本文選題：雙級矩陣變換器 + 功率開關(guān)故障��； 參考：《湘潭大學(xué)》2017年碩士論文

【摘要】：矩陣變換器(MC)具有優(yōu)良的輸入輸出性能、輸入功率因數(shù)可控、能量傳輸可逆、結(jié)構(gòu)緊湊等諸多優(yōu)點,在電力系統(tǒng)及電力傳動等領(lǐng)域有較大的應(yīng)用前景,這些領(lǐng)域?qū)β首儞Q器的運行可靠性均提出了較高的要求,故通過實時的在線診斷及適當(dāng)?shù)娜蒎e控制來提高MC系統(tǒng)的可靠性具有重要意義。目前已有文獻中提及的MC故障診斷方法和容錯控制策略主要針對單級矩陣變換器(CMC)拓撲提出的,本文主要對雙級矩陣變換器(TSMC)功率開關(guān)故障診斷及容錯控制策略進行研究。本文首先介紹了MC功率開關(guān)故障診斷方法和容錯控制策略的研究背景和意義,就目前已有的MC故障診斷方法和容錯控制策略進行了介紹與總結(jié);其次,對TSMC的拓撲結(jié)構(gòu)及其空間矢量調(diào)制策略進行了介紹。分別對TSMC在正常情況和功率開關(guān)故障下的運行模式進行了分析,并分別對整流級與逆變級功率開關(guān)故障下TSMC輸出線電壓的故障特征做了深入的分析,在此基礎(chǔ)上提出了基于開關(guān)組誤差電壓的TSMC功率開關(guān)故障診斷方法,該方法可以根據(jù)開關(guān)組誤差電壓鎖定故障開關(guān)組,并能從故障開關(guān)組中準(zhǔn)確定位故障開關(guān)。所提診斷法具有獨立于調(diào)制策略、診斷速度快、準(zhǔn)確率高且不易受負載運行狀態(tài)以及外界噪聲干擾等因素影響等諸多優(yōu)點,還克服了已有TSMC診斷法需檢測直流側(cè)電壓,增加傳感器這一不足,在一定程度降低了診斷系統(tǒng)的成本。然后,在分析已有MC容錯控制策略的基礎(chǔ)上,結(jié)合TSMC調(diào)制策略及拓撲結(jié)構(gòu)的特點,提出了適用于TSMC拓撲的橋臂冗余型容錯控制方法。最后,在Matlab/simulink仿真環(huán)境下分別搭建了TSMC功率開關(guān)故障診斷系統(tǒng)和容錯控制系統(tǒng)的仿真模型,并設(shè)計了故障診斷系統(tǒng)實驗平臺,以DSP和CPLD為控制核心,其主要包括主開關(guān)電路、驅(qū)動電路和信號調(diào)理電路等,仿真及實驗結(jié)果驗證了所提故障診斷方法和容錯控制策略的正確性和可行性。
[Abstract]:The matrix converter (MCC) has many advantages, such as excellent input and output performance, controllable input power factor, reversible energy transmission, compact structure and so on. These fields require high reliability of power converter, so it is very important to improve the reliability of MC system by real-time on-line diagnosis and proper fault-tolerant control. The methods of MC fault diagnosis and fault-tolerant control are mainly proposed for single-stage matrix converter (CMC) topologies. In this paper, fault diagnosis and fault-tolerant control strategies for power switches of two-stage matrix converters (TSMC) are studied. This paper first introduces the research background and significance of MC power switch fault diagnosis method and fault tolerant control strategy, introduces and summarizes the existing MC fault diagnosis method and fault tolerant control strategy. The topological structure and space vector modulation strategy of TSMC are introduced. The operation mode of TSMC under normal condition and power switch fault is analyzed, and the fault characteristics of TSMC output line voltage under rectifier stage and inverter stage power switch fault are analyzed respectively. On this basis, a fault diagnosis method of TSMC power switch based on the error voltage of switch group is proposed. This method can lock the fault switch group according to the error voltage of switch group, and can accurately locate the fault switch from the fault switch group. The proposed diagnosis method has many advantages, such as independent of modulation strategy, high diagnostic speed, high accuracy and not easy to be affected by factors such as load operation state and external noise, etc. It also overcomes the need to detect DC side voltage by existing TSMC diagnosis method. Adding sensors reduces the cost of diagnostic systems to a certain extent. Then, based on the analysis of the existing MC fault-tolerant control strategy and the characteristics of the TSMC modulation strategy and topology structure, a redundant fault-tolerant control method for the bridge arm is proposed, which is suitable for the TSMC topology. Finally, the simulation models of TSMC power switch fault diagnosis system and fault-tolerant control system are built in the Matlab/simulink simulation environment, and the experimental platform of fault diagnosis system is designed. The main switch circuit is mainly composed of DSP and CPLD as the control core. The simulation and experimental results of driving circuit and signal conditioning circuit verify the correctness and feasibility of the proposed fault diagnosis method and fault-tolerant control strategy.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM46

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本文編號：1898139