本文選題：Z源逆變器　切入點(diǎn)：開關(guān)電感　出處：《江蘇大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著世界能源短缺以及環(huán)境污染問題的日益嚴(yán)重,越來越多的國家開始注重風(fēng)能、太陽能等新能源的開發(fā)與利用。Z源逆變器作為一種新型逆變器,克服了傳統(tǒng)電壓源逆變器所存在的局限性,在新能源發(fā)電領(lǐng)域有良好的應(yīng)用前景。但是Z源逆變器本身也存在升壓能力不足、輸入電流斷續(xù)、電容電壓應(yīng)力大等問題,改進(jìn)Z源逆變器性能有利于Z源逆變器在新能源發(fā)電領(lǐng)域的推廣與應(yīng)用。本文針對(duì)Z源逆變器存在的問題,對(duì)其拓?fù)浣Y(jié)構(gòu)加以改進(jìn),并對(duì)改進(jìn)后的Z源逆變器展開研究。高升壓能力是Z源逆變器能夠應(yīng)用在低壓輸入場合的重要前提,本文在分析常見Z源逆變器拓?fù)浼吧龎耗芰Φ幕A(chǔ)上,針對(duì)Z源逆變器及其衍生逆變器升壓能力不足的問題,通過級(jí)聯(lián)開關(guān)電感的方法來提升Z源逆變器的升壓能力,在開關(guān)電感Ⅱ型準(zhǔn)Z源逆變器的基礎(chǔ)上進(jìn)行拓?fù)涓倪M(jìn),提出增強(qiáng)Ⅰ/Ⅱ型準(zhǔn)Z源逆變器。與開關(guān)電感Ⅱ型準(zhǔn)Z源逆變器相比,增強(qiáng)Ⅰ/Ⅱ型準(zhǔn)Z源逆變器在相同直通占空比的情況下,直流鏈電壓更高,能有效的提高逆變器的升壓能力。同時(shí),鑒于在相同器件數(shù)量的基礎(chǔ)上,增強(qiáng)Ⅱ型準(zhǔn)Z源拓?fù)湓谔岣吣孀兤魃龎阂蜃臃矫娓袃?yōu)勢(shì),所以選取增強(qiáng)Ⅱ型準(zhǔn)Z源逆變器作為本文后續(xù)重點(diǎn)研究的“增強(qiáng)型準(zhǔn)Z源逆變器”。隨后本文對(duì)增強(qiáng)型準(zhǔn)Z源逆變器的器件特性進(jìn)行分析,指出在相同升壓因子下,增強(qiáng)型準(zhǔn)Z源逆變器在電容電壓應(yīng)力、電感電流紋波方面的優(yōu)勢(shì),通過仿真驗(yàn)證理論分析的正確性。最后,本文給出增強(qiáng)型準(zhǔn)Z源逆變器的主電路和控制電路的設(shè)計(jì)方案,介紹控制軟件的設(shè)計(jì)流程,搭建增強(qiáng)型準(zhǔn)Z源逆變器的實(shí)驗(yàn)平臺(tái)。實(shí)驗(yàn)結(jié)果驗(yàn)證了本文所提出的增強(qiáng)型準(zhǔn)Z源逆變器的可行性和優(yōu)越性。
[Abstract]:With the increasing shortage of energy and environmental pollution in the world, more and more countries begin to pay attention to the development and utilization of new energy sources, such as wind energy and solar energy, as a new type of inverter. It overcomes the limitation of the traditional voltage source inverter and has a good application prospect in the field of new energy generation. However, the Z-source inverter itself also has some problems, such as insufficient boost capacity, intermittent input current, large capacitance voltage stress, and so on. Improving the performance of Z-source inverter is beneficial to the popularization and application of Z-source inverter in the field of new energy generation. And the improved Z-source inverter is studied. The high voltage boost capability is an important prerequisite for Z-source inverter to be used in low-voltage input field. This paper analyzes the common Z-source inverter topology and boost capacity. Aiming at the problem of insufficient boost capacity of Z-source inverter and its derived inverter, the boost capacity of Z-source inverter is enhanced by cascaded switching inductance, and topology improvement is carried out on the basis of switched inductance type 鈪，

本文編號(hào)：1614738