Coordinated Control of Power Sources in Shipboard Microgrid using WMLMS and FFCF-QT1-PLL

The introduction of a solar photovoltaic (SPV) system is an excellent approach to reduce the pollution caused by marine vessels. The highly intermittent nature of the SPV array, on the other hand, generates instability in shipboard microgrids. Therefore, the battery as energy storage (BES) is integrated with a bidirectional converter (BDC) to smooth the high energy density and long-duration fluctuations. A Weibull M-transform least mean square (WMLMS) technique is used to mitigate the harmonics and voltage fluctuations caused by the local non-linear loads present in the ships. Frequency-fixed complex filter-based quasi-type-1 phase-locked loop (FFCF-QT1-PLL) is utilized to estimate the frequency and phase angle of the system voltages under all operating modes. In this paper, a shipboard microgrid consists of an SPV array, a diesel generator (DG), BES, and local non-linear loads. The microgrid is operated under different working conditions, and the outcomes are noted. The simulation results demonstrate that the DC-link voltages are controlled, proper power-sharing is sustained, and there is a smooth transition among various modes when this control scheme is applied.