Coordinated voltage control strategy of wind farms cluster considering wind power fluctuation

Random fluctuation of active power output and wide variety of reactive power equipment are some of the typical characteristics of large scale wind farms cluster (WFC). In view of these characteristics, this paper proposed a coordinated strategy for reactive power and voltage control of WFC considering the influence of the wind power fluctuation. The control model of this strategy was built according to the wind power prediction, the present operation information and the historical operation information. By utilizing the automatic voltage control capability of wind farms and central substations, this strategy could achieve differentiated management between the discrete devices and the dynamic devices of WFC. The simulation results of an actual WFC in North China showed that the proposed strategy could not only improve the voltage control performance of the pilot bus, but also coordinate the operation between discrete devices and the dynamic devices and maintain the static voltage stability as well.