扩展P-ROQR环流抑制策略在船舶MMC-MVDC电力系统中的应用
Application of Extended P-ROQR Circulation Suppression Strategy in Ship MMC-MVDC Power System
郭燚 1万思鹏1
作者信息
- 1. 上海海事大学物流工程学院,上海 201306
- 折叠
摘要
为了解决船舶中压直流(MVDC)电力系统中应用的模块化多电平变换器(MMC)存在的环流问题,分析自阻型MMC的拓扑结构及环流产生机理,采用基于2阶广义积分器(SOGI)的滤波器过滤环流中的直流分量.对于环流中的交流分量,提出一种基于比例降阶准比例谐振控制器的新型环流抑制器对其进行抑制.在MATLAB/Simulink软件中搭建船舶自阻型MMC-MVDC电力系统模型.仿真结果表明:所提策略能有效抑制环流中的交流分量;自阻型MMC应用于逆变侧时具有直流故障闭锁能力.所提策略应用于船舶MMC-MVDC电力系统的环流抑制效果优异,同时具有减少桥臂电流畸变,稳定子模块电容电压的作用.
Abstract
To address the circulating current issues in the modular multilevel converter(MMC)used in medium voltage direct current(MVDC)power systems on ships.The topology and circulating current generation mechanism of the self-blocking MMC are analyzed.A filter based on second-order generalized integrator(SOGI)is used to filter out the DC component in the circulating current.For the AC component in the circulating current,a new circulating current suppressor based on proportional order reduced quasi-resonant(P-ROQR)controller is proposed.A ship-based self-blocking MMC-MVDC power system model is built using MATLAB/Simulink software.Simulation results show that the proposed strategy can effectively suppress the AC component in the circulating current.Moreover,the self-blocking MMC exhibits DC fault blocking capability when applied on the inverter side.The circulating current suppression strategy presented here demonstrates excellent performance in ship-based MMC-MVDC power systems.It also helps reduce bridge arm current distortion and stabilize submodule capacitor voltage.
关键词
船舶中压直流电力系统/模块化多电平变换器/环流抑制/比例降阶准谐振Key words
ship medium voltage direct current(MVDC)power system/modular multilevel converter(MMC)/circulating current suppression/proportional reduced order quasi-resonant引用本文复制引用
出版年
2024
NETL
NSTL
万方数据