### Resumé

Originalsprog | Engelsk |
---|---|

Titel | Proceedings of 2019 IEEE COMPEL |

Antal sider | 7 |

Forlag | IEEE Press |

Publikationsdato | jun. 2019 |

Status | Accepteret/In press - jun. 2019 |

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*Proceedings of 2019 IEEE COMPEL*IEEE Press.

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*Proceedings of 2019 IEEE COMPEL.*IEEE Press.

**An Efficient Reduced-Order Model for Studying Synchronization Stability of Grid-Following Converters during Grid Faults.** / Taul, Mads Graungaard; Wang, Xiongfei; Davari, Pooya; Blaabjerg, Frede.

Publikation: Bidrag til bog/antologi/rapport/konference proceeding › Konferenceartikel i proceeding › Forskning › peer review

TY - GEN

T1 - An Efficient Reduced-Order Model for Studying Synchronization Stability of Grid-Following Converters during Grid Faults

AU - Taul, Mads Graungaard

AU - Wang, Xiongfei

AU - Davari, Pooya

AU - Blaabjerg, Frede

PY - 2019/6

Y1 - 2019/6

N2 - Renewable energy sources interfaced with the grid through power-electronic converters may lose stability and capability to perform as desired when exposed to severe grid faults. As a result of this, transient stability analysis and assessment are particularly important for power system studies. Usually, synchronization stability and transient stability analysis are performed by simulation studies containing a large amount of details, which makes this process highly time-consuming for large-scale systems. To circumvent this issue, a nonlinear second-order model is developed to capture the essential effects of the synchronization process of grid-tied converters during faults. Due to this low-order model, the stability assessment can be approached using phase-plane analysis with a low computational burden - more than 4000 times faster than the full-order switching model. The simplified model is verified against a detailed switching model and laboratory setup of the entire converter system indicating a high accuracy (>96%). Accordingly, the simplified reduced-order model can be used for accurate transient stability studies when a low availability of computational power is present, if large-scale systems are considered, or for detailed uncertainty and sensitivity analysis.

AB - Renewable energy sources interfaced with the grid through power-electronic converters may lose stability and capability to perform as desired when exposed to severe grid faults. As a result of this, transient stability analysis and assessment are particularly important for power system studies. Usually, synchronization stability and transient stability analysis are performed by simulation studies containing a large amount of details, which makes this process highly time-consuming for large-scale systems. To circumvent this issue, a nonlinear second-order model is developed to capture the essential effects of the synchronization process of grid-tied converters during faults. Due to this low-order model, the stability assessment can be approached using phase-plane analysis with a low computational burden - more than 4000 times faster than the full-order switching model. The simplified model is verified against a detailed switching model and laboratory setup of the entire converter system indicating a high accuracy (>96%). Accordingly, the simplified reduced-order model can be used for accurate transient stability studies when a low availability of computational power is present, if large-scale systems are considered, or for detailed uncertainty and sensitivity analysis.

KW - Grid fault

KW - Transient Stability

KW - Reduced-order model

KW - Grid-connected converters

M3 - Article in proceeding

BT - Proceedings of 2019 IEEE COMPEL

PB - IEEE Press

ER -