Model Predictive Control Strategy for Multiphase Interleaved DC-DC Converters Optimized with Luenberger Disturbance Observer

To enhance the control quality of the DC-DC interleaved parallel converter, this paper first establishes the small-signal model of the converter. A Luenberger disturbance observer (LDO) is employed within a feedback correction structure to estimate unknown model discrepancies and system disturbances. The deviation between actual values and observed values is fed back online into the observer model for real-time model correction, thereby achieving state reconstruction. This approach compensates for the steady-state errors in model predictive control (MPC) applications caused by modeling inaccuracies and the inherent lack of integral action, while simultaneously addressing parameter mismatch issues during dynamic operation.