
Centralised solution for subsynchronous control interaction of doubly fed induction generators using voltage‐sourced converter
Author(s) -
Wang Liang,
Xie Xiaorong,
Jiang Qirong,
Liu Xiangdong
Publication year - 2015
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.2015.0720
Subject(s) - control theory (sociology) , controller (irrigation) , voltage , engineering , generator (circuit theory) , eigenvalues and eigenvectors , electric power system , power (physics) , computer science , control (management) , electrical engineering , physics , artificial intelligence , quantum mechanics , agronomy , biology
Practical subsynchronous instability events have been observed in doubly fed induction generator‐based wind farms, which are radially connected to fixed series compensated transmission lines. As a special type of subsynchronous resonance, this phenomenon is described here as subsynchronous control interaction (SSCI). This study proposes a centralised SSCI mitigation scheme named as subsynchronous damper (SSD). In this scheme, an additional high‐power electronic voltage‐sourced converter is added to the collection bus of wind farms. It is designed to dissipate the electrical resonance power of SSCI. Thus, SSD provides positive damping for SSCI. Its basic principle is explained with equivalent electric circuit and the sufficient conditions for stabilisation are obtained mathematically. Controller design guidelines are given and have been verified first by eigenvalue analysis. Then a method to choose the capacity of power electronic converter is proposed. The effectiveness of SSD is finally demonstrated by extensive time‐domain simulations on a target system.