畢業論文

打賞
當前位置: 畢業論文 > 自動化 >

光伏發電并網端口濾波器的設計與電能質量研究

時間:2019-06-02 19:38來源:畢業論文
從電能質量方面進行并網端口的濾波器設計與研究,對光伏發電并網端口常見的三種濾波器L/LC/LCL 型濾波器進行詳細分析與比較計算,最后對 LCL 型濾波器進行參數設計與仿真實現

摘要光伏發電是太陽能利用中最好的一個利用形式,光伏發電系統的技術、發電規模及商業化發展已經在分布式發電中得到很好的普及與推廣。 光伏并網發電作為一種綠色清潔能源具備可再生以及污染少等優點成為最具潛力的分布式發電方式。然而光伏并網發電逆變器輸出與電網同頻同相交流電的同時需要考慮輸出電能質量問題,隨著分布式新能源特別是光伏并網發電的普及,電能質量的研究日益受關注,電能質量的一個明顯表現形式是諧波量,電力電子器件的發展和普及在工業, 電力系統等領域出現諧波污染,因此,本文從電能質量方面進行并網端口的濾波器設計與研究,對光伏發電并網端口常見的三種濾波器L/LC/LCL 型濾波器進行詳細分析與比較計算,最后對 LCL 型濾波器進行參數設計與仿真實現,根據理論分析的理論模型搭建 MATLAB 仿真,同時給出逆變器相對的控制方式與策略。 對于傳統并網逆變器的濾波方式通常采用 L與 LC 型濾波器通過逆變橋與電網及交流負載側相連,濾波器主要用來抑制高頻諧波對電網造成污染。經過理論分析,在相同的電感大小情況下,LCL 型的濾波器比起 L 及 LC 型的濾波器具備更好的諧波抑制能力,在合適的控制方式下得到更好的濾波效果,這種濾波方式更適合用在穩定性要求較高的大功率逆變器中。本文同時對光伏并網發電系統中一些關鍵問題進行研究, 包括第二章光伏電池的非線性特征模型,第三章逆變器拓撲結構及并網逆變器控制方法中的 SVPWM控制、搭建相應的模型仿真分析其優越性,第四章分析常見的濾波結構,第五章對濾波器進行設計與仿真,通過仿真分析表明,在三相逆變器中,采用 SVPWM 的 LCL 型濾波器的雙閉環控制具備優良的控制效果。35974

源`自*六)維[論*文'網www.aftnzs.live


畢業論文關鍵詞: 光伏電池;并網逆變器;SVPWM 控制; LCL 型濾波器
The Research and Design of PV Ports filterand Power quality
AbstractIn new energy, Solar power is the most mature technology, and one of the largest commercialdevelopment conditions and development prospects of the power generation, carrying outresearch to promote the application of photovoltaic power generation is the trend. As a cleangreen renewable energy, Photovoltaic power generation with less pollution, becomes the mostpotential of distributed power generation.However, grid-connected PV inverter output and grid-phase alternating current with the samefrequency, at the same time, it is also need to consider the quality of output power,.With thenew distributed energy, especially the popularity of photovoltaic power generation, Powerquality increasing concern, a clear manifestation of power quality is harmonic content, thedevelopment and popularization of power electronic devices appear harmonic pollution inindustry, electric power systems. Therefore, due to the Power Quality, three common FiltersL/LC/LCL of network ports for detailed analysis and comparison of calculation are researchedand being Designed in this paper. Finally, design the LCL filter parameters and Simulate,tocorrespond the appropriate simulation model and the control strategy.Traditional grid-connectedinverter connected to the grid and AC load though the inverter bridge by single L-type filter andLC-type,the filter is used to suppress higher harmonics generated by the inverter into thegrid.Through theoretical analysis,in the same total inductance, LCL-type filter is better thanL-type filter and LC-type in high-order harmonic suppression,and has Better filtering effectunder the appropriate control mode,and more suitable to be used in the power grid inverter.this paper makes a research for some key issues of grid-connected PV systems, includingnonlinear characteristics model of photovoltaic cells in Chapter II, and the SVPWM control andmodel simulation analysis of its superiority in inverter topologies and grid-connected invertercontrol method in Chapter III,and analyzes the structure of the common filter in Chapter IV,andThe filter design and simulation in Chapter V,The simulation results show that the three-phaseinverter, using dual-loop control of SVPWM of LCL filter has excellent control effect. 光伏發電并網端口濾波器的設計與電能質量研究:http://www.aftnzs.live/zidonghua/20190602/34212.html
------分隔線----------------------------
推薦內容
双色球走势图带连线