Open AccessModel‐based control addition to prescribe DFIG wind turbine fast frequency response
Author(s) -
David Nicholas,
Prevost Thibault,
Xavier Florent,
Wang Zhaoyu
Publication year - 2019
Publication title -
wind energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.743
H-Index - 92
eISSN - 1099-1824
pISSN - 1095-4244
DOI - 10.1002/we.2360
Subject(s) - control theory (sociology) , turbine , controller (irrigation) , inertia , induction generator , frequency response , transient response , flywheel , automatic frequency control , wind power , transient (computer programming) , engineering , frequency grid , computer science , voltage , physics , automotive engineering , control (management) , electrical engineering , artificial intelligence , mechanical engineering , telecommunications , agronomy , classical mechanics , biology , operating system
This paper investigates the physical capability of double‐fed induction generator (DFIG) wind turbines for inertial support of frequency response. Frequency stability is modeled using the DFIG electromechanical and generator controller dynamics, and a destabilizing effect is demonstrated in low‐inertia systems. To improve response, a synchronous reference frame DFIG controller is proposed that acts by following low‐frequency grid dynamics and adds a fast acting proportional plus integral (PI)‐controlled frequency‐responsive component to existing qd current commands. The proposed controller is derived in a straightforward manner using only the DFIG dynamic equations and is designed using pole/zero placement techniques. Laboratory experiments using a micro‐scale DFIG wind turbine with hub‐emulating flywheel prove better capability for transient frequency regulation even under extreme load change. The result is a DFIG controller that balances the appearance of transients in electrical and mechanical systems. Value is achieved in providing immediate continuous inertial response to support load change. The proposed frequency response can improve the use of existing physical inertia from wind turbines.