Event‐Triggered Bipartite Consensus Control for Two‐Stage AC–DC Rectifier–Regulator Power Supplies

This paper investigates an event‐triggered bipartite coordination strategy for a two‐stage AC–DC power supply consisting of a single‐phase rectifier followed by a DC–DC buck regulator. The overall converter is modeled as a two‐agent signed network in which the rectifier regulates the DC‐link voltage, the buck regulates the load voltage, and the interaction between the two stages is represented through a signed coupling structure. By introducing a gauge transformation, the bipartite interaction is recast into an equivalent standard consensus form, which enables the development of a tractable outer‐loop coordination law. The proposed scheme preserves the conventional inner PI voltage‐control loops and adds a slower event‐triggered supervisory layer that updates the coordination signal only when a state‐dependent condition is violated. A Lyapunov‐based analysis is used to show that, for a positive trigger offset, the averaged rectifier–buck dynamics are practically stable and the inter‐event times admit a strictly positive lower bound, thereby excluding Zeno behavior; asymptotic convergence is recovered in the limiting case of zero offset. MATLAB simulations at 12‐ and 48‐V operating points, under large load steps and moderate line variations, show that the method maintains acceptable DC‐link and output‐voltage regulation while reducing the number of outer‐loop coordination updates by about compared with a fixed‐rate outer layer. These results suggest that the proposed event‐triggered bipartite coordination mechanism can be implemented as a firmware‐level supervisory add‐on for digitally controlled rectifier–buck systems when reduced coordination activity is desired.