| Autor: |
ZHANG Yijing, DING Haoyin, SHI Yanqiang, HUANG Zhiguang, ZHONG Weilun, XU Bo |
| Jazyk: |
čínština |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Zhejiang dianli, Vol 43, Iss 7, Pp 103-110 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
1007-1881 |
| DOI: |
10.19585/j.zjdl.202407012 |
| Popis: |
To delve into the mechanism behind wideband oscillation instability in voltage source converter based high voltage direct current （VSC-HVDC） transmission system and swiftly assess system stability with precision， a modeling method and a stability criterion based on z-domain impedance are proposed. Firstly， employing precise discretization techniques， a z-domain impedance model is established for voltage-source converters considering phase-locked loops （PLLs）， inner-current loop， and voltage feedforward control， along with a z-domain impedance model for AC grids in a global coordinate system. Subsequently， a criterion for generalized forbidden zone is proposed using Gershgorin circle theorem to analyze the impact of phase-locked loops and line impedances on system stability. Finally， simulation analysis is conducted on the VSC-HVDC system to demonstrate the effectiveness of the proposed generalized impedance criterion. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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