本文選題：TSMC + 故障診斷�。� 參考：《湘潭大學(xué)》2017年碩士論文

【摘要】：雙級(jí)矩陣變換器(TSMC)具有功率因數(shù)可調(diào)、輸入輸出性能優(yōu)良、能量雙向流動(dòng)及結(jié)構(gòu)緊湊等優(yōu)點(diǎn),在電力系統(tǒng)、電力傳動(dòng)等領(lǐng)域具有較大的應(yīng)用前景,這些應(yīng)用場(chǎng)合都需要系統(tǒng)能長(zhǎng)期穩(wěn)定、可靠地運(yùn)行。然而,TSMC由于功率開關(guān)數(shù)量多、工作環(huán)境復(fù)雜等原因其發(fā)生故障的概率較大,阻礙了TSMC的市場(chǎng)化應(yīng)用。因此,對(duì)TSMC進(jìn)行故障診斷研究使其在故障后能及時(shí)的得到保護(hù)具有很大的研究意義。本文運(yùn)用電壓法對(duì)TSMC功率開關(guān)故障進(jìn)行研究。本文的主要研究?jī)?nèi)容如下:首先,本文介紹了課題的研究背景和意義,并分別對(duì)基于電流法和基于電壓法的常規(guī)矩陣變換器(CMC)和TSMC的故障診斷方法進(jìn)行了詳細(xì)分析。介紹了TSMC的拓?fù)浣Y(jié)構(gòu)以及輸入輸出之間的函數(shù)關(guān)系,并對(duì)整流級(jí)和逆變級(jí)雙空間矢量調(diào)制下TSMC的工作原理進(jìn)行了分析。其次,分別對(duì)TSMC正常和發(fā)生故障后的運(yùn)行模式進(jìn)行了分析,根據(jù)故障后負(fù)載電流的流向,分別得到了整流級(jí)和逆變級(jí)功率開關(guān)開路后TSMC輸出相電壓的故障特征,并總結(jié)了兩者之間故障特征的異同。針對(duì)整流級(jí)和逆變級(jí)開關(guān)故障有時(shí)會(huì)產(chǎn)生相同的輸出相電壓故障特征而難以準(zhǔn)確定位故障開關(guān),結(jié)合逆變級(jí)空間矢量調(diào)制的特點(diǎn),本文提出了在逆變級(jí)與故障開關(guān)同層橋臂有兩個(gè)開關(guān)導(dǎo)通時(shí),根據(jù)此時(shí)的開關(guān)組誤差電壓個(gè)數(shù)以及開關(guān)狀態(tài)定位故障開關(guān)的方法。所提診斷方法具有診斷準(zhǔn)確、無需檢測(cè)直流側(cè)電壓、診斷速度快、實(shí)現(xiàn)簡(jiǎn)單等優(yōu)點(diǎn)。搭建了基于所提診斷方法的仿真模型,仿真結(jié)果驗(yàn)證了所提診斷方法的正確性。最后,搭建了TSMC故障診斷的實(shí)驗(yàn)平臺(tái),詳細(xì)介紹了主開關(guān)的選取、緩沖電路、驅(qū)動(dòng)電路、信號(hào)調(diào)理電路的設(shè)計(jì)方法;并設(shè)計(jì)了以TMS320F28335+EPM570為控制器的軟件系統(tǒng)以實(shí)現(xiàn)所提故障診斷方法。對(duì)實(shí)驗(yàn)結(jié)果進(jìn)行了分析,實(shí)驗(yàn)結(jié)果驗(yàn)證了所提診斷方法的正確性和有效性。
[Abstract]:Two-stage matrix converter (TSMC) has the advantages of adjustable power factor, excellent input and output performance, bi-directional energy flow and compact structure. It has great application prospect in power system, power transmission and other fields. These applications require the system to run steadily and reliably for a long time. However, due to the large number of power switches and complex working environment, the TSMC has a high probability of failure, which hinders its market-oriented application. Therefore, it is of great significance to study the fault diagnosis of TSMC so that it can be protected in time. In this paper, the voltage method is used to study the fault of TSMC power switch. The main contents of this paper are as follows: firstly, the background and significance of the research are introduced, and the fault diagnosis methods of conventional matrix converters based on current method and voltage method are analyzed in detail. This paper introduces the topological structure of TSMC and the function relationship between input and output, and analyzes the working principle of TSMC under double space vector modulation of rectifier stage and inverter level. Secondly, the operation mode of TSMC is analyzed respectively. According to the flow direction of load current after failure, the fault characteristics of output phase voltage of TSMC after rectifier stage and inverter stage power switch are obtained, respectively. The similarities and differences of fault characteristics between them are summarized. The fault of rectifier stage and inverter stage sometimes produces the same fault characteristics of output phase voltage, so it is difficult to locate the fault switch accurately, combining with the characteristics of inverter stage space vector modulation. This paper presents a method to locate the fault switch according to the number of the error voltages of the switch group and the switching state when the inverter stage has two switches on the same layer of the bridge arm of the fault switch. The proposed diagnostic method has the advantages of accurate diagnosis, no need to detect DC voltage, fast diagnosis speed and simple realization. The simulation model based on the proposed diagnosis method is built, and the simulation results verify the correctness of the proposed diagnosis method. Finally, the experiment platform of TSMC fault diagnosis is built, and the design method of main switch, buffer circuit, drive circuit and signal conditioning circuit are introduced in detail. A software system based on TMS320F28335 EPM570 controller is designed to realize the proposed fault diagnosis method. The experimental results show that the proposed diagnosis method is correct and effective.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM46

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本文編號(hào)：1908551