【摘要】：為降低機(jī)電類(lèi)負(fù)載共模電壓,對(duì)多電平變流器零序電壓優(yōu)化控制算法進(jìn)行了研究。首先,采用了一種將經(jīng)典αβ坐標(biāo)系中的α和β坐標(biāo)值分別拉伸為原值的3和3倍的新型mn坐標(biāo)系,推導(dǎo)了多電平空間矢量脈寬調(diào)制(SVPWM)在這種新型坐標(biāo)系中的實(shí)現(xiàn)方法;其次,根據(jù)引入的零序電壓約束條件,推導(dǎo)了多電平電路輸出狀態(tài)。實(shí)驗(yàn)結(jié)果表明,在mn坐標(biāo)系中,所有基本矢量的坐標(biāo)為整數(shù),零序電壓優(yōu)化控制算法能確保零序電壓的值在-E/3、0和E/3之間來(lái)回切換(E為單級(jí)電平),且該算法與多電平的電平數(shù)無(wú)關(guān)。
[Abstract]:In order to reduce the common mode voltage of electromechanical load, the zero sequence voltage optimal control algorithm of multilevel converter is studied. Firstly, a new type of mn coordinate system is adopted, in which the 偽 and 尾 coordinate values in the classical 偽 尾 coordinate system are stretched to 3 and 3 times the original value, respectively, and the realization method of multilevel space vector pulse width modulation (SVPWM) in this new coordinate system is deduced. Secondly, the output state of multilevel circuit is deduced according to the zero sequence voltage constraint. The experimental results show that in the mn coordinate system, the coordinates of all basic vectors are integers, and the zero sequence voltage optimization control algorithm can ensure that the zero sequence voltage is switched back and forth between -E / 3 0 and E / 3 (E is a single level). The algorithm is independent of the number of multilevel levels.
【作者單位】： 廣東工業(yè)大學(xué)自動(dòng)化學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(51207026;51307025) 廣東省自然科學(xué)基金(2015A030313487)~~
【分類(lèi)號(hào)】：TM46

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