| 中点箝位型三电平逆变器控制方法的综合研究 |
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| 引用本文： | 周文生,姚钢,宋文祥. 中点箝位型三电平逆变器控制方法的综合研究[J]. 电气传动自动化, 2008, 30(2): 6-9,15 |
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| 作者姓名： | 周文生 姚钢 宋文祥 |
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| 作者单位： | 平煤集团,飞行化工有限公司,河南,平顶山,467001;上海交通大学,电气工程系,上海,200030 |
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| 摘 要： | 深入研究了空间矢量调制模式下的三电平逆变器中点电压波动的机理,建立了平均中点电流数学模型,为中点电压平衡控制提供了理论依据,并提出基于电压中矢量合成的中点电压平衡控制方法,该方法对于系统动态过程中出现的电压不平衡,可以通过调整冗余小矢量的相对作用时间进行补偿,由于电压中矢量的部分作用时间被均分给相应的小矢量,因此其补偿效果明显。实验结果证实了本研究方法的正确性。
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| 关 键 词： | 三电平逆变器 空间电压矢量调制 中点电压波动 中点电压平衡控制 |
| 文章编号： | 1005-7277(2008)02-0006-04 |
| 修稿时间： | 2007-07-05 |
A comprehensive research on control method for three-level NPC inverter |
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| ZHOU Wen-sheng,YAO Gang,SONG Wen-xiang. A comprehensive research on control method for three-level NPC inverter[J]. Electrical Drive Automation, 2008, 30(2): 6-9,15 |
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| Authors: | ZHOU Wen-sheng YAO Gang SONG Wen-xiang |
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| Abstract: | The variation mechanism of neutral point(NP) potential is investigated in detail,establishes the average NP current model,therefore,the theory base is built for the balancing control of neutral point potential,and several important conclusions about variation of NP potential are given.Then,a novel balancing control of NP potential,based on space vector modulation pattern where a middle vectors are synthesized by redundant small vectors,is proposed.Theoretical analysis and experimental results indicate that the proposed method for NP balancing control vector synthesizing concept based can make the average NP current zero,and do not influence the NP potential within every sample period.The experimental results verify the validities of the proposed method. |
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| Keywords: | three-level inverter SVPWM variation of neutral-point potential NP potential balancing control |
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