小功率光伏并網(wǎng)逆變器研究
[Abstract]:Distributed photovoltaic grid-connected technology has been greatly developed in recent years and has become a research hotspot. Low-power photovoltaic grid-connected inverter is an important part of distributed photovoltaic grid-connected system. The efficiency of grid-connected photovoltaic system can be greatly improved by using MPPT technology. In this paper, the topology structure of low power photovoltaic grid-connected inverter (MPPT) and quasi-proportional resonant inverter control are studied. In this paper, the output characteristics of photovoltaic cells under single illumination and local shadows are studied. The improved two-step MPPT, algorithm combines the advantages of particle swarm optimization (PSO) and conductance increment method (INC) to solve the multi-extremum phenomenon of photovoltaic cell output under local shadow. PSO is used to find the approximate range of the maximum power point when the illumination changes, and then INC is used to track the maximum power point. The working principle and control mode of inverter are analyzed in this paper. Quasi PR control is introduced into the current inner loop. The quasi-PR control technology has a static error of approximately zero and excellent ability to rely on disturbance, and the power feedforward control is added to improve the dynamic performance of the system. Finally, the hardware circuit of single-stage photovoltaic grid-connected inverter is designed, including inverter circuit, control circuit, signal sampling and conditioning circuit. The software of the system is designed to realize MPPT and grid-connected current control. The feasibility of MPPT algorithm is verified by experiments, and the THD of inverter output current meets the grid connection requirements.
【學(xué)位授予單位】:北京交通大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TM464;TM615
【參考文獻】
相關(guān)期刊論文 前10條
1 李琮;楊志堅;;基于DSP的單級式光伏并網(wǎng)逆變器研究[J];電力電子技術(shù);2011年01期
2 王立喬;;正弦波逆變器脈寬調(diào)制技術(shù)的調(diào)制模型分析[J];電力系統(tǒng)自動化;2008年17期
3 姜世公;王衛(wèi);王盼寶;劉桂花;;基于功率前饋的單相光伏并網(wǎng)控制策略[J];電力自動化設(shè)備;2010年06期
4 張路;孫志毅;何秋生;;基于AVR的雙極性SPWM調(diào)制逆變技術(shù)[J];工業(yè)控制計算機;2012年05期
5 劉暾東;陳得寶;李素文;王穎;;基于自適應(yīng)認知域的粒子群性能改進方法[J];模式識別與人工智能;2009年05期
6 樊景峰;吳加富;;用脈沖響應(yīng)不變法設(shè)計IIR數(shù)字低通濾波器[J];濮陽職業(yè)技術(shù)學(xué)院學(xué)報;2010年01期
7 沈慧鈞;羅霄華;王思偉;;用雙線性變換法設(shè)計IIR濾波器[J];山西電子技術(shù);2008年06期
8 劉邦銀;段善旭;康勇;;局部陰影條件下光伏模組特性的建模與分析[J];太陽能學(xué)報;2008年02期
9 楊飛;惠晶;;基于Fibonacci搜索的光伏發(fā)電MPPT控制策略[J];現(xiàn)代電子技術(shù);2009年08期
10 曹文思;楊育霞;;基于狀態(tài)空間平均法的BOOST變換器仿真分析[J];系統(tǒng)仿真學(xué)報;2007年06期
相關(guān)博士學(xué)位論文 前1條
1 于蓉蓉;光伏發(fā)電關(guān)鍵技術(shù)及電動汽車充電站可靠性研究[D];北京交通大學(xué);2011年
,本文編號:2234362
本文鏈接:http://sikaile.net/kejilunwen/dianlilw/2234362.html