【摘要】：三電平逆變器因?yàn)殡妷簯?yīng)力只有兩電平逆變器的一半,并且具有損耗小、諧波含量低的特點(diǎn),所以在風(fēng)能、太陽能等新能源發(fā)電系統(tǒng)中得到了越來越多的應(yīng)用和研究。文中從新能源的功率隨機(jī)波動(dòng)特點(diǎn)出發(fā),首先,評(píng)估了應(yīng)用于新能源系統(tǒng)的傳統(tǒng)三電平逆變器拓?fù)涞膿p耗特點(diǎn),然后,針對(duì)應(yīng)用于光伏發(fā)電系統(tǒng)的三電平并網(wǎng)逆變器提出了硬件和控制策略上的改進(jìn),最后,利用一臺(tái)樣機(jī)驗(yàn)證了所提出的改進(jìn)措施。試驗(yàn)證明,所提改進(jìn)措施能夠有效改善和提高三電平逆變器的效率,尤其是在中低功率范圍內(nèi)的效率。
[Abstract]:Because the voltage stress of three-level inverter is only half of that of two-level inverter, and has the characteristics of low loss and low harmonic content, so it has been more and more applied and researched in new energy generation systems such as wind energy, solar energy and so on. Based on the random fluctuation characteristics of new energy sources, the loss characteristics of the traditional three-level inverter topology applied to new energy systems are evaluated firstly. Then, the loss characteristics of the traditional three-level inverter topology used in the new energy system are evaluated. The hardware and control strategies of the three-level grid-connected inverter used in photovoltaic power generation system are improved. Finally, a prototype is used to verify the proposed improvement measures. The experimental results show that the proposed improvement measures can effectively improve and improve the efficiency of three-level inverter, especially in the range of low and medium power.
【作者單位】： 電力傳輸與功率變換控制教育部重點(diǎn)實(shí)驗(yàn)室(上海交通大學(xué));上海交通大學(xué)密西根學(xué)院;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51177100)~~
【分類號(hào)】：TM464

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