本文選題：微電網(wǎng) + 多電壓等級��； 參考：《沈陽農(nóng)業(yè)大學(xué)》2017年碩士論文

【摘要】：微電網(wǎng)技術(shù)是一個備受世界各國電力工作者關(guān)注的技術(shù),它從被提出至今不到二十年的時間里已經(jīng)取得了許多突破。微電網(wǎng)技術(shù)之所以備受關(guān)注的原因在于它是解決零散的分布式電源利用的有效途徑,此外微電網(wǎng)還能提高電能質(zhì)量和供電可靠性。當(dāng)今的世界正面臨著前所未有的機遇與挑戰(zhàn),這種機遇和挑戰(zhàn)是由高速發(fā)展的社會生產(chǎn)力和即將面臨枯竭的傳統(tǒng)能源造成的。在這樣的背景下,微電網(wǎng)技術(shù)的優(yōu)點既能夠配合生產(chǎn)力發(fā)展過程中對能量供應(yīng)的需求,又能夠充分利用清潔可再生的新能源,對社會的發(fā)展有重要的意義。本文設(shè)計了一種交直流混合微電網(wǎng),并對系統(tǒng)進行了仿真分析。首先設(shè)計了混合微電網(wǎng)的結(jié)構(gòu)。其主要的結(jié)構(gòu)特點是微電網(wǎng)內(nèi)部有三條母線:800V直流母線、48V直流母線和380V(線電壓)交流母線,分布式電源、直流負(fù)荷和交流負(fù)荷分別接在三條不同的母線上。這種結(jié)構(gòu)使微電網(wǎng)內(nèi)不同母線上的電氣設(shè)備相互隔離,一條母線上的電氣參數(shù)發(fā)生變化,對其他兩條母線上的電氣裝置影響很小,從而提高了微電網(wǎng)的供電可靠性和電能質(zhì)量。其次,根據(jù)微電網(wǎng)結(jié)構(gòu)和控制標(biāo)準(zhǔn)制定了多電壓等級交直流混合微電網(wǎng)的控制策略。根據(jù)系統(tǒng)拓?fù)?微電網(wǎng)控制策略的關(guān)鍵是微電網(wǎng)中儲能元件的控制策略。根據(jù)微電網(wǎng)并網(wǎng)運行和孤島運行兩種穩(wěn)定的運行狀態(tài),儲能單元的控制方式也將發(fā)生變化,從而達到微電網(wǎng)的控制目標(biāo)。最終,在MATLAB/simulink軟件中建立了多電壓等級交直流混合微電網(wǎng)的仿真模型。并分別為其兩種穩(wěn)定運行狀態(tài)進行了仿真分析。其中并網(wǎng)運行考慮了兩種情況:一是微電網(wǎng)突然接入風(fēng)機;二是微網(wǎng)中負(fù)荷突然發(fā)生改變。通過仿真驗證了設(shè)計的微電網(wǎng)的性能。本文的研究是對微電網(wǎng)技術(shù)應(yīng)用方式的一種探討,主要側(cè)重點在于討論微電網(wǎng)的結(jié)構(gòu)和控制策略。通過研究驗證了多母線的網(wǎng)架結(jié)構(gòu)具有很好的電氣隔離效果,能夠提高微電網(wǎng)的電能質(zhì)量和供電可靠性。綜上所述,多電壓等級的交直流混合微電網(wǎng)能夠吸納分布式電源,提高電能質(zhì)量和供電可靠性;微電網(wǎng)能夠向交流負(fù)荷和直流負(fù)荷供應(yīng)電能,適用范圍廣泛;網(wǎng)架拓?fù)浜唵?控制靈活,是比較理想的微電網(wǎng)拓?fù)洹?br/>[Abstract]:Microgrid technology is a technology that has attracted the attention of power workers all over the world. It has made many breakthroughs in less than 20 years since it was proposed. The reason why microgrid technology has attracted much attention is that it is an effective way to solve the problem of distributed power generation. In addition, microgrid can also improve the power quality and reliability of power supply. Today's world is facing unprecedented opportunities and challenges, which are caused by the rapid development of social productivity and the depletion of traditional energy. In this context, the advantages of microgrid technology can not only meet the demand for energy supply in the process of productivity development, but also make full use of clean and renewable new energy, which is of great significance to the development of society. In this paper, a hybrid AC / DC microgrid is designed, and the system is simulated and analyzed. Firstly, the structure of hybrid microgrid is designed. The main structural features are that there are three busbars: 800V DC busbar 48V DC bus and 380V AC bus inside the microgrid. Distributed power supply DC load and AC load are connected to three different busbars respectively. This kind of structure makes the electrical equipment on the different bus in the microgrid separate from each other, and the electrical parameters on one bus change, which has little influence on the other two busbars, thus improving the power supply reliability and power quality of the microgrid. Secondly, according to the structure and control standard of microgrid, the control strategy of multi-voltage AC / DC hybrid microgrid is established. According to the system topology, the key of microgrid control strategy is the control strategy of energy storage element in microgrid. According to the two stable operation states of microgrid grid-connected operation and islanding operation, the control mode of the energy storage unit will also change, so as to achieve the control goal of the micro-grid. Finally, the simulation model of multi-voltage AC / DC hybrid microgrid is established in MATLAB/simulink software. The two stable running states are simulated and analyzed respectively. Two conditions are considered in grid-connected operation: one is the microgrid suddenly connected to the fan, the other is the sudden change of the load in the microgrid. The performance of the designed microgrid is verified by simulation. The research of this paper is a kind of discussion on the application of microgrid technology. The main focus is on the structure and control strategy of microgrid. It is proved that the multi-bus grid structure has good electrical isolation effect and can improve the power quality and reliability of the micro-grid. To sum up, multi-voltage hybrid AC / DC microgrid can absorb distributed generation, improve power quality and power supply reliability; microgrid can supply power to AC load and DC load, which can be used in a wide range of applications; grid topology is simple, Flexible control is an ideal microgrid topology.
【學(xué)位授予單位】：沈陽農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM727;TM743
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本文編號：1916225