本文選題：風力發(fā)電技術 + 獨立變槳距控制��； 參考：《遼寧工程技術大學》2014年碩士論文

【摘要】：現(xiàn)代工業(yè)的發(fā)展帶來了巨大的能源消耗和嚴重的環(huán)境污染,傳統(tǒng)能源日益萎縮枯竭。為了人類社會的可持續(xù)發(fā)展,當務之急是尋找和研究利用可再生的綠色能源。風力發(fā)電作為可再生能源發(fā)電技術的一種重要形式,在能源供給中的比例正在逐步提高。隨著風力發(fā)電機組的容量不斷提高,風力機的尺寸不斷增加,如何提高輸出功率的穩(wěn)定性、減小風機載荷成為眾多科研院所研究的重點。針對以上問題,本文選用主流的雙饋型變槳距大型風力發(fā)電機設計了三維模糊獨立變槳距控制系統(tǒng),通過MATLAB軟件搭建風力發(fā)電機組的仿真模型驗證該控制方案的合理性,達到了改善風機輸出功率穩(wěn)定性減小載荷的目的。本文首先介紹了風力發(fā)電的發(fā)展和風電技術的發(fā)展,提出變槳控制技術。以風力發(fā)電機組的組成、工作原理、變槳原理和空氣動力學為基礎,研究變槳距風力發(fā)電機組各子系統(tǒng)數(shù)學模型。設計傳統(tǒng)PID控制器和各子系統(tǒng)模型建立統(tǒng)一PID變槳距控制系統(tǒng)的Matlab仿真模型,通過仿真驗證能夠實現(xiàn)風力發(fā)電機組的變槳控制。為減小風機載荷,在確保PID統(tǒng)一變槳距系統(tǒng)可以穩(wěn)定輸出功率的基礎上建立基于槳葉方位角的權系數(shù)分配的PID獨立變槳距系統(tǒng)的Matlab仿真模型。通過與統(tǒng)一變槳距控制方法的仿真結果對比顯示出獨立變槳距在減小槳葉載荷方面的巨大優(yōu)勢。傳統(tǒng)的PID控制對于風力發(fā)電機組這種具有很強的非線性又難以建模的工程問題的控制效果不是很理想,因此本文提出改進的三維模糊控制方案以提高系統(tǒng)的功率控制精度。通過模糊獨立變槳距控制系統(tǒng)與三維模糊獨立變槳距控制系統(tǒng)的仿真對比,表明改進的三維模糊控制方案是可行的。在保證槳葉載荷有所減小的情況下,有效地提高了獨立變槳距控制系統(tǒng)的輸出功率的穩(wěn)定性。仿真證明改進的三維模糊獨立變槳距風力發(fā)電系統(tǒng)達到了提高系統(tǒng)輸出功率穩(wěn)定性和減小風機載荷的目的,為風力發(fā)電機組向更大型化發(fā)展提供了可能性保證了風機的安全運行。
[Abstract]:The development of modern industry has brought huge energy consumption and serious environmental pollution. For the sustainable development of human society, the urgent task is to find and study the use of renewable green energy. Wind power generation as an important form of renewable energy generation technology, the proportion of energy supply is gradually increasing. With the capacity of wind turbine increasing and the size of wind turbine increasing, how to improve the stability of output power and reduce the load of wind turbine has become the focus of many research institutes. In order to solve the above problems, this paper designs a 3D fuzzy independent pitch control system for large wind turbine with variable pitch by using the main type of doubly-fed variable pitch wind turbine. The simulation model of the wind turbine generator set up by MATLAB software verifies the rationality of the control scheme. The output power stability of the fan is improved and the load is reduced. This paper first introduces the development of wind power generation and wind power technology, and puts forward the control technology of variable propeller. Based on the composition, working principle, variable propeller principle and aerodynamics of the wind turbine, the mathematical models of the subsystems of the wind turbine with variable pitch are studied. The traditional pid controller and each subsystem model are designed to establish the Matlab simulation model of the unified pid pitch control system. The simulation results show that the variable propeller control of the wind turbine can be realized. In order to reduce fan load, a Matlab simulation model of pid independent variable pitch system based on weight coefficient allocation of blade azimuth is established on the basis of ensuring that pid uniform variable pitch system can output power stably. Compared with the simulation results of the unified variable pitch control method, it is shown that the independent variable pitch has a great advantage in reducing the blade load. The traditional pid control is not ideal for the wind turbine, which has strong nonlinear and difficult modeling. Therefore, an improved three-dimensional fuzzy control scheme is proposed in this paper to improve the power control accuracy of the system. The simulation results of fuzzy independent pitch control system and three dimensional fuzzy independent pitch control system show that the improved three dimensional fuzzy control scheme is feasible. The stability of the output power of the independent pitch control system is improved effectively under the condition that the blade load is reduced. The simulation results show that the improved three dimensional fuzzy independent pitch wind power generation system can improve the stability of output power and reduce the load of fan. It provides the possibility for the wind turbine to develop to a larger scale and ensures the safe operation of the fan.
【學位授予單位】：遼寧工程技術大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TP273;TM315

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本文編號：2052661