Open AccessImpact of DFIG‐based wind farm integration on sub‐synchronous torsional interaction between HVDC and thermal generators
Author(s) -
Gao Benfeng,
Hu Yunting,
Song Ruihua,
Li Ren,
Zhang Xuewei,
Yang Lin,
Zhao Shuqiang
Publication year - 2018
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2018.0328
Subject(s) - induction generator , wind speed , wind power , rectifier (neural networks) , control theory (sociology) , doubly fed electric machine , high voltage direct current , engineering , voltage , marine engineering , ac power , environmental science , electrical engineering , computer science , direct current , meteorology , physics , control (management) , artificial intelligence , stochastic neural network , machine learning , recurrent neural network , artificial neural network
In western China, large‐scale wind power is generally bundled with thermal power, and transmitted to eastern China by high‐voltage direct current (HVDC) systems. This constitutes the wind–thermal bundled system transmitted by HVDC (WTBH). In this study, a typical studied system of WTBH is presented, and its models for eigenvalue analysis are introduced. To improve the efficiency of eigenvalue analysis, an improved block modelling method is proposed for building the state‐space model of WTBH. By eigenvalue analysis and electromagnetic transient (EMT) simulation, the impact of doubly‐fed induction generator (DFIG)‐based wind farm integration on sub‐synchronous torsional interaction (SSTI) between thermal generators (TGs) and HVDC was investigated. The sensitivity of the operating parameters of DFIG‐based wind farms was analysed, including wind speed, wind farm scale, and distance between the wind farm and HVDC rectifier station. The obtained results show that the integration of DFIG‐based wind farms can mitigate the SSTI between the TG and HVDC. The system becomes more stable as the wind speed and wind farm scale increase or the distance between the wind farm and HVDC rectifier station decreases. The conclusions of this study are validated through EMT simulations in PSCAD/EMTDC, and provide theoretical reference for practical WTBH projects.