Multi-source Coordinated Control Strategy of DC Micro-grid Based on Virtual Voltage

被引：0
|
作者：
Xie W. [1 ]
Han M. [1 ]
Wang H. [2 ]
Li R. [3 ]
Wu M. [3 ]
机构：
[1] State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source (North China Electric Power University), Changping District, Beijing
[2] School of Electric and Electronic Engineering, North China Electric Power University, Changping District, Beijing
[3] China Electric Power Research Institute, Haidian District, Beijing
来源：
| 2018年 / Chinese Society for Electrical Engineering卷 / 38期
关键词：
Autonomous decentralized control; DC micro-grid; Distributed hierarchical structure; Dynamic consistency algorithm; Multi-source coordinated control; Virtual voltage;
D O I：
10.13334/j.0258-8013.pcsee.170004
中图分类号：
学科分类号：
摘要：
With the expansion of DC micro-grid capacity, coordination control, including centralized communication control and autonomous distributed control is becoming the research hotspot. Being absolutely dependent on central control unit, centralized communication control has low reliability. Based on virtual voltage and autonomous decentralized control, a distributed hierarchical control structure for DC micro grid was designed in this paper, and corresponding control strategies were set up at each layer to realize multi-source coordinated control. The influence of line resistance on current sharing control was analyzed, and the current sharing control strategy based on virtual voltage was proposed. Furthermore, an improved dynamic consistency algorithm was proposed to dynamically track the bus voltage at the outlet side of each converter and rapidly get a consistent value. In the case of convergence, changing communication topology has no influence on the current convergence state. The dynamic consistency algorithm and the coordinated control strategy were verified by simulation and experiments. © 2018 Chin. Soc. for Elec. Eng.
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页码：1408 / 1418
页数：10
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