本文選題：準Z源逆變器　切入點：光伏并網(wǎng)　出處：《華北電力大學》2017年碩士論文　論文類型：學位論文

【摘要】：能源與社會的發(fā)展息息相關,傳統(tǒng)能源的短缺以及其對環(huán)境的污染,促使了人們對可再生清潔能源的重視。各種新能源發(fā)電系統(tǒng),如燃料電池、風力發(fā)電、光伏發(fā)電、潮汐發(fā)電等得到了大力發(fā)展。而光伏發(fā)電作為其中最清潔、最安全、潛力最大的發(fā)電方式,成為業(yè)界的研究熱點。光伏電池的輸出為直流電,需要經(jīng)過逆變電路,將直流電轉換為交流電,經(jīng)濾波后并入電網(wǎng)。由于傳統(tǒng)電壓型(電流型)逆變器只能降(升)壓的局限性,本文對一種新型的逆變拓撲——單相準Z源逆變器進行了研究。在文中首先對電流連續(xù)型的準Z源逆變器的穩(wěn)態(tài)工作原理進行了理論分析,簡述了其升壓控制方法,以及在簡單升壓控制下的阻抗網(wǎng)絡參數(shù)設置。為了分析系統(tǒng)的動態(tài)性能,根據(jù)狀態(tài)空間平均法建立了小信號模型,得到輸入變量與狀態(tài)變量之間的傳遞函數(shù)與其零根軌跡圖,分析了參數(shù)對系統(tǒng)動態(tài)響應的影響。進而對單相準Z源逆變器的光伏并網(wǎng)進行了研究,采用電容電壓恒壓控制方法,該控制方法使電容電壓保持恒定,從而使輸入功率和輸出功率解耦。在并網(wǎng)電流控制中采用能夠實現(xiàn)抗電網(wǎng)電壓干擾和無靜差的準PR控制器,并對其參數(shù)進行了整定。而后通過Matlab/Simulink進行了仿真,驗證了電容電壓恒壓控制方法的有效性,并采用變步長的擾動觀察法,實現(xiàn)了系統(tǒng)輸出的最大功率點追蹤。
[Abstract]:Energy is closely related to the development of society. The shortage of traditional energy and its pollution to the environment make people pay more attention to renewable and clean energy. All kinds of new energy generation systems, such as fuel cells, wind power, photovoltaic power generation, Tidal power generation has been greatly developed. Photovoltaic power generation as one of the cleanest, safest and most potential power generation methods has become a research hotspot in the industry. The output of photovoltaic cells is direct current, which requires inverter circuit. Conversion of DC to AC is filtered and incorporated into the grid. Because of the limitation that conventional voltage-source (current-source) inverters can only drop (raise) voltage, In this paper, a new inverter topology, single-phase quasi-Z-source inverter, is studied. Firstly, the steady state operation principle of the current-continuous quasi-Z-source inverter is theoretically analyzed, and its boost control method is briefly described. In order to analyze the dynamic performance of the system, a small signal model is established according to the state space averaging method, and the transfer function between the input variable and the state variable and its zero root locus are obtained. The influence of parameters on the dynamic response of the system is analyzed. Furthermore, the grid-connected photovoltaic system of single-phase quasi-Z-source inverter is studied. The capacitor voltage constant voltage control method is used to keep the capacitance voltage constant. Thus, the input power and output power are decoupled. In grid-connected current control, a quasi-PR controller, which can resist voltage interference and no static error, is adopted, and its parameters are adjusted. Then the simulation is carried out by Matlab/Simulink. The effectiveness of the capacitor voltage constant voltage control method is verified, and the maximum power point tracking of the system output is realized by using the variable step size perturbation observation method.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM464

【參考文獻】

相關期刊論文 前10條

1 楊海柱;劉潔;吳菲;;基于準Z源逆變器的光伏并網(wǎng)控制策略研究[J];河南理工大學學報(自然科學版);2013年03期

2 賀永輝;李嵐;;光伏電池最大功率點跟蹤方法比較[J];工礦自動化;2013年06期

3 胡文翠;王明渝;錢坤;;LCL型并網(wǎng)逆變器電流控制器設計[J];電力系統(tǒng)保護與控制;2013年08期

4 薛家祥;鐘良文;張思章;張紅衛(wèi);廖天發(fā);張曉莉;;光伏系統(tǒng)中擾動觀察法的控制方法研究[J];電氣傳動;2013年03期

5 ;可再生能源發(fā)展“十二五”規(guī)劃[J];太陽能;2012年16期

6 宋亮;王曉東;劉雯;徐銳;楊富華;;光伏電池MPPT擾動觀察法的研究現(xiàn)狀[J];半導體光電;2012年04期

7 李瀟瀟;趙爭鳴;田春寧;鞠振河;;不可調(diào)度式光伏并網(wǎng)逆變系統(tǒng)綜述[J];電氣技術;2012年01期

8 蔡春偉;曲延濱;盛況;;Z源逆變器的改進型最大恒定升壓調(diào)制策略[J];電機與控制學報;2011年12期

9 周孑民;郭智群;晏s，

本文編號：1596124