具有分壓電容平衡功能的新型組合九電平逆變器
發(fā)布時(shí)間：2018-05-10 05:15
本文選題：分壓電容平衡 + 混合H橋拓?fù)?/strong> ； 參考：《電工技術(shù)學(xué)報(bào)》2017年S1期
【摘要】：針對傳統(tǒng)多電平逆變器存在電平數(shù)大于3時(shí),分壓電容難以平衡,造成拓?fù)潆娐方Y(jié)構(gòu)復(fù)雜等問題,對擴(kuò)展NP點(diǎn)的混合H橋拓?fù)浜酮?dú)立分壓電容平衡拓?fù)潆娐愤M(jìn)行組合,簡化并得到一種新型九電平逆變器拓?fù)潆娐?針對該拓?fù)潆娐诽岢鱿鄳?yīng)的四載波層疊SPWM策略。通過仿真分析,擴(kuò)展NP點(diǎn)的混合H橋拓?fù)渲虚g兩個(gè)分壓電容電壓值幅度在基準(zhǔn)電壓0V上下波動(dòng),其幅度達(dá)到±25V;而新型九電平逆變器的分壓電容電壓值在期望值100V上下波動(dòng)時(shí),其波動(dòng)幅值小于±5V,因此,從仿真結(jié)果表明新型九電平逆變器拓?fù)浣Y(jié)構(gòu)及調(diào)制策略的應(yīng)用,不僅可降低輸出電壓紋波的幅值,還能達(dá)到分壓電容均衡的效果,并減少了兩個(gè)開關(guān)管的應(yīng)用,降低經(jīng)濟(jì)成本。
[Abstract]:Aiming at the problems of traditional multilevel inverter, such as the voltage number is more than 3, the voltage divider capacitance is difficult to balance, and the topology circuit structure is complex, the hybrid H-bridge topology and the independent voltage capacitor balance topology circuit of extended NP point are combined. A novel nine-level inverter topology circuit is simplified and a four-carrier stacked SPWM strategy is proposed for the topology circuit. Through the simulation analysis, the voltage amplitude of the two voltage dividers in the middle of the hybrid H-bridge topology with extended NP points fluctuates up and down at the reference voltage 0V, and the amplitude reaches 鹵25V, while the voltage value of the new nine-level inverter fluctuates at the expected value of 100V. The fluctuation amplitude is less than 鹵5V. Therefore, the simulation results show that the application of the topology and modulation strategy of the novel nine-level inverter can not only reduce the amplitude of the output voltage ripple, but also achieve the effect of the equalization of the partial voltage capacitance. The application of two switches is reduced and the economic cost is reduced.
【作者單位】： 西華大學(xué)電氣與電子信息學(xué)院;流體及動(dòng)力機(jī)械教育部重點(diǎn)實(shí)驗(yàn)室(西華大學(xué));
【基金】：西華大學(xué)研究生創(chuàng)新基金研究項(xiàng)目(ycjj2016062) 太陽能技術(shù)集成及應(yīng)用推廣四川省高校重點(diǎn)實(shí)驗(yàn)室項(xiàng)目(TYN2015-09) 流體及動(dòng)力機(jī)械教育部重點(diǎn)實(shí)驗(yàn)室研究基金(西華大學(xué)) 攀枝花市科技計(jì)劃項(xiàng)目-太陽能光伏離/并網(wǎng)智能化控制逆變一體集成應(yīng)用(2014CY-S-1-2);攀枝花市科技計(jì)劃項(xiàng)目-光伏發(fā)電系統(tǒng)關(guān)鍵技術(shù)研制(2015 CY-C-5) 四川省電力電子節(jié)能技術(shù)與裝備重點(diǎn)實(shí)驗(yàn)室項(xiàng)目(新型高效無橋高功率因數(shù)變換器的研究-szjj2015-066)資助
【分類號】：TM464
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