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汪玉凤,朱秋明,徐德,赵东.基于载波SPWM与SVPWM混合控制的三电平逆变器中点电位平衡策略[J].电源学报,2019,17(2):84-91
基于载波SPWM与SVPWM混合控制的三电平逆变器中点电位平衡策略
Balancing Strategy for Neutral-point Potential of Three-level Inverter Based on Hybrid Control of Carrier SPWM and SVPWM
投稿时间:2016-10-27  修订日期:2018-10-15
DOI:10.13234/j.issn.2095-2805.2019.2.84
中文关键词:  钳位型三电平逆变器  中点电位  零序分量  混合控制
英文关键词:clamped three-level inverter  neutral-point potential  zero-sequence component  hybrid control
基金项目:国家自然科学基金资助项目(51307076)
作者单位E-mail
汪玉凤 辽宁工程技术大学电气与控制工程学院, 葫芦岛 125105  
朱秋明 辽宁工程技术大学电气与控制工程学院, 葫芦岛 125105 13591992819@163.com 
徐德 国网辽宁省电力有限公司阜新供电公司, 阜新 123000  
赵东 国网辽宁省电力有限公司阜新供电公司, 阜新 123000  
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中文摘要:
      针对空间矢量脉宽调制SVPWM(space vector pulse width modulation)在功率因数较低的情况下,失去对钳位型三电平逆变器直流母线中点电位的控制效果的问题。通过研究载波正弦脉宽调制SPWM(sinusoidal pulse width modulation)与SVPWM的本质联系,将从SVPWM调制原理出发,推导出控制中点电位所需的零序分量,构造相应的调制波,通过载波SPWM法抑制中点电位波动,从而提出一种基于载波SPWM与SVPWM混合控制的中点电位平衡策略。最后仿真结果验证了这种混合控制策略可以有效地抑制中点电位漂移。
英文摘要:
      Under the condition of a lower power factor, space vector pulse width modulation(SVPWM) cannot con-trol the DC bus neutral-point potential of a clamped three-level inverter. Based on the study of the essential relation between carrier sinusoidal pulse width modulation(SPWM) and SVPWM, the zero-sequence components required by co-ntrolling the neutral-point potential are deduced according to the modulation principle of SVPWM. In this way, the corresponding modulation wave is constructed. By suppressing the fluctuation of neutral-point potential using the carrier SPWM method, a neutral-point potential balancing strategy is proposed based on the hybrid control of carrier SPWM and SVPWM. Simulation results verify that this hybrid control strategy can effectively suppress the fluctuation of neutral-point potential.
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