Research On Control Strategy In Wind Farms Participate In Rapid Frequency Regulation

Wind power is a friendly energy source.Making full use of wind energy can play a very positive role in environmental protection.Wind power generation is an important way to effectively utilize wind energy.With the increase of wind power penetration in power system,the operation of power system becomes more and more complicated.In order to ensure the safe and stable operation of the system,it is necessary to research the control strategy of wind power participating in rapid frequency regulation.The work of this paper mainly includes the following parts:firstly,the detailed model of each part of doubly-fed asynchronous wind turbine is analyzed,then the control strategy of the turbine is studied,and the equivalent aggregation method and parameter calculation rules of the wind farm are analyzed.Secondly,at the unit level,the basic principle of rapid frequency regulation of wind power is introduced,including rotor kinetic energy control and power standby control.Then,considering that the actual active power of the wind farm is related to the real-time wind speed and has a certain fluctuation,the fixed droop control parameters cannot adapt to the change of frequency at any time.Therefore,a dynamic droop control based on particle swarm optimization is proposed,which makes the droop control parameter adaptively change with the change of wind speed,and improves the ability of wind power to participate in the rapid frequency regulation of the system.Finally,considering the wide distribution of units in the same area,the wind speeds of different units are not the same.A coordinated dispatching and frequency control strategy was proposed to make the units in different wind speed regions undertake different active power,and effectively avoid the secondary drop of frequency,further improve the frequency response capacity of the wind farm.