發(fā)布時間：2018-01-16 09:47

  本文關(guān)鍵詞：大型光伏電站并網(wǎng)特性及其控制技術(shù)研究　出處：《華北電力大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 大型光伏電站 并網(wǎng)逆變器 多模式控制 光伏輸出特性 MPPT 有功控制 無功及諧波電流補(bǔ)償 電池 超級電容

【摘要】：隨著因化石燃料過度消耗而產(chǎn)生的溫室效應(yīng)成為了全球關(guān)注的焦點(diǎn),我國正在大力推廣利用太陽能等可再生清潔能源的發(fā)電技術(shù)。 本論文首先簡述了光伏發(fā)電的原理,介紹了光伏發(fā)電的優(yōu)勢及發(fā)展方向,闡述了國內(nèi)外光伏發(fā)電技術(shù)及光伏并網(wǎng)技術(shù)的發(fā)展現(xiàn)狀及前景。鑒于光伏發(fā)電出力的隨機(jī)性和不連續(xù)性,最大功率點(diǎn)跟蹤技術(shù)(MPPT)一直都是研究重點(diǎn),隨著光伏發(fā)電技術(shù)的發(fā)展,MPPT也為了滿足新的要求而不斷發(fā)展,以提高系統(tǒng)穩(wěn)定性并且適應(yīng)各種運(yùn)行條件。光伏電站并入電網(wǎng)運(yùn)行會對電網(wǎng)多方面造成影響,例如孤島效應(yīng)、諧波污染問題、無功補(bǔ)償問題,電壓閃變的問題,本文總結(jié)了一些目前用于解決這些問題的方法。逆變器是光伏并網(wǎng)發(fā)電的關(guān)鍵技術(shù),在這方面,本文敘述了并網(wǎng)逆變器的功能,拓?fù)浣Y(jié)構(gòu)的發(fā)展、有待解決的問題以及大型光伏電站并網(wǎng)逆變器的發(fā)展趨勢。 根據(jù)目前發(fā)展形勢可知,光伏發(fā)電的并網(wǎng)化和大型化是將來的主要發(fā)展趨勢,提高光伏發(fā)電效率,增加并網(wǎng)容量,都有助于發(fā)展低碳電網(wǎng)。由于光伏發(fā)電的隨機(jī)性強(qiáng),所以本文通過MATLAB/SIMULNIK建造光伏電站的模型,根據(jù)真實的環(huán)境數(shù)據(jù)得出一年中的典型日的光伏發(fā)電輸出特性曲線,并進(jìn)行了對比分析,隨后還提出了一種大型光伏電站的低碳調(diào)度,也是一種最優(yōu)調(diào)度。 另一方面,隨著光伏電站的容量不斷增加,并網(wǎng)時需要考慮更多的負(fù)面影響,而且還要達(dá)到低碳運(yùn)行的標(biāo)準(zhǔn),這都對并網(wǎng)逆變器提出了許多新的要求,所以本論文設(shè)計出了一種具有MPPT控制、無功及諧波電流補(bǔ)償以及有功控制相結(jié)合的大型光伏電站并網(wǎng)逆變器的多模式控制策略,最后通過MATLAB/SIMULNK建模仿真驗證了該逆變器控制策略的可行性及優(yōu)點(diǎn)。 本文還研究了大型光伏電站集中式并網(wǎng)發(fā)電的情況,應(yīng)用混合型儲能系統(tǒng),使得光伏電站始終向電網(wǎng)輸送穩(wěn)定的電能以進(jìn)行統(tǒng)一調(diào)度,而不是直接向負(fù)荷供電。選用由電池和超級電容組合而成混合型儲能系統(tǒng),并提出合適的控制策略以在提供充足電能的同時維持直流公共環(huán)節(jié)的電壓值。選取兩組連續(xù)的環(huán)境數(shù)據(jù)進(jìn)行建模仿真,仿真結(jié)果驗證了控制策略的正確性,為大型光伏電站并網(wǎng)發(fā)電提供了理論依據(jù)。
[Abstract]:With the greenhouse effect caused by excessive consumption of fossil fuels has become the focus of global attention, China is vigorously promoting the use of solar energy and other renewable clean energy generation technology. In this paper, the principle of photovoltaic power generation is introduced, and the advantages and development direction of photovoltaic power generation are introduced. The development status and prospect of photovoltaic generation technology and photovoltaic grid-connected technology at home and abroad are described. In view of the randomness and discontinuity of photovoltaic power generation, maximum power point tracking technology (MPPTT) has always been the focus of research. With the development of photovoltaic power generation technology, MPPT is also developing to meet the new requirements. In order to improve the stability of the system and adapt to various operating conditions. Photovoltaic power plants incorporated into the grid operation will have many impacts on the grid, such as islanding effect, harmonic pollution, reactive power compensation, voltage flicker. In this paper, some methods used to solve these problems are summarized. Inverter is the key technology of grid-connected photovoltaic power generation. In this respect, the function and topology of grid-connected inverter are described. The problems to be solved and the development trend of grid-connected inverters for large photovoltaic power stations. According to the current development situation, grid-connected and large-scale photovoltaic power generation is the main development trend in the future, improve the efficiency of photovoltaic power generation, increase grid-connected capacity. Because of the strong randomness of photovoltaic power generation, this paper builds the model of photovoltaic power station through MATLAB/SIMULNIK. According to the real environmental data, the output characteristic curves of photovoltaic power generation in typical days of one year are obtained and compared and analyzed. Then, a low carbon scheduling of large photovoltaic power plants is proposed, which is also an optimal scheduling. On the other hand, with the continuous increase of the capacity of photovoltaic power plants, the grid connection needs to consider more negative effects, and also to meet the standards of low-carbon operation, which put forward a lot of new requirements for grid-connected inverters. Therefore, this paper designs a multi-mode control strategy for grid-connected inverter of photovoltaic power station with MPPT control, reactive power and harmonic current compensation and active power control. Finally, the feasibility and advantages of the inverter control strategy are verified by MATLAB/SIMULNK modeling and simulation. This paper also studies the situation of centralized grid-connected power generation in large-scale photovoltaic power plants. The hybrid energy storage system is used to make the photovoltaic power station always transmit stable electric energy to the power grid for unified dispatching. Instead of supplying power directly to the load, a hybrid energy storage system consisting of batteries and super capacitors is chosen. An appropriate control strategy is proposed to maintain the voltage of the DC common link while providing sufficient power. Two groups of continuous environmental data are selected for modeling and simulation. The simulation results verify the correctness of the control strategy. It provides a theoretical basis for grid-connected power generation of large photovoltaic power plants.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM615

