This paper proposes a frequency regulation strategy of wind power based on grouping control and staggered recovery for power system with high wind power penetration. Firstly, basing on the response characteristics of proposed scheme with different parameter settings, wind turbines are divided into two groups, laying foundation for the subsequent staggered rotor recovery to mitigate secondary frequency impact. When frequency event occurs, both of the groups raise power to the torque limit to arrest frequency decline. Considering that frequency regulation schemes based on rotor speed or releasable kinetic energy are decoupled from frequency, the proposed scheme regulates wind power with a coefficient designed for suppressing frequency overshoot. The simulation results indicate that by executing rotor speed recovery staggeringly and proceeding the course of regaining MPPT operation by adjusting wind power in a “First repress then raise” way, the proposed scheme smooths the process of frequency regulation effectively without making it to be excessively time-consuming. Meanwhile, the coefficient proposed for suppressing frequency overshoot enhances the adaptability of regulation schemes that are decoupled from frequency after being triggered, towards disturbances of different severities.
LAO Huanjing,ZHANG Li,ZHAO Tong,et al.Frequency Regulation Strategy for Wind Power Considering Grouping Control and Orderly Recovery[J/OL].Automation of Electric Power Systems,http://doi.org/10.7500/AEPS20200312006.