategy. Thirdly, the five-level vector control system is analyzed and studied. The permanent magnet synchronous motor (PMSM) is used as the load of the five-level inverter. The mathematical model of permanent magnet synchronous motor (PMSM) is analyzed, and the id=0 control of rotor flux orientation is discussed. Simulation and experiments show that the five-level vector control system based on id=0 has good dynamic and static performance, the speed and position of the motor can be tracked quickly, and the error is very small, and the maximum torque control of the motor is realized. Finally, the software and hardware design of the main circuit and control system of NPC five-level inverter is completed. The experimental platform of NPC five-level inverter is built with TMS320F28335DSP and XC3S400FPGA as the core control system. Based on the experimental platform, the related experiments of the control strategy adopted in this paper are completed.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM464

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張艷芳,林飛,馬志文,鄭瓊林;兩種SVPWM過調(diào)制方法的比較研究[J];北京交通大學(xué)學(xué)報(bào);2005年02期

2 齊悅,楊耕,竇曰軒;基于多電平變換逆變電路的拓?fù)浞治鯷J];電機(jī)與控制學(xué)報(bào);2002年01期

3 王鴻雁,何湘寧,劉振來,趙榮祥;多電平逆變器軟開關(guān)技術(shù)的研究[J];電力電子技術(shù);2003年01期

4 夏加寬;黃劍龍;包巖峰;;電流型多電平變流器拓?fù)浞治鯷J];電力自動(dòng)化設(shè)備;2008年08期

5 符曉;伍小杰;于月森;姜小艷;葛娟;;基于g-h坐標(biāo)系SVPWM算法三電平PWM整流器的研究[J];電氣傳動(dòng);2009年06期

6 李陽;戴鵬;于月森;曹興;蔣正友;;三電平逆變器SVPWM過調(diào)制控制策略綜述[J];電氣傳動(dòng);2010年07期

7 于月森;趙成成;符曉;吳迪;;基于g-h坐標(biāo)系SVPWM控制算法5電平逆變器仿真研究[J];電氣傳動(dòng);2011年12期

8 曹興;朱榮伍;;基于分類算法的空間電壓矢量PWM過調(diào)制策略研究[J];變頻器世界;2011年03期

9 劉偉明;朱忠尼;;光耦合器HCPL-316J在IGBT驅(qū)動(dòng)電路中的應(yīng)用[J];空軍雷達(dá)學(xué)院學(xué)報(bào);2008年02期

10 陳阿蓮,何湘寧;一種具有中點(diǎn)電位平衡功能的混合箝位型多電平逆變器[J];中國電機(jī)工程學(xué)報(bào);2005年01期

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