Enhancing Stability in Multimode Hybrid Power Supply Systems Under Stepped Constant Power Loads: A Synergetic Control Approach

In hybrid power supply systems (HPSS), the widespread use of power electronic converters inevitably introduces constant power loads (CPLs). In real‐world operation, these CPLs often exhibit abrupt, step‐like changes in power demand–referred to as stepped CPLs. Such behavior can severely compromise system stability, primarily because source‐ and load‐side converters are typically designed independently, without accounting for their dynamic interactions within the tightly coupled architecture of an HPSS. To address this challenge and improve system robustness, this paper proposes a synergetic control (SC) strategy tailored for multimode operation—seamlessly supporting both grid‐connected and islanded scenarios. The approach offers two key benefits: (1) It enables coordinated regulation of multiple system variables, and (2) it delivers optimal performance with respect to predefined control objectives. Theoretical analysis has been provided to guarantee the effectiveness. Simulation results confirm that the proposed SC strategy effectively enhances dynamic response and maintains stability under significant stepped CPL disturbances.