| 黄海宏,陈志强,王海欣.零序电压注入法控制三电平 NPC 中点电位平衡[J].电子测量与仪器学报,2020,34(6):138-143 |
| 零序电压注入法控制三电平 NPC 中点电位平衡 |
| Zero sequence voltage injection to control neutral potential balance of three-level NPC |
| |
| DOI： |
| 中文关键词: 二极管钳位 三电平变流器 中点电位平衡 零序电压注入 |
| 英文关键词:diode clamped three-level converter neutral potential balance zero sequence voltage injection |
| 基金项目:国家自然科学基金(51177037)资助项目 |
|
|
|
|
| 摘要点击次数: 361 |
| 全文下载次数: 1431 |
| 中文摘要: |
| 学术界有两种解决中点电位波动问题的思路,基于空间矢量调制( SVPWM) 控制的小矢量调节和基于载波调制
(SPWM)控制的零序电压注入。 采用的中点电位平衡控制方法是带校正控制的改进型的零序电压注入法,相较于传统的零序
电压注入法,不仅兼顾了传统鞍形调制波的优势,还解决了此种调制波存在的过调制问题,并研究了实用的校验与修正零序电
压计算方法,使得中点电位波动限制在 5 V 以内,网侧电流 THD 也相应的降低了 1%。 最后通过 MATLAB/ Simulink 软件仿真和
实验验证了所述控制方法的正确性和可行性。 |
| 英文摘要: |
| There are two ways to solve the problem of midpoint potential fluctuation in the academic world: One is small vector adjustment
based on SVPWM control; the second is zero-sequence voltage injection based on SPWM control. The midpoint potential balance control
method used in this paper was an improved zero-sequence voltage injection method with correction control. Compared with the traditional
zero-sequence voltage injection method, it took into account the advantages of traditional saddle-shaped modulated waves, and improved
the over-modulation problem, and studied the practical zero-sequence voltage calculation method, which finally effectively suppresses the
fluctuation of the midpoint potential, and the practical calculation method of checking and correcting zero sequence voltage is studied,
the fluctuation of medium voltage point is successfully limited to 5 V, and the THD of grid side current is correspondingly reduced by
1%. Finally, the correctness and feasibility of the control method are verified by MATLAB/ Simulink software simulation and
experiment. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
