Impact and location analysis of DC power flow controller on DC grid

被引：0
作者：
Li, Guoqing [1 ]
Long, Chao [1 ]
Sun, Yinfeng [1 ]
Pang, Hui [2 ]
An, Ting [2 ]
Xin, Yechun [1 ]
Qi, Lei [3 ]
机构：
[1] School of Electrical Engineering, Northeast Dianli University, Jilin, 132012, Jilin Province
[2] State Grid Smart Grid Research Institute, Changping District, Beijing
[3] School of Electrical and Electronic Engineering, North China Electric Power University, Changping District, Beijing
来源：
Dianwang Jishu/Power System Technology | 2015年 / 39卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Current sensitivity; DC grid; DC power flow controller(DCPFC); Optimal installation location; VSC;
D O I：
10.13335/j.1000-3673.pst.2015.07.004
中图分类号：
学科分类号：
摘要：
The power flow in a voltage source converter (VSC) based DC grid is determined by the resistance of each branch and the power flow control capability follows available nodes(N) minus one(N-1) rule. It means that it's difficult even impossible to ensure certain branches not overloaded if the number of branches in the DC grid are far more than N-1. The introduction of DC power flow controller can maximally guarantee that the power flows in all branches are within their ratings so as to enhance the power flow control capability of the DC grid. This paper summarized several typical topologies and their working principles of DC power flow controller. Current sensitivity analysis method was used to study the influences of the controller on DC grids. The mathematical models for power flow calculations of DC grids with the voltage source type of DC power flow controller were derived and the general expressions of current sensitivity were presented in detail. The branch currents and their sensitivity with and without the DC power flow controller were studied using the simulation software and the sensitivity analysis methodology. Based on the sensitivity study results, the methods and rules to choose optimal location for DC power flow controller were derived. Finally, a DC grid based on Zhoushan 5-terminal DC project was used to validate the rationality and effectiveness of the current sensitivity analysis method. ©, 2015, Power System Technology Press. All right reserved.
引用
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页码：1786 / 1792
页数：6
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