直流电网潮流分析与控制研究综述

Review on DC Grids Power Flow Analysis and Control

近年来,基于电压源型换流器的直流电网技术发展迅速,成为相关领域的研究热点。潮流问题是电力系统分析中最基本的问题,对直流电网潮流分析与控制技术的研究也是直流电网研究中最重要的基础。首先归纳总结了直流电网的潮流计算和最优潮流计算的方法,并对2者的收敛性和计算效率进行了讨论;在此基础上,针对直流电网潮流控制自由度不足的问题,从系统级控制和直流潮流控制器2个方面,概述了对直流电网潮流进行控制的方法,并对控制效果和经济性做出了评述;最后,对直流电网潮流分析与控制技术的发展趋势和关键问题进行了总结与展望。

In recent years, the technology of DC power system based on voltage source converter has developed rapidly and become a hot research topic. The power flow problem is the most basic in power system analysis, and the research on the power flow analysis and control technology of DC grids is the most important foundation in the research of DC grids. Firstly, we summarize the methods of DC power flow and optimal power flow calculation, and discussed convergence and computational efficiency of both methods. Secondly, aiming at the shortage problem of DC grid power flow control de- grees of freedom, from two aspects of system level control and DC power flow controller, we summarize the method control of DC power flow, and discuss the control effect and economy. Finally, we summarize and prospect the develop- ment trends and key issues of analysis and control technology of DC power flow.