Photovoltaic (PV) system is turning into an ideal secondary power source for marine ships because of the ability to trap nature’s green energy. In this paper, a ship’s power grid connected PV system is proposed. The proposed system will help to inject the active power into the ship’s electric power grid together with a protection scheme, which will prevent the PV system and ship’s power grid from different faulty conditions. The proposed system has facility to track the maximum power point (MPP) of PV array by means of hybrid MPPT method and flyback DC-DC converter. Space vector pulse width modulation (SVPWM) technique controlled 3-phase full-bridge VSI is used to convert DC bus voltage into useful 3-phase AC output in order to feed the local load and transmit excess AC power into the ship’s bus. Furthermore, an isolation transformer is used to provide galvanic isolation amid PV system and ship’s power grid.

中文翻译：

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一种改进的光伏系统，具有自动保护功能，可将有功功率注入船用电网

由于具有捕获自然绿色能源的能力，光伏（PV）系统正成为海上船舶的理想辅助电源。本文提出了舰船并网光伏发电系统。拟议的系统将有助于将有功功率与保护方案一起注入到船舶的电网中，这将防止PV系统和船舶的电网出现不同的故障情况。拟议的系统具有通过混合MPPT方法和反激式DC-DC转换器跟踪PV阵列的最大功率点（MPP）的功能。空间矢量脉冲宽度调制（SVPWM）技术控制的三相全桥VSI用于将直流母线电压转换为有用的三相交流输出，以便为本地负载供电并将多余的交流电传输到船舶的总线中。此外，