电气传动
電氣傳動
전기전동
ELECTRIC DRIVE
2010年
2期
33-36
,共4页
三电平逆变器%空间矢量脉宽调制%中点电位平衡
三電平逆變器%空間矢量脈寬調製%中點電位平衡
삼전평역변기%공간시량맥관조제%중점전위평형
three-level inverter%space vector pulse width modulation(SVPWM)%neutral-point voltage balance
多电平逆变器在中高压大功率场合得到了广泛的研究和应用.研究了二极管钳位型三电平逆变器的拓扑结构和7段式空间矢量SVPWM调制方法.给出了参考矢量所在区域的判断方法,推导工作矢量的作用时间.为解决中点电位平衡问题,提出了一种充分利用冗余电压矢量的中点控制方法.通过仿真验证了所提方法的正确性和有效性.
多電平逆變器在中高壓大功率場閤得到瞭廣汎的研究和應用.研究瞭二極管鉗位型三電平逆變器的拓撲結構和7段式空間矢量SVPWM調製方法.給齣瞭參攷矢量所在區域的判斷方法,推導工作矢量的作用時間.為解決中點電位平衡問題,提齣瞭一種充分利用冗餘電壓矢量的中點控製方法.通過倣真驗證瞭所提方法的正確性和有效性.
다전평역변기재중고압대공솔장합득도료엄범적연구화응용.연구료이겁관겸위형삼전평역변기적탁복결구화7단식공간시량SVPWM조제방법.급출료삼고시량소재구역적판단방법,추도공작시량적작용시간.위해결중점전위평형문제,제출료일충충분이용용여전압시량적중점공제방법.통과방진험증료소제방법적정학성화유효성.
The muhilevel inverter has been studied and widely used in high power applications for medium or high voltage.The structure of the three-level NPC inverter and seven-stage SVPWM modulation was described.Introduced the judging method of which region the reference vector is located,deduced the duty time of each vector.To solve neutral-point voltage balancing problem,a control method fully utilizing redundant voltage vectors was proposed.The validity of proposed method is demonstrated by the simulation results.
