控制太陽能,可靠性和穩(wěn)定性是兩個主要挑戰(zhàn)。此外,總諧波失真（THD）必須在最佳操作范圍內(nèi)。在逆變器中,直流轉(zhuǎn)換為交流過程中會伴隨諧波產(chǎn)生,這將影響電力電子設(shè)備的性能。因此,為了克服高壓和高功率系統(tǒng)中的這種挑戰(zhàn),對多級逆變器（MLI）的拓?fù)溲芯烤哂兄匾囊饬x。這種類型的逆變器使用各直流電壓電平在其輸出端產(chǎn)生階梯式交流電壓,接近正弦曲線形狀�；诩壜�(lián)H橋、電容鉗位和二極管鉗位逆變器,提出了一種多電平逆變器的拓?fù)浣Y(jié)構(gòu)。該拓?fù)浣Y(jié)構(gòu)在光伏模糊邏輯控制系統(tǒng)中具有更廣泛適應(yīng)性。本文特別關(guān)注光伏發(fā)電作為系統(tǒng)電源的仿真,并展示了單相11級H橋型逆變器（CHB）的潛力。為了切換IGBT器件,應(yīng)用正弦脈沖寬度調(diào)制（SPWM）。此外,建立了模糊邏輯控制（FLC）模型,有效改善了電能質(zhì)量。應(yīng)用模糊邏輯控制模型尋找適當(dāng)?shù)拈_關(guān)信號降低了總諧波失真。為了顯示11級H橋型逆變器的操作改進(jìn)和減少復(fù)雜的聲信號效應(yīng),所提出的系統(tǒng)采用Matlab/Simulink軟件設(shè)計。最后,結(jié)果表明模糊邏輯控制的動態(tài)行為比傳統(tǒng)的比例積分微分（PID）控制器好得多。 

【文章來源】：華北電力大學(xué)(北京)北京市 211工程院校 教育部直屬院校

【文章頁數(shù)】：53 頁

【學(xué)位級別】：碩士

【文章目錄】：
摘要
ABSTRACT
CHAPTER ONE: INTRODUCTION AND BACKGROUND
    1.1 INTRODUCTION
    1.2 THE MAIN OBJECTIVES
    1.3 METHODOLOGY
    1.4 PROJECT LAYOUT
CHAPTER TWO: HISTORY AND LITERATURE REVIEW
    2.1 PHOTOVOLTAIC SYSTEMS
    2.2 PHOTOVOLTAIC ENERGY EQUIPMENT:
        2.2.1 Design of Photovoltaic (PV) System:
        2.2.2 Inverters
        2.2.3 Batteries
        2.2.4 Charge Controller and Balance of System Components (BOS)
    2.3 MULTI-LEVEL INVERTERS
        2.3.1 Introduction
        2.3.2 Inverter Topologies:
            2.3.2.1 Diode Clamped Inverter
            2.3.2.2 Capacitor Clamped Inverter
            2.3.2.3 Cascaded H-Bride Multi-Level Inverter (CHB-MLI)
                2.3.2.3.1 Operation and Development of CHB-MLI
    2.4 MODULATION STRATEGY OF MULTI-LEVEL INVERTERS
    2.5 FUZZY CONTROL
        2.5.1 Advantages of Fuzzy Controller vs proportional-integral-derivativecontrol(PID)
        2.5.2 Fuzzy Logic Controller(FLC)
    2.6 CONCLUSIONS
CHAPTER THREE:MATHEMATICAL MODELING AND DESIGN OFCHB-MLI AND FLC FOR PV SYSTEM
    3.1 BLOCK DIAGRAM OF PROPOSED SYSTEM
    3.2 PV ARRAY MODEL
        3.2.1 Mathematical Model
    3.3 MODELLING AND DESIGN CHB-MLI FOR PV APPLICATIONS
        3.3.1 Selective Harmonic Elimination(SHE)
        3.3.2 SPWM Method
    3.4 Fuzzy LOGIC CONTROLLER WITH CHB-MLI AND PV ARRAY
    3.5 CONCLUSIONS
CHAPTER FOUR: SIMULATION RESULS AND DISCUSSIONS
    4.1 PV ARRAY
    4.2 CASCADED H-BRIDGE 11-LEVEL INVERTER WITH FLC
    4.3 CASCADED H-BRIDGE 11-LEVLL INVERTER WITH PID CONTROLLER
    4.4 CONCLUSIONS
CHAPTER FIVE: CONCLUSIONS AND RECOMMENDATIONS
    5.1 CONCLUSIONS
    5.2 RECOMMENDATIONS
REFERENCES
PAPERS AND OTHER RESULTS PUBLISHED DURING THE MASTER'SDEGREE
ACKNOWLEDGEMENT



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