Control strategy of small capacity power supply based on voltage feedforward compensation algorithm
YUAN Li-li
SUN Hong-yan
Abstract：Aiming at the control problem of small capacity power supply, a new control strategy for the small capacity power supply based on voltage feedforward compensation algorithm was proposed. Through the simplified analysis for two stage power conversion circuit, the dynamic mathematical model for the power supply system was observed, and the resonances caused by both DC link capacitor and grid side inductance were analyzed. Based on the frequency locked loop algorithm, the AC component of DC voltage ripple was extracted, and the voltage feedforward compensation controller was designed based on the simplified system model. Therefore, the effect of DC link voltage ripple on the load current was minimized to the maximum extent. The contrast experiments on a 5 kW DC power supply test platform were performed. The experimental results verify the properties of new control strategy.
Keywords：fuel cellelectrolyserDC power supplycontrolsmall capacitanceDC voltage ripplevoltage feedforwardfrequency-locked loop
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 607-611 )