Disturbance Observer-based Load Current Feedforward Control Method for Voltage Source Inverters
The conventional voltage source inverter load current feedforward control method mainly relies on the feedfor-ward control loop,which is far inadequate for feedforward control though can achieve better local control utility.Therefore this paper proposes a disturbance observer-based load current feedforward control method for voltage source inverters.This method extracts feedforward characteristics of the inverter load disturbance current,introduces the disturbance cur-rent as the feedforward signal,and uses the feedforward point as the output voltage to obtain the dynamic variation law of the inverter load current.At the same time,based on the disturbance observer,the current deviation of the voltage source inverter is controlled,and the load current is used as an external disturbance signal to suppress the interference of nonlin-ear loads,in order to meet the requirement of feedforward control.The method has been verified by simulation experiment well-performed in feedforward control.
disturbance observervoltage source typeinverterload currentfeedforward control method
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