An Integrated Design Approach for LCL-Type Inverter to Improve Its Adaptation in Weak Grid

Energies

Shuangyin Dai¹  Yuzheng Tang¹  Chen Zheng¹  Bo Zhang¹  Qionglin Li¹  Shuming Liu¹  Yajuan Liu²  Mingxuan Mao³ 

[1] State Grid Henan Electric Power Research Institute, Zhengzhou 450052, China;State Grid Zhengzhou Electric Power Supply Company, Zhengzhou 450052, China;;State Key Laboratory of Power Transmission Equipment &

关键词: grid-connected inverter;    parameters integration design method;    weak grid;    adaptation;   

DOI  :  10.3390/en12132637

来源: DOAJ

【 摘 要 】

To improve the robustness of grid-connected inverter against grid impedance in a weak grid an integrated design method of LCL-filter parameters and controller parameters is proposed. In the method the inherent relation of LCL-filter parameters and controller parameters is taken into consideration to realize their optimized match. A parameter normalization scheme is also developed to facilitate the system stability and robustness analysis. Based on the method all normalization parameters can be designed succinctly according to the required stability and robustness. Additionally, the LCL parameter and controller parameter can be achieved immediately by restoring normalization parameters. The proposed design method can guarantee the inverter stability and robustness simultaneously without needing any compensation network, additional hardware, or the complicated iterative computations which cannot be avoided for the conventional inverter design method. Simulation and experiment results have validated the superiority of the proposed inverter design method.

【 授权许可】

Unknown