Stability Margin Monitoring Method for N Subsystems Cascaded DC Distributed Power Systems

For two subsystems cascaded DPS, the stability margin monitoring can be implanted via current/voltage perturbation method. But for N subsystems cascaded DPS, the stability margins are different at different interfaces, which results in the stability margin monitoring problem. This paper analyzes the reasons of this phenomenon and proposes a new interface-less stability margin monitoring method. Simulation results verify the proposed method.