本文選題：礦井提升機(jī) + 模塊化多電平變流器　； 參考：《蘭州理工大學(xué)》2017年碩士論文

【摘要】：隨著電氣傳動技術(shù)的飛速發(fā)展,多電平變流器已在礦井提升機(jī)中得到了廣泛應(yīng)用,對改善設(shè)備性能和節(jié)能減排具有重大的意義。模塊化多電平變流器(Modular Multilevel Converter,MMC)以其獨(dú)特的結(jié)構(gòu)優(yōu)勢,彌補(bǔ)了傳統(tǒng)多電平變流器的許多不足,特別適用于中高壓大功率場合。將MMC應(yīng)用于礦井提升機(jī)具有較高的發(fā)展前景和實(shí)用價值。本文主要對用于礦井提升機(jī)控制的模塊化多電平變流器進(jìn)行了研究。首先,對比了目前應(yīng)用在礦井提升機(jī)中的三種多電平變流器結(jié)構(gòu)優(yōu)缺點(diǎn),分析了MMC自身的諸多優(yōu)點(diǎn)和不足。然后在礦井提升機(jī)的應(yīng)用背景下,介紹了MMC的工作原理、數(shù)學(xué)模型和調(diào)制方式,并研究了用于提升機(jī)控制的背靠背MMC前端PWM整流器的結(jié)構(gòu)和控制方法。其次,分析了MMC在應(yīng)用于礦井提升機(jī)運(yùn)行時子模塊電容電壓的波動規(guī)律。通過數(shù)學(xué)推導(dǎo)得到了電容電壓波動幅值的表達(dá)式,得出了電容電壓波動幅值與電流幅值和基波頻率之間的關(guān)系。研究了一種抑制電容電壓低頻波動的控制算法,將MMC低頻運(yùn)行時的電壓波動抑制在合理的范圍內(nèi),并通過Matlab/Simulink搭建模型對該控制算法進(jìn)行了仿真驗證。最后,設(shè)計和搭建了用于模擬礦井提升機(jī)運(yùn)行控制的三相10KW MMC實(shí)驗平臺,其中控制器采用DSP和CPLD的兩級控制結(jié)構(gòu)。對系統(tǒng)控制電路、主電路和子模塊電路的設(shè)計進(jìn)行了詳細(xì)說明。最后設(shè)計了提升機(jī)控制程序和驅(qū)動程序,并給出了相關(guān)實(shí)驗波形。
[Abstract]:With the rapid development of electrical transmission technology, multilevel converters have been widely used in mine hoists, which is of great significance to improve the performance of equipment and save energy. Modularized multilevel converter (Modular Multilevel converter MMC) makes up for many shortcomings of traditional multilevel converters due to its unique structural advantages and is especially suitable for high power and medium voltage applications. The application of MMC in mine hoist has high development prospect and practical value. In this paper, the modularized multilevel converter used in mine hoist control is studied. Firstly, the advantages and disadvantages of three kinds of multilevel converters used in mine hoist are compared, and the advantages and disadvantages of MMC itself are analyzed. Then under the application background of mine hoist, the working principle, mathematical model and modulation mode of MMC are introduced, and the structure and control method of back-to-back MMC front-end PWM rectifier for hoist control are studied. Secondly, the fluctuation law of capacitance voltage of sub-module is analyzed when MMC is applied to mine hoist. The expression of the amplitude of capacitance voltage fluctuation is obtained by mathematical derivation, and the relationship between the amplitude of capacitance voltage fluctuation and the amplitude of current and fundamental wave frequency is obtained. A control algorithm to suppress the low frequency fluctuation of capacitor voltage is studied. The voltage fluctuation in the low frequency operation of MMC is restrained within a reasonable range, and the simulation results of the control algorithm are verified by building a model of Matlab/Simulink. Finally, a three-phase 10KW MMC experimental platform is designed and built to simulate the operation and control of mine hoist. The controller adopts the two-stage control structure of DSP and CPLD. The system control circuit, main circuit and sub-module circuit are described in detail. Finally, the control program and driver program of the hoist are designed, and the related experimental waveforms are given.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD633;TM46

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