| 摘要: |
| PWM变流器应用LCL型滤波结构来获得高的滤波性能。无源元件之间相互作用导致的谐振现象需使用无源阻尼或有源阻尼来抑制。相对于无源阻尼来说使用有源阻尼，采用合适的控制策略，能在保证滤波器性能的同时能耗也有所减少。提出了用有源阻尼控制策略去抑制两线间的振荡。该有源阻尼控制策略依据状态反馈的极点配置方法达到抑制共振的目的，并使用加权导纳函数来分析和选择合适的有源阻尼增益来抑制PWM变流器的低次谐波。给出了容量为10 kVA PWM变流器原型机的实验结果，实验结果验证了有源阻尼方法的有效性和设置阻尼增益方法的正确性。 |
| 关键词: PWM变流器 LCL型滤波 有源阻尼 状态反馈 加权导纳函数 |
| DOI：10.7667/j.issn.1674-3415.2015.09.017 |
| 投稿时间：2014-08-02修订日期：2014-10-09 |
| 基金项目: |
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| Analysis of differential mode active damping application in PWM converter |
| DIAO Qian,LU Kang |
| (School of Electrical Engineering, Anhui University of Science and Technology, Huainan 232001, China) |
| Abstract: |
| PWM converter applies LCL filter structure to obtain high filtering performance. The interaction of passive components will cause resonance phenomenon in a filter, these oscillations need to use the passive damping or active damping to suppress. Not only passive damping will lead to the increase of energy consumption, but also reduce the efficiency of filter. Using active damping and applying appropriate control strategies can ensure filter performance while have less energy consumption compared with passive damping. An active damping control strategy is presented to suppress the oscillation between two lines. The active damping control strategy suppresses resonance based on state feedback pole assignment method, and uses weighted admittance functions to analyze and select the appropriate active damping gain to suppress low harmonics of PWM converter. The experimental results of capacity of 10 kVA PWM prototype converter are also given, the experimental results verify the effectiveness of the active damping method and the correctness of the gain setting damping method. |
| Key words: PWM converter LCL filter active damping state feedback weighted admittance functions |
