摘要
近年来,多端模块化多电平变换器(MMC)一直都是应用在柔性高压直流输电系统方面,但是近年来由于电力行业的蓬勃发展,推动了多端口MMC中压(MVDC)配电网的应用由船舶方向转向电网方向的发展。针对dq旋转坐标系为切入点展开建模,并且运用了内环电流控制和外环控制原理建立了一个MMC数学模型。在增强电力系统稳定性方面引入了最近电平逼近策略,并在最后借助于MATLAB/Simulink仿真软件构造了一个三端光伏的MMC-MVDC的系统模型.
In recent years, multi-terminal modular multilevel converter(MMC) has been applied to flexible HVDC transmission systems, but in recent years, due to the booming power industry, multi-port modular multi-level conversion has been promoted. The application of the MMC medium voltage(MVDC) distribution network has evolved from the direction of the ship to the direction of the grid. In this paper, the dq rotating coordinate system is used as the starting point to model, and an MMC mathematical model is established by using the inner loop current control and outer loop control principles. The recent level approximation strategy has been applied to improve the stability of the power system. Finally, a three-terminal photovoltaic MMC-MVDC system model was constructed based on MATLAB/Simulink simulation software.
作者
于飞
郭宏宇
王雷
Yu Fei;Guo Hongyu;Wang Lei(School of Automation and Electronic Engineering,Qingdao University of Science and Technology,Qingdao 266000,China)
出处
《电子测量技术》
2020年第8期143-148,188,共7页
Electronic Measurement Technology
关键词
多端柔性直流
内外环控制
最近电平逼近策略
光伏并网
multi-terminal flexible DC
Inner and outer ring control
recent level approximation strategy
photovoltaic grid connected
