论文部分内容阅读
针对嵌套式中点钳位NNPC四电平逆变器提出一种减小共模电压的载波调制策略.与传统四电平正弦脉宽调制 (SPWM) 相比, 提出的调制策略只采用2个三角载波可将共模电压减小到直流母线电压的1/18, 同时具有电容电压平衡能力.最后对传统调制方案和该文提出的调制方案进行稳态和暂态测试, 结果验证提出的方案的有效性.“,”A new double-carrier-based modulation method is proposed for the common-mode voltage reduction in fourlevel nested neutral point clamped (NNPC) inverter. Compared with conventional sinusoidal pulse width modulation (SPWM), the common-mode voltage in the proposed method can be reduced to 1/18 of DC-link voltage with only two carriers. Meanwhile, it can achieve the capacitor balancing. Finally, the proposed method is verified by both the steadystate and dynamic test results.