Gain and Phase: Decentralized Stability Conditions for Power Electronics-Dominated Power Systems
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866917563087192064 |
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| author | Huang, Linbin Wang, Dan Wang, Xiongfei Xin, Huanhai Ju, Ping Johansson, Karl H. Dörfler, Florian |
| author_facet | Huang, Linbin Wang, Dan Wang, Xiongfei Xin, Huanhai Ju, Ping Johansson, Karl H. Dörfler, Florian |
| contents | This paper proposes decentralized stability conditions for multi-converter systems based on the combination of the small gain theorem and the small phase theorem. Instead of directly computing the closed-loop dynamics, e.g., eigenvalues of the state-space matrix, or using the generalized Nyquist stability criterion, the proposed stability conditions are more scalable and computationally lighter, which aim at evaluating the closed-loop system stability by comparing the individual converter dynamics with the network dynamics in a decentralized and open-loop manner. Moreover, our approach can handle heterogeneous converters' dynamics and is suitable to analyze large-scale multi-converter power systems that contain grid-following (GFL), grid-forming (GFM) converters, and synchronous generators. Compared with other decentralized stability conditions, e.g., passivity-based stability conditions, the proposed conditions are significantly less conservative and can be generally satisfied in practice across the whole frequency range. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_08037 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Gain and Phase: Decentralized Stability Conditions for Power Electronics-Dominated Power Systems Huang, Linbin Wang, Dan Wang, Xiongfei Xin, Huanhai Ju, Ping Johansson, Karl H. Dörfler, Florian Systems and Control This paper proposes decentralized stability conditions for multi-converter systems based on the combination of the small gain theorem and the small phase theorem. Instead of directly computing the closed-loop dynamics, e.g., eigenvalues of the state-space matrix, or using the generalized Nyquist stability criterion, the proposed stability conditions are more scalable and computationally lighter, which aim at evaluating the closed-loop system stability by comparing the individual converter dynamics with the network dynamics in a decentralized and open-loop manner. Moreover, our approach can handle heterogeneous converters' dynamics and is suitable to analyze large-scale multi-converter power systems that contain grid-following (GFL), grid-forming (GFM) converters, and synchronous generators. Compared with other decentralized stability conditions, e.g., passivity-based stability conditions, the proposed conditions are significantly less conservative and can be generally satisfied in practice across the whole frequency range. |
| title | Gain and Phase: Decentralized Stability Conditions for Power Electronics-Dominated Power Systems |
| topic | Systems and Control |
| url | https://arxiv.org/abs/2309.08037 |