LIU Qihui,YAN Jiaying,WU Yong,et al.Characteristics and Suppression of Transient Overvoltage for DFIG Wind Power Grid-connected System Considering Phase Locking Error[J].Automation of Electric Power Systems,2023,47(11):165-173.
LIU Qihui,YAN Jiaying,WU Yong,et al.Characteristics and Suppression of Transient Overvoltage for DFIG Wind Power Grid-connected System Considering Phase Locking Error[J].Automation of Electric Power Systems,2023,47(11):165-173. DOI: 10.7500/AEPS20221019002.
Characteristics and Suppression of Transient Overvoltage for DFIG Wind Power Grid-connected System Considering Phase Locking Error
When an AC short circuit fault occurs in the wind power grid-connected system
the phase locking error of the phase locked loop (PLL) leads to the power coupling of the wind turbine
which will generate a transient overvoltage at the time of fault clearing. It is urgent to study the transient overvoltage mechanism
characteristics and suppression strategy considering the phase locking error. First
the influence of PLL parameters
fault locations and fault types on transient overvoltage is analyzed. Then
taking the three-phase fault as an example
the characteristics of phase angle jumping and the mechanism of transient overvoltage caused by phase locking error are revealed
and the control strategy of the rotor-side converter (RSC) and the grid-side converter (GSC) based on the improved PLL structure and phase locking error compensation is proposed to realize the active suppression of doubly-fed induction generator (DFIG) transient overvoltage. Finally
simulation verifies that the proposed strategy can not only achieve fault ride-through of DFIG
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