【摘要】：塔式太陽能熱發(fā)電系統(tǒng)以其清潔性、發(fā)電質(zhì)量穩(wěn)定等優(yōu)點成為太陽能利用領(lǐng)域的重要發(fā)展方向,定日鏡作為塔式發(fā)電系統(tǒng)的主要組成部分,完成對太陽光能的聚集工作,其聚光過程的精度與穩(wěn)定性對電站的發(fā)電功率及電站設(shè)備的安全具有重要意義,是塔式系統(tǒng)中的一個重要研究方向。本文主要以定日鏡的開環(huán)控制系統(tǒng)為研究對象,從定日鏡的聚光過程、光斑中心點與聚光目標(biāo)點的偏差測量、光斑中心偏差數(shù)據(jù)處理等方面進(jìn)行設(shè)計,實現(xiàn)定日鏡在校正下的光斑偏差處理過程。本文的研究重點和創(chuàng)新成果有以下幾點:(1)研究定日鏡開環(huán)控制系統(tǒng)中的聚光過程,分析太陽位置計算與定日鏡實時聚光過程分離的控制策略。(2)使用由相機(jī)、白板與圖像處理算法組成的光斑偏差測量系統(tǒng),實現(xiàn)對定日鏡反射到白板上光斑偏離白板中心點的偏差值的計算,并結(jié)合實際狀況中的相機(jī)抖動問題,設(shè)計了一套實用的定日鏡光斑偏差自動計算系統(tǒng)。(3)針對定日鏡在校正狀態(tài)下一天中獲取的光斑偏差數(shù)據(jù)所具有的稀疏性與噪聲問題,設(shè)計了改進(jìn)的極限學(xué)習(xí)機(jī)算法(ELM),實現(xiàn)對定日鏡光斑偏差數(shù)據(jù)的有效擬合,獲得較為可靠的光斑偏差變化曲線。(4)基于以上研究內(nèi)容,設(shè)計了一套自動的定日鏡光斑偏差處理系統(tǒng),實現(xiàn)定日鏡校正狀態(tài)下光斑圖像向光斑偏差變化曲線的轉(zhuǎn)換,最終對該系統(tǒng)進(jìn)行仿真驗證。本文工作實現(xiàn)定日鏡光斑偏差處理系統(tǒng)的設(shè)計,經(jīng)驗證能較好得到定日鏡的光斑偏差變化規(guī)律,對定日鏡轉(zhuǎn)軸在聚光過程中的角度偏差計算具有重要意義。
[Abstract]:Tower solar thermal power generation system has become an important development direction in the field of solar energy utilization because of its advantages of cleanliness and stable quality of power generation. As the main component of tower power generation system, the solar thermal power generation system accomplishes the gathering of solar light energy. The accuracy and stability of the process of concentrating light is of great significance to the power generation of power station and the safety of power station equipment. It is an important research direction in tower system. In this paper, the open-loop control system of the sun-fixing mirror is taken as the research object. It is designed from the aspects of the focusing process of the sunspot, the measurement of the deviation between the spot center and the focus point, the data processing of the spot center deviation, etc. The processing process of spot deviation under correction of sunspot mirror is realized. The key points and innovative achievements of this paper are as follows: (1) the focusing process in the open loop control system of the helioscope is studied, and the control strategy for the separation of the solar position calculation from the real-time focusing process of the sunspot mirror is analyzed. (2) the camera is used. The measurement system of spot deviation, which is composed of whiteboard and image processing algorithm, can calculate the deviation value of spot deviation from the center point of whiteboard reflected by the sun-fixing mirror, and combine with the camera jitter problem in the actual situation. A set of practical automatic calculation system for spot deviation of sunspot mirror is designed. (3) aiming at the problem of sparsity and noise of spot deviation data obtained from sunspot mirror in correction state one day, The improved extreme learning machine (ELM),) algorithm is designed to effectively fit the spot deviation data of the helioscope, and a reliable curve of spot deviation is obtained. (4) based on the above research, a set of automatic processing system for spot deviation of sunspot mirror is designed. The transformation from spot image to spot deviation curve is realized in the state of sunspot correction. Finally, the system is simulated and verified. In this paper, the design of the spot deviation processing system for sun-fixing mirror is realized. It is proved that the variation law of spot deviation of sunspot mirror can be well obtained, which is of great significance to the calculation of angle deviation of the turning axis of sun-fixing mirror in the process of concentrating light.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM615

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