本文選題：大型光伏電站 + 能量管理　； 參考：《華北電力大學(北京)》2017年碩士論文

【摘要】：能源是經(jīng)濟發(fā)展的動力之源,中國一直以來就是能源消耗大國,為了減緩化石能源的消耗,太陽能、風能等新能源的開發(fā)得到了越來越多的重視。光伏發(fā)電作為一種高效清潔的可再生能源發(fā)電技術,成為近年來發(fā)展速度最快的新型發(fā)電產(chǎn)業(yè)之一。隨著光伏發(fā)電技術的不斷提高和建設成本的逐漸降低,各地出現(xiàn)諸多大型光伏電站。光伏發(fā)電的輸出功率受環(huán)境因素影響具有間歇性、波動性和隨機性等特點,這使得光伏電站的控制穩(wěn)定性和快速調節(jié)能力差,大規(guī)模光伏發(fā)電接入電網(wǎng)會造成電網(wǎng)功率不平衡和并網(wǎng)點電壓波動等危害。光伏電站的功率控制技術即能量管理系統(tǒng)對于大型光伏電站起著非常重要的作用,是目前提高大型光伏電站的并網(wǎng)電能質量,增強大型光伏電站并網(wǎng)可靠性,實現(xiàn)并網(wǎng)友好型電站,促進光伏發(fā)電真正成為未來城市電網(wǎng)優(yōu)質電源亟待解決的問題。本文首先在分析光伏電池基本工作原理的基礎上利用MATLAB/Simulink平臺搭建光伏組件仿真模型,得到光伏組件的輸出特性曲線,并采用擾動觀察法通過控制Boost電路的占空比實現(xiàn)光伏陣列的最大功率追蹤。然后根據(jù)三相并網(wǎng)逆變器的電路結構推導出其數(shù)學模型,按電網(wǎng)電壓定向的矢量控制方法設計并網(wǎng)逆變器的有功功率和無功功率的解耦控制并進行仿真驗證。最后以大型光伏電站為研究背景,詳細分析大型光伏電站的實際模型,對光伏并網(wǎng)逆變器的無功輸出能力以及并網(wǎng)點電壓影響因素進行研究,分析光伏電站內部電壓分布不平衡的原因,提出一種并網(wǎng)逆變器與光伏電站其他無功補償裝置協(xié)調控制策略,通過求解多目標優(yōu)化模型得到大型光伏電站的無功分配優(yōu)化控制方案
[Abstract]:Energy is the driving force of economic development. China has always been a big energy consuming country. In order to slow down the consumption of fossil energy, the development of new energy, such as solar energy, wind energy and so on, has been paid more and more attention. Photovoltaic power generation, as an efficient and clean renewable energy generation technology, has become one of the fastest growing new generation industries in recent years. With the continuous improvement of photovoltaic power generation technology and the gradual reduction of construction costs, there are many large photovoltaic power stations. The output power of photovoltaic power generation is affected by environmental factors, which has the characteristics of intermittent, volatility and randomness, which makes the control stability and fast regulation ability of photovoltaic power station poor. Large-scale photovoltaic power generation will cause power imbalance and voltage fluctuation. The power control technology of photovoltaic power station, that is, energy management system, plays a very important role in large-scale photovoltaic power station, which is to improve the grid-connected power quality of large-scale photovoltaic power station and enhance the reliability of grid-connected photovoltaic power station. The realization of grid-friendly power station and the promotion of photovoltaic power generation really become the problem of high quality power supply in future urban power grid. Firstly, based on the analysis of the basic working principle of photovoltaic cell, the simulation model of photovoltaic module is built by using MATLAB/Simulink platform, and the output characteristic curve of photovoltaic module is obtained. The maximum power tracking of photovoltaic array is realized by controlling the duty cycle of Boost circuit by perturbation observation method. Then, according to the circuit structure of three-phase grid-connected inverter, the mathematical model is deduced, and the decoupling control of active and reactive power of grid-connected inverter is designed and verified by simulation. Finally, taking the large-scale photovoltaic power station as the research background, the actual model of the large-scale photovoltaic power station is analyzed in detail, and the reactive power output ability of the photovoltaic grid-connected inverter and the influence factors of the parallel dot voltage are studied. Based on the analysis of the unbalanced voltage distribution in photovoltaic power plants, a coordinated control strategy between grid-connected inverters and other reactive power compensators in photovoltaic power plants is proposed. Optimal reactive power distribution control scheme for large photovoltaic power plants by solving multi-objective optimization model
【學位授予單位】：華北電力大學(北京)
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM615

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本文編號：1934058