Improved Direct Power Control of Rectifier Stage of Power Electronic Traction Transformer
[Objective]In order to improve the poor anti-interference ability,sensitivity to parameter changes,and high harmonic content of the PETT rectifier stage under traditional dq current decoupling double closed-loop control in order to improve the problem.[Method]By improving the decoupling method of DPC,a power decou-pling controller based on ADRC was proposed,without requiring system angular frequency and inductance pa-rameters.Finally,a model was built in Matlab/Simulink for simulation analysis under different operating condi-tions.[Result]The simulation results showed that the new control strategy reduced the THD value of the grid side current by 5.38%compared to the traditional control strategy,reduced the voltage drop value by 48 V when the equivalent induct-ance suddenly changed,and reduced the voltage drop value by 14 V when the voltage fre-quency shifted.[Conclusion]This controller achieves precise and independent control of active and reactive power through decoupling.The new control strategy has good balance control effect under load sudden change and load im-balance conditions.The simulation results verify the rationality and effectiveness of the proposed control strategy.
single phase cascade H-bridge rectifierpower electronic traction transformeractive disturbance re-jection decouplingcapacitor voltage balancedirect power control
万方数据
维普
