【摘要】：風電技術(shù)由于其優(yōu)越的環(huán)保性能和相對較低的成本,近年來發(fā)展迅速,并在發(fā)電規(guī)模和技術(shù)研發(fā)上都取得了長足的發(fā)展,按照目前的發(fā)展趨勢,根據(jù)有關(guān)專家預測在不足十年的時間內(nèi)將成為火力和水利發(fā)電之后的第三大能源系統(tǒng)。由于其所具有的以上優(yōu)點和迅猛的發(fā)展勢頭使其成為目前世界發(fā)電領(lǐng)域的研究熱點。本文通過參考大量有關(guān)風力發(fā)電技術(shù)的國內(nèi)外文獻,對雙饋風力發(fā)電機的系統(tǒng)建模,勵磁控制優(yōu)化進行了深入研究。分析研究了風力機的運行原理和數(shù)學模型,推導出了簡化數(shù)學模型,并依此為基礎(chǔ)開展了矢量控制方式的相關(guān)研究。建立了PWM電壓型變流器的仿真模型網(wǎng)側(cè)變流器的數(shù)學模型、轉(zhuǎn)子側(cè)變流器的數(shù)學模型。本文分析了風力機特性和功率特性,提出了一種不依賴于風速測量來實現(xiàn)雙饋風力發(fā)電系統(tǒng)最大功率點追蹤(MPPT)控制的策略,使追蹤與捕獲最大風能成為可能。建立了變速恒頻雙饋風力發(fā)電仿真模型,并網(wǎng)仿真模型,短路故障仿真模型,提出一種基于結(jié)合模糊邏輯與滑模變結(jié)構(gòu)技術(shù)的新型風電系統(tǒng)魯棒控制方法,并進行了滑模面及控制律設(shè)計,在Matlab/Simulink仿真平臺上對系統(tǒng)進行仿真分析,驗證文中所研究方法的正確性。本文的研究對于推廣綠色能源技術(shù)、節(jié)能減排具有重要理論及實際意義。
[Abstract]:Wind power technology has developed rapidly in recent years because of its superior environmental performance and relatively low cost, and has made great progress in power generation scale and technology research and development, according to the current development trend. Experts predict it will be the third largest energy system after thermal and hydroelectric power generation in less than a decade. Because of its advantages and rapid development, it has become a research hotspot in the field of power generation in the world. In this paper, the system modeling and excitation control optimization of doubly-fed wind turbine are studied by referring to a large number of domestic and foreign literatures on wind power generation technology. The operating principle and mathematical model of the wind turbine are analyzed and the simplified mathematical model is derived. Based on this the related research of vector control mode is carried out. The simulation model of PWM voltage source converter the mathematical model of grid-side converter and the mathematical model of rotor side converter are established. In this paper, the characteristics and power characteristics of wind turbine are analyzed, and a strategy of maximum power point tracing (MPPT) control for doubly-fed wind power generation system is proposed, which is independent of wind speed measurement, which makes it possible to track and capture the most windy wind. The simulation model of variable speed constant frequency doubly-fed wind power generation, grid-connected simulation model and short-circuit fault simulation model are established. A new robust control method for wind power system based on fuzzy logic and sliding mode variable structure technology is proposed. The sliding-mode surface and control law are designed, and the simulation analysis of the system is carried out on Matlab / Simulink simulation platform, which verifies the correctness of the method studied in this paper. The research in this paper has important theoretical and practical significance for promoting green energy technology and energy saving and emission reduction.
【學位授予單位】：遼寧工程技術(shù)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM614

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