基于MMC的虚拟同步发电机技术在船舶与岸电无缝并网中的应用  

Application of MMC-based virtual synchronous generator technology in seamless grid-connection of ships and shore power

作　　者：解文祥 周昊 郭燚[1] 王超 XIE Wenxiang;ZHOU Hao;GUO Yi;WANG Chao(Logistics Engineering College, Shanghai Maritime University, Shanghai 201306, China;No.704 Research Institute, China Shipbuilding Industry Corporation, Shanghai 200031, China)

机构地区：[1]上海海事大学物流工程学院,上海201306 [2]中国船舶集团第七〇四研究所,上海200031

出　　处：《上海海事大学学报》2021年第3期110-118,共9页Journal of Shanghai Maritime University

基　　金：上海市科技计划(20040501200);上海市科学技术委员会项目(19040501700)。

摘　　要：鉴于船舶与岸电在并网时存在较大冲击电流,以及模块化多电平换流器(modular multilevel converter,MMC)控制的岸电离网运行时对突发状况响应速度较慢的问题,采用改进的虚拟同步发电机(virtual synchronous generator,VSG)技术结合模型预测控制(model predictive control,MPC)算法,对岸电电源输出电流、环流、子模块电容电压进行分层预测控制,实现船舶与岸电的无缝并网。采用MATLAB/Simulink建立MMC-VSG并网仿真模型,模拟船舶与岸电并网及突加负载等工况。对所提出的控制策略和算法的有效性进行验证,结果表明,利用所提出的控制策略能实现VSG离网与并网的无缝切换;与经典控制方法相比,所提出的控制策略的动态响应速度提升了5倍。There exist the large impulse current when a ship connects to shore power,and the slow response speed to emergencies when shore power is in off-grid operation(where shore power is controlled by the modular multilevel converter(MMC)).To solve the problems,the improved virtual synchronous generator(VSG)technology and the model predictive control(MPC)algorithm are adopted to carry out the hierarchical predictive control of the output current,the circulating current and the sub module capacitor voltage of shore power supply,so as to realize seamless grid-connection of ships and shore power.By MATLAB/Simulink,the MMC-VSG grid-connection simulation model is built to simulate the working conditions such as the grid-connection of ships and shore power and the sudden loading.The effectiveness verification results of the proposed control strategy and algorithm show that the proposed control strategy can achieve seamless switching between VSG off-grid and grid-connection,and the dynamic response speed of the proposed control strategy is 5 times faster than that of the classical control method.

关 键 词：船舶 岸电 虚拟同步发电机(VSG) 模型预测控制(MPC) 模块化多电平换流器(MMC) 无缝切换 

分 类 号：U665.12[交通运输工程—船舶及航道工程]