| 基于改进虚拟空间矢量调制方法的中点箝位型三电平逆变器电容电压平衡问题 |
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| 引用本文： | 申张亮,郑建勇,梅 军.基于改进虚拟空间矢量调制方法的中点箝位型三电平逆变器电容电压平衡问题[J].电力自动化设备,2011,31(3):79-84. |
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| 作者姓名： | 申张亮 郑建勇 梅 军 |
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| 作者单位： | 东南大学,电气工程学院,江苏,南京,210096 |
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| 摘 要： | 针对二极管箝位三电平逆变器在不同负载及调制比的条件下,传统的空间矢量调制方法中点电压存在不能平衡的区域.而利用虚拟空间矢量的调制方法,在输出三相电流之和为零时,即能实现对中点电压的完全控制,但需要进行大量的三角函数运算及扇区判断,增大了控制器的计算工作量和实现难度.提出一种改进的虚拟空间矢量调制方法.通过虚拟矢量空间尺...
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| 关 键 词： | 三电平逆变器 虚拟空间矢量调制 60°坐标系 中点箝位型 |
Capacitor potential balancing of neutral-point clamped three-level inverter based on improved virtual space vector PWM |
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| SHEN Zhangliang,ZHENG Jianyong and MEI Jun.Capacitor potential balancing of neutral-point clamped three-level inverter based on improved virtual space vector PWM[J].Electric Power Automation Equipment,2011,31(3):79-84. |
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| Authors: | SHEN Zhangliang ZHENG Jianyong and MEI Jun |
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| Affiliation: | SHEN Zhangliang,ZHENG Jianyong,MEI Jun(School of Electrical Engineering,Southeast University,Nanjing 210096,China) |
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| Abstract: | There is unbalanced area of neutral-point potential in traditional space vector PWM scheme for diode-clamped three-level inverters under different loads and modulation ratios.The virtual space vector PWM scheme,which may completely control the neutral-point potential when the sum of three phase output currents reaches zero,needs lots of trigonometric function calculations and sector judgment.An improved virtual space vector PWM scheme is presented.It enlarges the space scale of virtual vector to decrease th... |
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| Keywords: | three-level inverter virtual space vector PWM 60° coordinates system neutral point-clamped |
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