新能源动力船舶中逆变器下垂控制技术

针对船舶电力系统大负载、强耦合特点，应用陆上大电网并网逆变理论，研究新能源动力船舶供电系统中与同步发电机并联的逆变器下垂控制技术能否满足船舶电网要求。分析了逆变器拓扑结构，建立了数学模型，在此基础上确定由电压环、电流环和功率环组成的三环控制策略，并提出了控制器参数的设计方法。仿真结果表明，基于下垂控制技术的逆变器与同步发电机并联构成的供电系统，能够满足船舶的用电需求，可实现新能源动力船舶在负载波动工况下稳定运行。

Inverter with Droop Control in New Energy Powered Vessel

Based on the characteristics of heavy load and strong coupling of power system on ships and the application of the theory of grid-connected on land,whether the droop control strategy on inverter,which was paralleled with synchronous generator on supply system of new energy ship,can meet the requirements of the ship power grid.was investigated in this paper.The three-loop control strategy which was composed of voltage loop,current loop and power loop and the setting method of the controller method was determined by the analysis of circuit topology,and the mathematical model of the inverter.The results from simulation show that the electrical system,which was composed of inverter with droop control strategy and synchronous generator can meet the power quality of ship.It notes that this electrical system can make the new energy powered ship keep high stable in the load fluctuation.