本文關鍵詞：獨立光伏發(fā)電系統(tǒng)中蓄能研究與設計　出處：《安徽理工大學》2017年碩士論文　論文類型：學位論文

  更多相關文章： MPPT 蓄電池 充電方式 光伏陣列 防雷 容量

【摘要】：太陽能作為綠色新型的能源,已經(jīng)受到世界各國的關注。其中光伏發(fā)電是太陽能使用最為廣泛的一種方式,具有非常良好的前景,成為目前研究的重點之一。獨立光伏發(fā)電系統(tǒng),作為光伏發(fā)電的一種方式,已經(jīng)被很多人接受并使用。而在獨立光伏發(fā)電系統(tǒng)中快速尋找到最大功率點并且能夠保持穩(wěn)定對整個系統(tǒng)的工作效率有很大影響;同時,儲能設備作為獨立光伏發(fā)電系統(tǒng)的重要組成部分,其使用時間的長短以及充電方式的合理性對系統(tǒng)的經(jīng)濟性、實用性也有很大影響。并且用戶在搭建系統(tǒng)時,蓄電池和光伏陣列容量的合理匹配可以在很大程度減少經(jīng)濟成本,此外在對獨立光伏發(fā)電系統(tǒng)的日常使用中,對其進行有效的防雷保護也可以很大程度上減少經(jīng)濟損失。因此對獨立光伏發(fā)電中MPPT、儲能設備的充電方式以及容量計算和系統(tǒng)防雷措施的研究具有十分重要的意義。本文首先介紹了國內外光伏發(fā)電以及儲能技術的現(xiàn)狀以及對獨立光伏發(fā)電系統(tǒng)框架進行分析,并且對光伏電池特性進行分析研究,在根據(jù)其原理,利用仿真軟件,搭建出仿真模型,通過輸出波形證明其特性。再對幾種經(jīng)典的最大功率跟蹤法進行分析比較,并且使用MATLAB仿真軟件進行仿真驗證,進行波形比較,分析其各自的優(yōu)劣性。最后提出一種優(yōu)化的MPPT算法,并仿真后得出波形與之前的算法波形進行分析比較,驗證其優(yōu)點。其次為提高獨立光伏發(fā)電系統(tǒng)中蓄電池的使用壽命和充電效率,提出幾種充電方式,并分析比較,在原有的三段式充電方式上進行優(yōu)化,將MPPT最大功率跟蹤法和階段式充電法相結合使用,并在原有的三段式基礎上,增加為四段式充電方式,并且提出一套充電策略。在MATLAB仿真軟件上,進行仿真模型搭建,仿真結果證明其策略可以有效的提高蓄電池的充放電方式的效率。最后,本文就獨立太陽能光伏發(fā)電系統(tǒng)提出一套工程設計,包括光伏陣列和蓄電池的容量設計方法、并在原有的基礎上,提出一套容量優(yōu)化設計方案,有效減少了搭建獨立光伏系統(tǒng)的經(jīng)濟成本。同時,在設計防雷技術上時,在原本的外部防雷技術上增加法拉第籠,可以有效的抵御電磁脈沖作用,提高了防雷效果。并設計了三級內部防雷措施,以及對接地電阻的選擇。
[Abstract]:Solar energy, as a new green energy, has been concerned by the world. Photovoltaic power generation is the most widely used way of solar energy, and has a very good prospect. Independent photovoltaic power generation system, as a way of photovoltaic power generation, has become one of the key research areas. It has been accepted and used by many people, and finding the maximum power point in the independent photovoltaic power generation system quickly and maintaining stability has a great impact on the efficiency of the whole system. At the same time, energy storage equipment as an important part of the independent photovoltaic power generation system, the length of its use time and the rationality of the charging mode of the system economy. The practicability also has a great influence. And the reasonable matching of battery and photovoltaic array capacity can greatly reduce the economic cost when users build the system, in addition to the daily use of independent photovoltaic power system. Effective lightning protection can also reduce the economic losses to a large extent. Therefore, the MPPT in independent photovoltaic power generation. It is of great significance to study the charging mode, capacity calculation and lightning protection measures of energy storage equipment. Firstly, this paper introduces the current situation of photovoltaic power generation and energy storage technology at home and abroad and its frame for independent photovoltaic power generation system. Frame for analysis. And the characteristics of photovoltaic cells are analyzed and studied. According to the principle of photovoltaic cells, the simulation model is built by using simulation software. Through the output waveform to prove its characteristics. Then several classical maximum power tracking methods are analyzed and compared, and the MATLAB simulation software is used to verify the waveform comparison. Finally, an optimized MPPT algorithm is proposed, and the simulation results show that the waveform is compared with that of the previous algorithm. Verify its advantages. Secondly, in order to improve the battery life and charging efficiency in the independent photovoltaic power system, several charging methods are proposed and compared, and the original three-stage charging mode is optimized. The MPPT maximum power tracking method is used in combination with the stage charging method, and on the basis of the original three-stage charging method, it is added to the four-stage charging mode. And put forward a set of charging strategy. In the MATLAB simulation software, the simulation model is built, the simulation results show that the strategy can effectively improve the efficiency of battery charging and discharging. Finally. This paper presents a set of engineering design for independent solar photovoltaic system, including the capacity design method of photovoltaic array and battery, and on the basis of the original, puts forward a set of capacity optimization design scheme. At the same time, in the design of lightning protection technology, in the original external lightning protection technology to increase Faraday cage, can effectively resist electromagnetic pulse action. The lightning protection effect is improved, and three-stage internal lightning protection measures are designed, as well as the selection of grounding resistance.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM615

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