A Two-Layer Active Power Control Scheme in a DC Grid for Contingency Situation

被引：0
作者：
Li, Yujun [1 ]
Xu, Zhao [2 ]
机构：
[1] Xi An Jiao Tong Univ, Dept Elect Engn, Xian 710049, Shannxi, Peoples R China
[2] Hong Kong Polytech Univ, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R China
来源：
2017 IEEE CONFERENCE ON ENERGY INTERNET AND ENERGY SYSTEM INTEGRATION (EI2) | 2017年
关键词：
Energy Internet; DC droop; power flow; Contingency situation; VSC-HVDC; FLOW;
D O I：
暂无
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
A two-stage active power control scheme by droop-controlled DC grids for energy internet system when one converter is out of operation is proposed in this paper. In the first layer, the DC-link voltage of each DC terminal is analytically deduced according to the analytical power flow model in a meshed DC grid to make sure power support during the contingency situation. However, in the second layer, it can alter the concerned control parameters including the power set points and DC droops based on the DC-link voltage calculated in the former layer. The proposed hierarchical scheme can fast track the power change during the contingency situation such as loss of one converter. A typical four-terminal DC grid was modeled and verified in the DIgSILENT/PowerFactory to illustrate the twolaryer scheme.
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页数：4
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