Power Disequilibrium Suppression in Bipolar DC Distribution Grids by Using a Series-Parallel Power Flow Controller

被引：2
|
作者：
Liao, Jianquan [1 ]
Zhou, Niancheng [2 ]
Qin, Zian [3 ]
Wang, Qianggang [2 ]
Bauer, Pavol [3 ]
机构：
[1] Sichuan Univ, Sch Elect Engn, Chengdu 610065, Peoples R China
[2] Chongqing Univ, State Key Lab Power Transmiss Equipment & Syst Sec, Chongqing 400044, Peoples R China
[3] Delft Univ Technol, DCE&S Grp, Dept Elect Sustainable Energy, NL-2628 CD Delft, Netherlands
来源：
IEEE TRANSACTIONS ON POWER DELIVERY | 2023年 / 38卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Voltage control; Topology; Load modeling; Distribution networks; Power transmission lines; Mathematical models; Costs; Bipolar DC distribution network; unbalanced power; power flow controller; constant power control; UNBALANCE;
D O I：
10.1109/TPWRD.2022.3180839
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The unbalanced power between positive and negative poles in a bipolar DC distribution network (DC-DN) generates an unbalanced current at the neutral line, which enlarges the power losses of the system and the voltage deviation of DC loads. An unbalanced power suppression strategy based on a series-parallel power flow controller (SP-PFC) is proposed in this paper. The SP-PFC is adopted as the interconnection between two different DC-DNs. The topology and operating modes of SP-PFC are analyzed. Subsequently, SP-PFC output voltage and line current expressions under constant power control are derived. The nonlinear relationship between the output voltage and line current is linearized at the operating point. On this basis, the influences of unbalanced load and receiving-end voltage on the SP-PFC are investigated. A small-signal model of bipolar DC-DN containing an SP-PFC is established, and the system stability is analyzed. A simulation model of the bipolar DC distribution network containing an SP-PFC is built up in MATLAB/Simulink, and the effectiveness of the SP-PFC in the suppression of unbalanced power is verified.
引用
收藏
页码：117 / 132
页数：16
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