<p>The distributed power-collection and cascaded boosting-voltage (DPCB) converter system, which is widely adopted in renewable energy integration scenarios, exhibits slow dynamic response, pronounced parameter variations, and cumbersome control structure under the traditional cascaded PI (Proportional-Integral Control) strategy. To address these drawbacks and enhance the system’s steady-state precision and transient response capability, this paper proposes a direct-voltage sliding mode control (SMC) strategy with an improved hybrid-sliding surface for DPCB converters. Three key innovations are elaborated as follows: First, a direct-voltage SMC framework is designed to simplify the conventional cascaded double-loop configuration, effectively boosting the system’s dynamic responsiveness and strengthen robustness against parameter perturbations and external disturbances. Second, a novel hybrid-sliding surface integrating voltage-sliding and intermediate current-sliding components is proposed to mitigate the inevitable current fluctuations caused by the removal of the inner current loop. Third, an optimal weight coefficient for the hybrid-sliding surface is determined through a comprehensive evaluation of the system control targets and multi-objective performance metrics. Finally, the feasibility and superiority of the proposed strategy are fully verified via detailed simulations and hardware-in-the-loop experiments.</p>