Open AccessMechanism and Mitigation Strategy of Sub-synchronous Oscillation Caused by Grid-connected DFIG with Series Compensation
Author(s) -
Jing Yang,
Sun Yong,
Ladier Fa,
Shuhan Zhang,
Wenwen Wang,
Limin Mei
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2125/1/012009
Subject(s) - compensation (psychology) , doubly fed electric machine , control theory (sociology) , induction generator , mechanism (biology) , oscillation (cell signaling) , generator (circuit theory) , grid , computer science , electric power transmission , controller (irrigation) , filter (signal processing) , ac power , power (physics) , control engineering , wind power , control (management) , engineering , voltage , mathematics , physics , electrical engineering , quantum mechanics , computer vision , artificial intelligence , psychoanalysis , biology , genetics , psychology , geometry , agronomy
Power systems are at risk of sub-synchronous oscillation (SSO) when connecting doubly-fed induction generator (DFIG)-based wind turbines to transmission lines with series compensation. This paper focuses on the mechanism and mitigation strategy of SSO. Firstly, the mechanism of SSO is studied from two aspects: induction generator effect (IGE) and sub-synchronous control interaction (SSCI). An equivalent circuit is developed to illustrate the negative resistance effect. Based on the result of the analysis, the SSO mitigation strategy using notch filter and virtual resistance control is proposed. In order to verify the result of analysis and the effectiveness of mitigation strategy, time-domain simulations are carried out based on PowerFactory DIgSILENT.