Research on Low Voltage Ride through Control of a Marine Photovoltaic Grid-Connected System Based on a Super Capacitor

With the increase of photovoltaic penetration rate, fluctuation power generation affects reliability ship grids. Marine PV grid-connected systems with high rates should generally have a low voltage ride-through capability. In present paper, strategy in which super capacitors are applied for energy storage marine system is proposed, and an inverter adopts independent decoupling control active reactive currents to improve LVRT capability systems. addition, comprehensive also designed supercapacitor, regulate through method outer loop current inner loop, order maintain DC bus stability. At same time, can output support grid voltage. The advantage this smoothing imbalance short enhancing system, improving quality, ensuring safety stability ship’s grid. MATLAB/Simulink were employed establish ro-ro capacitor–marine model carry out simulation experiments by setting drop. results show that when drops, adjusts distribution power. factor drops from 1 0.77, effective value drop increases 150 V 156 V, proves effectively reduces depth improves system.