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研究生:賴志豪
研究生(外文):Jhih-Hao Lai
論文名稱:新型太陽能最大功率追蹤法之分析與製作
論文名稱(外文):Analysis and Implementation of New Maximum Power Point Tracking Methods for PV System
指導教授:陳一通陳一通引用關係
指導教授(外文):Yie-Tone Chen
學位類別:碩士
校院名稱:國立雲林科技大學
系所名稱:電機工程系碩士班
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2013
畢業學年度:101
語文別:中文
論文頁數:95
中文關鍵詞:最大功率追蹤法數位訊號處理器單一感測器
外文關鍵詞:maximum power point tracking methodsingle sensordigital signal processor
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  • 被引用被引用:2
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本論文針對太陽能最大功率追蹤提出一系列之追蹤方法。首先,本文應用三點權位法與開路電壓法之混合型最大功率追蹤法,混合兩種追蹤法之優點進行追蹤,改善固定步階之缺點,但此方法需要定時去偵測開路電壓,損失許多功率。接著,本論文提出擁有簡單流程之改良型增量電導法,保留原本增量電導法之判斷式,但將其步階除以二,以達到快速並穩定之追蹤,但是此方法在最大功率點附近時,步階還沒除二,故其責任週期會超出最大功率點之責任週期,損失部分功率。
有鑑於此,本文利用變動步階之概念,藉由增量電導法其判斷式之天生變化趨勢當作步階,不但改善固定步階與上述之問題、保有良好之響應、系統發電效率提升並擁有簡單之追蹤流程。
此外,本文亦提出新型應用單一感測器之太陽能最大功率追蹤法,因為單一
感測器使得整體發電系統之成本下降,本文將其與變動步階法相結合,使追蹤系統擁有單一感測器、良好追蹤響應以及簡單追蹤程式等優點。
最後針對遮蔽情況下之最大功率追蹤,應用前述所提出之自動調變之變動步階法以及單一感測器之自動調變之變動步階法於遮蔽情況,兩者皆可提升全域最大功率點之追蹤速度,且後者之方法更因為使用單一感測器,使得整體系統之成本更為下降。
本文中之數位控制器是採用德州儀器公司所生產的TMS320LF2407A數位訊號處理器來控制完成此系統之數位化(包括類比轉數位之轉換、最大功率追蹤法之演算以及升壓轉換器之開關驅動訊號)。
This thesis proposed a series of new maximum power point tracking methods for PV system. At first, this thesis applies the maximum power point tracking method which is composed of the three-point weight method and fractional open voltage method to eliminate the shortcoming of the fixed step size. This method needs to detect the open voltage at fixed time, and it will result in the loss of the whole PV system. And then, this thesis proposed a novel Incremental Conductance method which reserves the simple judgments of the Incremental Conductance method. When the maximum power point is achieved, the step size has been divided with two continuously until getting the minimum value of the step size. However, the step size starts to be divided when the operating power point exceed the maximum power point. This tracking process will lose some power of the PV system.
In view of these, this thesis takes advantage of the variable step size. We discover the curve of the judgment equations in Incremental Conductance method owns the variable trend, and the variable trend can be used as the step size of the MPPT. The variable step size method eliminates the problems existing in the fixed step size and the above mentioned methods. It also takes the simple flowchart to make performance well.
Furthermore, this thesis also proposed a new maximum power point tracking method with single sensor. Because the single sensor can decline the cost of the whole PV system, so the new method proposed in this paper combines the single sensor method and the variable step size method. This proposed method will own three merits which are the single sensor, good tracking response and simple tracking flowchart.
In the end, this thesis applied the auto-scaling variable step size method and the single-sensor auto-scaling variable step size method to the partial shadow condition. Both methods improve the tracking response of the global maximum power point tracking, and the single-sensor auto-scaling variable step size method will decrease the cost of the whole PV system more.
The digital signal processor used in this paper is the DSP (TMS320LF2407A) produced from the Texas Instrument company. The digital control consists of operations of the analog to digital circuit module, maximum power point algorithm and the pulse width modulation signal.
中文摘要 I
Abstract II
誌謝 IV
第一章 緒論 1
1.1研究背景 1
1.2論文大綱 8
第二章 太陽能發電系統 9
2.1前言 9
2.2太陽能電池等效模型 9
2.2太陽能電池種類 15
第三章 最大功率追蹤技術 16
3.1前言 16
3.2固定步階 17
3.2.1擾動觀察法 17
3.2.2爬坡法 19
3.2.3增量電導法 21
3.2.4開路電壓法 23
3.2.5三點權位法 25
3.2.6本文提出之混合型最大功率追蹤法 27
3.2.7本文提出之改良型增量電導法 28
3.3變動步階 29
3.3.1本文提出之自動調變之變動步階法 31
3.3.2單一感測器法 37
3.3.3本文提出之以單一感測器結合固定步階與變動步階法 39
3.3.4本文提出之以單一感測器結合自動調變之變動步階法 41
3.4遮蔽情況下之追蹤技術 47
3.4.1 本文提出遮蔽情況下之自動調變之變動步階法 53
3.4.2本文提出之遮蔽情況下單一感測器結合自動調變之變動步階法 55
第四章 系統規劃、控制與周邊設計 57
4.1前 言 57
4.2 TMS320LF2407A特性介紹 57
4.3周邊硬體電路設計 59
4.3.1開關驅動電路 59
4.3.2太陽能電池電壓迴授電路 60
4.3.3電流迴授電路 61
4.4軟體規劃 62
第五章 模擬與實驗結果探討與分析 63
5.1前言 63
5.2模擬與實驗架構 63
5.3模擬與實驗結果 64
5.3.1 傳統固定步階之增量電導法(無天氣劇烈變化下) 64
5.3.2 本文提出之混合型最大功率追蹤法 65
5.3.3 本文提出之改良型增量電導法 66
5.3.4 傳統固定步階之增量電導法(天氣變化下) 67
5.3.5 本文提出之單一感測器結合固定步階與變動步階法 70
5.3.6 本文提出之自動調變之變動步階法 72
5.3.7 本文提出之單一感測器結合自動調變之變動步階法 73
5.3.8 本文提出之遮蔽情況下自動調變之變動步階法 75
5.3.9 本文提出之遮蔽情況下單一感測器結合自動調變之變動步階法 76
第六章 結論 77
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