Open AccessPower oscillation coordination damping control strategy of DFIG for fault ride through after clearing the fault
Author(s) -
Tang Haiyan,
Chi Yongning,
Tian Xinshou,
Li Yan
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8427
Subject(s) - control theory (sociology) , fault (geology) , rotor (electric) , engineering , induction generator , electric power system , controller (irrigation) , power (physics) , computer science , voltage , control (management) , physics , electrical engineering , agronomy , quantum mechanics , artificial intelligence , seismology , biology , geology
Wind turbines should have fault ride through capability, and also it can provide damping for the power grid by improving the control strategy. However, the currently corresponding control strategy is designed independent for the fault voltage through control and damping control. If the fault ride through control and damping control of a converter is uncoordinated under the grid fault, the output of the two control branches can be superimposed, which will affect the output power dynamic performance of doubly fed induction generator (DFIG) after clearing the fault. At the same time the overcurrent and other issues may occur in serious cases, and even lead to DFIG trip off. Based on the dynamic process analysis of DFIG after clearing the fault, an additional damping controller in the rotor side converter control of DFIG is designed, which damps the system low‐frequency oscillation by modulating the rotor active current component. A coordination damping control strategy of DFIG based on a fault ride through control and damping control is proposed for damping the power oscillation after clearing the fault, the correctness of the proposed control method has been verified through time‐domain simulation.