Analytical Model of A Grid-Forming Inverter
Analytical Model of A Grid-Forming Inverter
复制标题
并网逆变器的分析模型
DOI：
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
Zhixin Miao
中科院分区：
文献类型：
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作者：
Ratik Mittal;Zhixin Miao
近年来，基于逆变器的资源正在快速融入电网。这些资源大多是电网跟踪逆变器，电网运行薄弱成为一个问题。研究重点现在已经转移到电网形成逆变器，它模拟同步发电机。因此，需要适当的建模和分析来理解电网形成逆变器。本文给出了并网逆变器在$dq$域并网运行时的非线性分析模型。当系统运行在弱电网条件下时，利用电磁暂态(EMT)试验台对所建立的模型进行了时间域的验证。分析模型也被用于进行特征值分析。在MatLab/Simscape中对EMT模型进行了仿真，在MatLab/Simulink中对解析模型进行了仿真。在实验室规模硬件设置的帮助下，还进行了硬件实验，以进行进一步的基准测试。
Recently, inverter-based resources are being integrated into the power grid at a rapid rate. Most of these resources are grid-following inverters, where weak grid operation becomes an issue. The research focus has now shifted towards grid forming inverters, which emulate synchronous generators. Thus proper modeling and analysis are required to understand the grid forming inverters. This paper presents the nonlinear analytical model of a grid forming inverter when operating in grid-connected mode in $dq$ -domain. The developed model is validated in the time domain with the Electromagnetic Transients (EMT) test bed when the system operates under weak grid conditions. The analytical model is also used to perform the eigenvalues analysis. The EMT model is simulated in MATLAB/Simscape and the analytical model is simulated in MATLAB/Simulink. Hardware experimentation is also performed for further bench-marking with the help of laboratory scale hardware setup.