Differential Flattening Control Strategy for Hexagonal Converters under Unbalanced Grid Voltage
As a topology of AC/AC converter with multi-port,low-frequency and high reliability,hexagonal converter(Hexverter)can be applied to offshore wind power.However due to the nonlinear characteristics of Hexverter,the control effect of linear PID control strategy is poor when Hexverter is applied to the offshore wind power.For this reason,this paper combines the nonlinear differential flattening control(DFC)with Hexverter,and proposes a DFC strategy for Hexverter by analyzing its stability.Based on MATLAB software and RT-LAB semi-physical experimental platform,the DFC system of Hexverter is established to simulate and compare the various working conditions,verifying the feasibility of the proposed DFC strategy.
万方数据
维普
