Design of dual active low-frequency ripple control for clean-energy power conditioner

This study focuses on the design of a dual active low-frequency ripple control for a clean-energy power conditioning mechanism with an aim to achieve both the alleviation of the low-frequency current ripple of clean-energy sources, and the improvement of the ac power quality of a power conditioner. First, a simplified circuit for representing both the current ripple phenomena at the high-voltage bus and the polluted ac output terminal inside a general power conditioner including a dc/dc converter and a dc/ac inverter is derived, and the dynamic model of a dual active low-frequency ripple control circuit (DALFRCC) is analyzed. Moreover, two adaptive linear neural networks are taken as neural filters to generate the compensation current commands, and an adaptive total sliding-mode controller (ATSMC) is designed to manipulate the ripple control circuit for injecting respective suitable compensation currents into the high-voltage bus and the output terminal of the conditioner. In addition, the effectiveness of the proposed dual adaptive active low-frequency ripple control scheme has verified by numerical simulations.