Stability-Oriented Analysis of a DC Shipboard Zonal Distribution System

The Medium Voltage Direct Current technology and the flexible zonal topology are the enablers to renovate the onboard power use. The several benefits due to DC zonal electrical distributions are possible only in presence of a smart management of the grid. On one side, the tomorrow DC ships must thus rely on a high-performing control, on the other the related large bandwidths can negatively influence the poles positioning of LC filtered systems. Indeed, a not-concurrent design of filters and control system can provide unsuitable solutions, where even a small perturbation can lead to unstable phenomena. To solve this issue, the integrated design procedure is proposed as effective to assure both power quality and stability target. This paper presents an optimized filter design to ensure the DC system stability by taking into account the control requirements. The new stability-oriented method is adopted to conceive the filtering solutions, later verified through eigenvalues analysis and Hardware-In-the-Loop simulations.