Research On Primary Frequency Control Strategy For Wind Storage Hydrogen Production Power Plant

Under the 3060 dual carbon target,the scale of wind power grid connection has increased year by year.However,due to the decoupling of the power generated by wind turbines from the grid frequency and the lack of active reserve,the frequency damping of the power grid decreases,hindering the improvement of wind power penetration rate,which is not conducive to the achievement of the 3060 dual carbon target.The proposal of frequency modulation control based on wind storage hydrogen production power plants is one of the main methods to solve the above problems.Therefore,this article conducts research on wind storage hydrogen production power plants.Firstly,this article studies the basic principle of wind power participating in grid frequency regulation,and analyzes the current technical status of the operation of electric hydrogen production devices and their participation in grid frequency regulation.A mathematical model of wind storage integrated doubly fed induction generator unit and electrolytic cell was established,and its control strategy was studied and analyzed.A simulation model of the wind storage integrated doubly fed induction generator unit was built using MATLAB/Simulink,and the effectiveness of its control strategy was verified.Secondly,addressing the issue of decoupling the output power of wind turbines from the grid frequency.By studying and analyzing the frequency modulation characteristics of traditional synchronous generator units and the frequency modulation potential of wind storage hydrogen production plants,a primary frequency modulation control strategy considering the frequency modulation potential of wind storage hydrogen production plants is proposed.The simulation results show that this strategy effectively reduces the amplitude of grid frequency deviation and slows down the rate of change of grid frequency deviation from the rated frequency through fuzzy droop control and LOGISTIC regression function.Once again,in response to the high cost of frequency modulation in existing frequency modulation schemes,the electrical and economic characteristics of electric hydrogen production and energy storage devices were analyzed and compared,and a cost function for the demand side response of supercapacitor energy storage devices and electric hydrogen production devices was constructed.Based on this,a collaborative control strategy was proposed for the electric hydrogen production device and the supercapacitor energy storage device.This strategy is based on the EEMD algorithm,allowing the supercapacitor energy storage device to bear the high-frequency component in the frequency modulation power command,and the demand side of the electric hydrogen production device to bear the low-frequency component in the frequency modulation power command.The simulation results show that this method can reduce the required configuration of supercapacitor capacity and the total cost of frequency modulation.Finally,research will be conducted on the power allocation of supercapacitors in wind storage integrated clusters.By analyzing the power flow of wind storage integrated units,the necessity of unifying the maximum power output duration of distributed supercapacitors is expounded.The collaborative control strategy for the maximum power output duration consistency of distributed supercapacitors was studied and analyzed.The simulation results show that this strategy can maximize the maximum power output duration of the entire supercapacitor energy storage system.