【摘要】：太陽能作為一種清潔的可再生資源,其開發(fā)利用受到世界各國(guó)的高度重視。太陽能光伏發(fā)電是太陽能利用的一種有效形式,隨著光伏轉(zhuǎn)換技術(shù)日益成熟,越來越成為世界各國(guó)大力開發(fā)的一種重要的新能源發(fā)電。由于光伏發(fā)電受光照強(qiáng)度、電池板轉(zhuǎn)換效率以及控制技術(shù)等多方面影響,對(duì)于電力系統(tǒng)來說,光伏電源屬于一種不可控的間歇式電源,現(xiàn)有的光伏電源與主電網(wǎng)并聯(lián)的聯(lián)合運(yùn)行方法,較好地解決了光伏電源作為電力系統(tǒng)輔助電源支撐的接入問題,但是會(huì)影響電力系統(tǒng)運(yùn)行的電能質(zhì)量、頻率和電壓穩(wěn)定性。本文為了改進(jìn)光伏電源并聯(lián)接入主電網(wǎng)運(yùn)行的不足,探討了并聯(lián)與串聯(lián)相結(jié)合的光伏電源混聯(lián)接入方式,重點(diǎn)研究了光伏電源三相混聯(lián)接入系統(tǒng)的混成自動(dòng)機(jī)控制方法。論文首先介紹了光伏發(fā)電研究現(xiàn)狀和光伏發(fā)電系統(tǒng)的主要類型,分析了光伏電源接入主電網(wǎng)的接入方式和控制方法。然后,探討了并聯(lián)與串聯(lián)相結(jié)合的光伏電源三相混聯(lián)接入方式,詳細(xì)分析了基于電力電子技術(shù)的光伏電源三相混聯(lián)接入方式的主電路結(jié)構(gòu)；詳細(xì)闡述了混成控制系統(tǒng)及其混成自動(dòng)機(jī)理論的基本原理。在此基礎(chǔ)上,進(jìn)一步分析了光伏電源三相混聯(lián)接入并網(wǎng)系統(tǒng)的混成特性以及其混成自動(dòng)機(jī)理論建模的原理和過程,建立了光伏電源三相混聯(lián)接入并網(wǎng)系統(tǒng)運(yùn)行的混成自動(dòng)機(jī)模型。此后,深入研究了基于混成自動(dòng)機(jī)模型的光伏電源三相混聯(lián)接入并網(wǎng)系統(tǒng)運(yùn)行控制器,對(duì)光伏陣列最大功率跟蹤控制和三相混聯(lián)接入方式的功率接口多功能輸出控制的混成自動(dòng)機(jī)控制方法的原理、算法和實(shí)現(xiàn)進(jìn)行了詳細(xì)研究。最后,運(yùn)用Matlab/Simulink仿真平臺(tái),進(jìn)行了計(jì)算機(jī)仿真,給出了仿真結(jié)果。仿真結(jié)果進(jìn)一步驗(yàn)證了理論分析的正確性。本文研究的光伏電源三相混聯(lián)接入系統(tǒng)的混成自動(dòng)機(jī)控制方法,在實(shí)現(xiàn)并聯(lián)運(yùn)行方式的功能的基礎(chǔ)上,增加了電能質(zhì)量統(tǒng)一控制功能,不僅能夠抑制光伏電源對(duì)主電網(wǎng)的不利影響,而且可以改善主電網(wǎng)的電能質(zhì)量,因此既具有很好的理論研究意義,也有很好的實(shí)際工程應(yīng)用價(jià)值。
[Abstract]:Solar energy as a clean renewable resource, its development and utilization has been attached great importance to the world. Solar photovoltaic power generation is an effective form of solar energy utilization. With the development of photovoltaic conversion technology, it has become an important new energy generation in the world. Photovoltaic power generation is affected by illumination intensity, panel conversion efficiency and control technology. For power system, photovoltaic power supply is an uncontrollable intermittent power supply. The existing joint operation method of photovoltaic power supply and main grid solves the access problem of photovoltaic power supply as auxiliary power source, but it will affect the power quality, frequency and voltage stability of power system. In this paper, in order to improve the shortage of photovoltaic power supply connected in parallel to the main grid, the hybrid access mode of photovoltaic power supply is discussed, and the hybrid automaton control method of the three-phase hybrid access system of photovoltaic power supply is studied. Firstly, this paper introduces the research status of photovoltaic power generation and the main types of photovoltaic power generation system, and analyzes the access mode and control method of photovoltaic power supply to the main grid. Then, the three-phase hybrid access mode of photovoltaic power supply is discussed, and the main circuit structure of three-phase hybrid access mode of photovoltaic power supply based on power electronics technology is analyzed in detail. The basic principle of the hybrid control system and the theory of hybrid automata are described in detail. On this basis, the mixing characteristics of the three-phase hybrid grid-connected photovoltaic power system and the principle and process of the theoretical modeling of the hybrid automaton are further analyzed. A hybrid automaton model of three-phase hybrid access and grid-connected system for photovoltaic power supply is established. After that, the operation controller of three-phase hybrid access and grid-connected system based on hybrid automaton model is studied. The principle, algorithm and implementation of hybrid automata control method for maximum power tracking control of photovoltaic array and power interface multi-function output control of three-phase hybrid access mode are studied in detail. Finally, the computer simulation is carried out using Matlab/Simulink simulation platform, and the simulation results are given. The simulation results further verify the correctness of the theoretical analysis. The hybrid automaton control method of the three-phase hybrid access system of photovoltaic power supply is studied in this paper. On the basis of realizing the function of parallel operation mode, the unified control function of power quality is added. It can not only restrain the adverse effect of photovoltaic power supply on the main grid, but also improve the power quality of the main power grid, so it has good theoretical significance and practical application value.
【學(xué)位授予單位】：長(zhǎng)沙理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM615
，

本文編號(hào)：2357607