A Black Widow Optimization and Power Management Strategy for Emission-Free Marine Microgrid

In order to reduce water pollution, it is an effective method to interface the non-conventional energy sources in the marine sector. This paper assesses the performance of the emission-free marine microgrid under different operational modes. In the MATLAB-Simulink platform, an emission-free ferry with a battery energy storage (BES), solar photovoltaic system (SPV), propulsion motors and service loads is developed and operated under different sea conditions. Due to the stochastic nature of the SPV array, the ferry employs a BES. A power management system (PMS) is essential in the coordination between the power generation sources and loads. The stability of the common DC bus and the propulsion motor's speed regulation is ensured with the help of Black Widow Optimization (BWO). The optimized DC bus ensures active power balancing, harmonic reduction and reduced transients under dynamic conditions. The dual second-order generalized integrator and a modified quasi type-1 phase-locked loop (DSOGI-MQT1-PLL) are employed for the cold ironing mode. It helps in synchronizing the emission-free ferry to the shore power system and ensures that the shore power system supplies distorted-free current to the ferry.