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首页> 外文期刊>Smart Grid, IEEE Transactions on >Line Impedance Cooperative Stability Region Identification Method for Grid-Tied Inverters Under Weak Grids
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Line Impedance Cooperative Stability Region Identification Method for Grid-Tied Inverters Under Weak Grids

机译：线路阻抗协同稳定性区域弱网格旋转逆变器的稳定性区域识别方法

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摘要

Although the low-frequency/harmonic oscillation of grid-tied inverters under weak grids has been widely researched, the classical impedance-based approach focuses more on the identification of stable operating points and the stability margin of return-ratio matrix. Furthermore, it cannot provide stability regions of system parameters. Therefore, this paper proposes a line impedance cooperative stability region identification method. Firstly, the output impedance matrix and the input admittance matrix are respectively built in d-q axis. Secondly, a novel stability forbidden region is proposed. It is less conservative than the forbidden region criteria in existing literatures. Based on the stability forbidden region, the stability operation region is established via mirror, translation and rotation mappings. It is less conservative compared with the norm-based stability criteria. The solving of stability operation region is first transformed into the eigenvalue identification problem in this paper. Furthermore, the detailed line impedance cooperative stability region is solved by guardian map theory. It can provide guidance for system planning and stabilization method researches with simplified computational process. Finally, the simulation and experimental results show that the proposed line impedance cooperative stability region identification method is more effective and less conservative.
机译：尽管在弱网格下的电网绑定逆变器的低频/谐波振荡已被广泛研究，但经典阻抗的方法更加侧重于识别稳定的操作点和返回比矩阵的稳定性余量。此外，它不能提供系统参数的稳定区域。因此，本文提出了一种线路阻抗协作稳定性区域识别方法。首先，输出阻抗矩阵和输入进入矩阵分别构建为D-Q轴。其次，提出了一种新的稳定性禁区。它比现有文献中的禁区标准更保守。基于稳定性的禁区，通过镜像，平移和旋转映射建立稳定性操作区域。与基于规范的稳定标准相比，它的保守较少。在本文中首先将稳定性操作区域的求解为特征值识别问题。此外，通过监护地图理论解决了详细的线路阻抗协同稳定区域。它可以为简化计算过程提供系统规划和稳定方法研究的指导。最后，仿真和实验结果表明，所提出的线路阻抗协作稳定区鉴定方法更有效，保守较少。

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