Research And Implementation Of Wind-solar Complementary Charging Control Method Based On Genetic PID Algorithm

In the modern industrial society,the recycling of green energy has attracted more and more attention.The battery has the advantages of good structure,strong anti-seismic capacity,long life,and easy maintenance,which is an important part of the wind-solar hybrid power generation system.However,the complementary generation of wind energy has the problems of nonlinearity and instability.The charging of the battery may cause overcharge and undercharge,affecting the utilization of energy,causing damage to the battery,affecting the service life of the battery,etc.The charging method became a key issue.This paper compares and analyzes the charging characteristics of the battery and the charging method of the battery.The charging strategy of the battery is given.This strategy adopts the structure of double closed-loop negative feedback and uses the genetic PID control algorithm to charge the battery in three stages.The process of cross mutation genetics of genetic algorithm is used to select the PID optimal parameters and adjust the double closed-loop negative feedback PID controller to complete the effect of intelligent switching of the three working modes.The control method first adopts the maximum current acceptable by the battery for constant current.Charging,get 85% of the electricity,when the voltage reaches the preset value for constant voltage charging,when the battery power is close to saturation,with a floating charge to prevent its leakage.A simulation model of battery charging was established and simulated with simulation software.The simulation results of constant current charging,constant voltage charging and float charging were obtained.The charging current waveform of this method is in good agreement with the best battery absorption curve.The main control chip of this paper is TMS320F28335.The control circuit of wind-solar hybrid power generation system,load circuit,and double-loop three-stage charging control circuit are designed.The measured data are obtained.The following conclusions are obtained through comparison experiments: Wind-solar hybrid power generation The charging efficiency of the battery in the system has been effectively improved,extending its service life.