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 楊金煥;鄒乾林;談蓓月;葛亮;陳中華;;各國光伏路線圖與光伏發(fā)電的進(jìn)展[J];中國建設(shè)動態(tài).陽光能源;2006年04期

2 查曉明;劉飛;;光伏發(fā)電系統(tǒng)并網(wǎng)控制技術(shù)現(xiàn)狀與發(fā)展(上)[J];變頻器世界;2010年02期

3 楊衛(wèi)東;薛峰;徐泰山;方勇杰;李碧君;;光伏并網(wǎng)發(fā)電系統(tǒng)對電網(wǎng)的影響及相關(guān)需求分析[J];水電自動化與大壩監(jiān)測;2009年04期

4 汪海寧,蘇建徽,張國榮,茆美琴,丁明;光伏并網(wǎng)發(fā)電及無功補(bǔ)償?shù)慕y(tǒng)一控制[J];電工技術(shù)學(xué)報;2005年09期

5 郭小強(qiáng);趙清林;鄔偉揚(yáng);;光伏并網(wǎng)發(fā)電系統(tǒng)孤島檢測技術(shù)[J];電工技術(shù)學(xué)報;2007年04期

6 葉滿園;官二勇;宋平崗;;以電導(dǎo)增量法實現(xiàn)MPPT的單級光伏并網(wǎng)逆變器[J];電力電子技術(shù);2006年02期

7 董密;羅安;;光伏并網(wǎng)發(fā)電系統(tǒng)中逆變器的設(shè)計與控制方法[J];電力系統(tǒng)自動化;2006年20期

8 陳啟鑫;康重慶;夏清;Daniel KIRSCHEN;;低碳電力調(diào)度方式及其決策模型[J];電力系統(tǒng)自動化;2010年12期

9 薛尚青;蔡金錠;;基于二階廣義積分器的基波正負(fù)序分量檢測方法[J];電力自動化設(shè)備;2011年11期

10 康重慶;周天睿;陳啟鑫;葛俊;;電網(wǎng)低碳效益評估模型及其應(yīng)用[J];電網(wǎng)技術(shù);2009年17期

，

本文編號：1432570