Simulation analysis of turbine generation based on grid connected structure of dual PWM converter
Aiming at the unstable operation of water turbine power generation system,a structure and control strategy of hydro-power grid connection system based on double pulse width modulation converter is proposed.Among them,for machine side control,unit power factor and weak magnetic control are introduced,and direct power control strategy is introduced for network side control.The results show that in the machine side control,the rotation speed of the motor increases to 1 680 r/min when the load changes at 0.5 seconds.Subsequently,the rotational speed gradually decreased and stabilized in 0.03 s.Meanwhile,in the network side con-trol,the actual voltage of the DC bus increases from 650V to 710 V at 0.5 s,but it is rapidly reduced and stabilized at the set value within 0.025 s.It shows that the machine side and network side control strategies proposed by the institute can effectively deal with the change of demand load,and maintain the stability of the motor speed and DC bus voltage,which provides a strong guarantee for the stable operation of the turbine power generation system.
double PWM converterhydropower grid connectionwater turbine power generationPMSG
万方数据
维普
