Voltage control of common capacitor and self-faults analysis of DC current flow controllers for meshed multi-terminal HVDC grids

被引：3
|
作者：
Wang, Puyu [1 ]
Liu, Pengcheng [1 ]
Jiang, Ningqiang [1 ]
Zhang, Xiao-Ping [2 ]
Feng, Shihua [1 ]
Xiang, Zhengrong [1 ]
机构：
[1] Nanjing Univ Sci & Technol, Sch Automat, Nanjing 210094, Jiangsu, Peoples R China
[2] Univ Birmingham, Sch Engn, Birmingham B15 2TT, W Midlands, England
来源：
ENERGY REPORTS | 2022年 / 8卷
基金：
中国博士后科学基金;
关键词：
DC current flow controller (DC CFC); Self-fault analysis; Capacitor voltage control; Simplified topology; STABILITY ANALYSIS;
D O I：
10.1016/j.egyr.2021.11.210
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：
In this paper, the control methodology of the common capacitor voltage and the DC current flow controller (DC CFC) under self-fault conditions are investigated with the following two contributions. (1) A selection method of the common capacitor voltage based on various specific control requirements with explicit control margins of the DC line currents is proposed with analytic derivations of two-line/three-line DC CFCs in the meshed three-terminal/four-terminal high-voltage direct current grids (HVDC), respectively. (2) The impact of different self-faults of the DC CFC on the control performance of the DC line currents is analyzed with a simplified topology with unidirectional current flow presented. Case studies are conducted in the time-domain simulation environment PSCAD/EMTDC and the results justify the effectiveness of the theoretical analysis. The proposed common capacitor voltage control method and self-fault analysis would be useful for practical applications of the DC CFC under both steady and transient states. (C) 2021 The Author(s). Published by Elsevier Ltd.
引用
收藏
页码：752 / 761
页数：10
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