發(fā)布時(shí)間：2018-03-21 05:30

  本文選題：微網(wǎng)　切入點(diǎn)：逆變電源　出處：《浙江工業(yè)大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：由于傳統(tǒng)能源面臨著嚴(yán)重的環(huán)境污染和能源危機(jī),基于太陽能、風(fēng)能等可再生能源的分布式發(fā)電技術(shù)受到了人們?cè)絹碓蕉嗟难芯?而大量分散的分布式發(fā)電單元的多點(diǎn)接入對(duì)大電網(wǎng)帶來了很大的負(fù)面影響,于是微網(wǎng)控制技術(shù)應(yīng)運(yùn)而生,微網(wǎng)將微電源和負(fù)荷連接起來,形成一個(gè)可控的、能獨(dú)立孤島運(yùn)行和并網(wǎng)運(yùn)行的微型電網(wǎng),微網(wǎng)代表者電力系統(tǒng)的新的發(fā)展方向,是當(dāng)前研究的熱點(diǎn)。本文主要研究了微網(wǎng)逆變電源的控制策略,借鑒同步發(fā)電機(jī)的控制思想對(duì)逆變電源進(jìn)行控制,使得逆變器模擬了同步發(fā)電機(jī)的大慣性、高輸出阻抗、帶負(fù)載能力強(qiáng)的特點(diǎn)。主要內(nèi)容如下：(1)對(duì)微網(wǎng)的研究背景、國(guó)內(nèi)外研究現(xiàn)狀進(jìn)行了概括性地闡述。(2)分析了微網(wǎng)現(xiàn)有的逆變電源控制策略,分別介紹了微源的下垂控制、PQ控制、V/f控制,指出了微網(wǎng)在不同的運(yùn)行模式下逆變電源應(yīng)采用不同的控制策略,分析對(duì)比逆變器與同步發(fā)電機(jī)的特性,在此基礎(chǔ)上提出了基于虛擬同步發(fā)電機(jī)思想的控制策略。(3)對(duì)同步發(fā)電機(jī)進(jìn)行數(shù)學(xué)建模,并把推導(dǎo)出的同步發(fā)電機(jī)的模型作為逆變器虛擬同步發(fā)電機(jī)算法的數(shù)學(xué)模型,給出了虛擬同步發(fā)電機(jī)算法的具體實(shí)現(xiàn)；分析了逆變器虛擬同步發(fā)電機(jī)的主電路以及各主要變量之間的關(guān)系,給出了主電路的等效控制結(jié)構(gòu)框圖；并詳細(xì)的分析了采用虛擬同步發(fā)電機(jī)算法之后逆變器的等效輸出阻抗。(4)借鑒傳統(tǒng)電力系統(tǒng)中同步發(fā)電機(jī)的調(diào)速器和勵(lì)磁控制器的工作原理,設(shè)計(jì)了逆變器的功頻調(diào)節(jié)器和電壓調(diào)節(jié)器,給出了逆變器控制系統(tǒng)的整體結(jié)構(gòu)。(5)在MATLAB/Simulink環(huán)境下搭建了微網(wǎng)仿真模型,對(duì)逆變電源獨(dú)立帶載以及投切負(fù)載運(yùn)行的輸出特性進(jìn)行了仿真,并重點(diǎn)分析了關(guān)鍵參數(shù)的改變對(duì)輸出特性的影響。仿真結(jié)果驗(yàn)證了虛擬同步發(fā)電機(jī)思想的正確性以及操作的可行性。
[Abstract]:Because traditional energy is facing serious environmental pollution and energy crisis, distributed power generation technology based on solar, wind and other renewable energy has been more and more studied. But the multi-point connection of a large number of distributed generation units has a great negative impact on the large power grid, so the micro-grid control technology emerges as the times require, and the micro-grid connects the micro-power source and the load to form a controllable one. Micro-grid, which can operate independently and grid-connected, represents a new direction of development of power system, which is the focus of current research. In this paper, the control strategy of micro-grid inverter power supply is mainly studied. The inverter simulates the characteristics of large inertia, high output impedance and strong load capacity of synchronous generator. The main contents are as follows: 1) the research background of microgrid. The current research situation at home and abroad is summarized. (2) the control strategy of microgrid inverter power supply is analyzed, and the droop control of microsource PQ control is introduced, and the V / F control is introduced. It is pointed out that different control strategies should be adopted for the inverter power supply in different operation modes of microgrid, and the characteristics of inverter and synchronous generator are analyzed and compared. On this basis, a control strategy based on the idea of virtual synchronous generator is proposed to model the synchronous generator, and the derived model of the synchronous generator is regarded as the mathematical model of the algorithm of the inverter virtual synchronous generator. The realization of the algorithm of the virtual synchronous generator is given, the main circuit of the inverter virtual synchronous generator and the relationship between the main variables are analyzed, and the equivalent control structure block diagram of the main circuit is given. The equivalent output impedance of inverter using virtual synchronous generator algorithm is analyzed in detail. (4) the working principle of governor and excitation controller of synchronous generator in traditional power system is used for reference. The power frequency regulator and voltage regulator of the inverter are designed. The overall structure of the inverter control system is given. (5) the simulation model of the microgrid is built under the environment of MATLAB/Simulink. The output characteristics of independent load and switching load operation of inverter power supply are simulated. The influence of the key parameters on the output characteristics is analyzed, and the simulation results verify the correctness of the idea of virtual synchronous generator and the feasibility of operation.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM464

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 魯宗相;王彩霞;閔勇;周雙喜;呂金祥;王云波;;微電網(wǎng)研究綜述[J];電力系統(tǒng)自動(dòng)化;2007年19期

2 王成山;肖朝霞;王守相;;微網(wǎng)綜合控制與分析[J];電力系統(tǒng)自動(dòng)化;2008年07期

3 蘇玲;張建華;王利;苗唯時(shí);吳子平;;微電網(wǎng)相關(guān)問題及技術(shù)研究[J];電力系統(tǒng)保護(hù)與控制;2010年19期

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本文編號(hào)：1642458