Improved Mode Predictive Sliding Control of Current Source PWM Rectifier
An improved predictive control strategy is proposed for the three phase current source rectifier(CSR) topology.Firstly,on the CSR AC side,the traditional finite set model predictive control is optimized with the prediction algorithm,which reduces the computational burden of the program.Secondly,on the CSR DC side,sliding mode control is used to obtain the grid side active power reference value,which improves the dynamic performance of the system.Aiming at the problem that the LC filter on the AC side of the CSR is prone to resonance,an active damping constraint is added to the cost function of the proposed control strategy;the Lomborg state observer is used to observe the capacitor voltage on the AC side of the CSR,which reduces the use of sensors.Grid side current reference is generated based on quantitative analysis of power flow,enabling constant output current,grid side current sinusoidal,and high input power factor even with unbalanced grid voltages.Finally,the correctness of the proposed control strategy is verified by Matlab/Simulink simulation and prototype experiments.
Model predictivestate observerunbalanced grid voltageactive dampingsliding mode controlharmonic analysis
万方数据
维普
