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Stability Analysis of Grid-Forming Inverter Considering Different Operating Points
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| Author(s) |
Yi XIAO, Hao LUO, Yinxiao ZHU, Yongheng YANG, Marta MOLINAS, Dehong XU |
| Abstract |
In recent years, the grid-forming (GFM) converters have been widely studied to integrate renewable energy sources (RESs). However, the stability of GFM inverters under various operating points exhibits distinct characteristics, and its mechanism remains unclear. It is thus investigated in this paper. In order to explore this issue, the full-order multiple-input multiple-output (MIMO) small-signal model of the three-phase GFM inverter is established. Based on this MIMO model, the stability of the system under different operation points is accordingly explored. The exploration has revealed that the influence of different active power operating points appears in the low-frequency range. Besides, the GFM inverter is apt to be unstable under low damping and large virtual inertia conditions, when the power increases. Finally, the analysis is verified by simulations and experimental tests. |
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| Filename: | 0431-epe2023-full-09253114.pdf |
| Filesize: | 4.385 MB |
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| Type |
Members Only |
| Date |
Last modified 2023-09-24 by System |
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