现代电子技术2017，Vol.40Issue(16)：165-169,5.DOI:10.16652/j.issn.1004-373x.2017.16.048
三电平逆变器中点电位平衡的综合控制策略
Integrated control strategy of neutral point potential balance in three-level inverter
摘要
Abstract
Neutral point potential imbalance commonly exists in the three-level inversion circuit.The neutral point potential imbalance is mainly reflected in two aspects:neutral point potential offset and neutral point potential fluctuation.According to the analysis of the cause of the neutral point potential imbalance,an integrated control strategy containing feed-forward control and feed-back control is put forward on the basis of traditional SVPWM algorithm.By collecting the real-time values of two capacitance voltages and three-phase load currents,different control strategies are selected by switching different values of the function,so as to realize the integrated control of the neutral point potential balance.The simulation experiment results show that the control precision of the integrated control strategy is high,the offset of neutral point potential will not occur,and this strategy can control neutral point potential effectively and avoid big voltage fluctuation amplitudes that appear in the strategy with only feed-back control.关键词
三电平逆变器/中点电位/平衡控制/SVPWM算法Key words
three-level inverter/neutral point potential/balance control/SVPWM algorithm分类
信息技术与安全科学引用本文复制引用
曹国锋,王然风,孟润泉..三电平逆变器中点电位平衡的综合控制策略[J].现代电子技术,2017,40(16):165-169,5.基金项目
国家自然科学基金(51274148) （51274148）
