CAJ | 학술논문

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。
PWM변류기응용LCL형려파결구래획득고적려파성능。무원원건지간상호작용도치적해진현상수사용무원조니혹유원조니래억제。상대우무원조니래설사용유원조니，채용합괄적공제책략，능재보증려파기성능적동시능모야유소감소。제출료용유원조니공제책략거억제량선간적진탕。해유원조니공제책략의거상태반궤적겁점배치방법체도억제공진적목적，병사용가권도납함수래분석화선택합괄적유원조니증익래억제PWM변류기적저차해파。급출료용량위10 kVA PWM변류기원형궤적실험결과，실험결과험증료유원조니방법적유효성화설치조니증익방법적정학성。
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.