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文章摘要
数字控制下LCL型并网逆变器的环路滞后补偿方法
A method of loop lag compensation of LCL-type grid-connected inverters under digital control
Received:April 07, 2020  Revised:April 07, 2020
DOI：10.19753/j.issn1001-1390.2021.09.016
中文关键词: 并网逆变器  LCL谐振频率  弱电网  滞后补偿  鲁棒性  控制延时
英文关键词: 
基金项目:
Author NameAffiliationE-mail
Feng Tingting* State Grid Chongqing Economic Research Institute 3081553107@qq.com 
2 2 1@qq.com 
3 3 3@qq.com 
4 4 4@qq.com 
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中文摘要:
      基于数字控制的LCL型并网逆变器会产生不可忽略的控制延时，使系统表现为非最小相位特性，而用于抑制LCL谐振的有源阻尼方法受控制延时影响，大幅改变了开环增益的相频曲线，在电网阻抗宽泛变化的弱电网中，系统鲁棒性将严重降低。本文从系统开环增益的特性入手，提出一种环路滞后补偿方法，合理设计了滞后环节的补偿参数，详细分析了所提方法在弱电网中的鲁棒性，分析结果表明该方法可分离阻尼分界频率与环路一次穿越频率，能保证系统良好的适应弱电网，最后通过仿真模型验证了理论分析的正确性与所提方法的有效性。
英文摘要:
      
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