A Multiport Embedded DC Power Flow Controller for Modular Multilevel Converter

被引：0

作者：

Fang W. ^{[1
]}

Zhang J. ^{[1
]}

Zhou J. ^{[1
]}

Zhang Y. ^{[1
]}

Shi G. ^{[1
]}

Cai X. ^{[1
]}

机构：

[1] The key Laboratory of Control of Power Transmission and Conversion of Ministry of Education, Department of Electrical Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Minhang District, Shanghai

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2021年 / 41卷 / 07期

基金：

中国国家自然科学基金;

关键词：

DC power flow controller; Modular multilevel converter; Multi-port DC power flow control; Multi-terminal flexible DC transmission and distribution;

D O I：

10.13334/j.0258-8013.pcsee.200148

中图分类号：

学科分类号：

摘要：

In flexible DC transmission and distribution systems, DC system is convenient to solve the problem of flexible control and reliable power supply through multi-point feed-in method and multi-terminal networks. Therefore, concerns and research about ring-type and mesh-type multi-terminal flexible DC transmission and distribution technology have been greatly increased. In order to solve the problem of low control degrees of freedom in flexible DC grids, it is necessary to add DC power flow controller (DCPFC) to realize optimal power flow control, so as to relieve the congestion of transmission corridor and reduce the line loss. Specific to multi-terminal flexible DC network with modular multilevel converter (MMC), this paper presented an embedded DC power flow controller (e-DCPFC) embedded in MMC, with which power flow control capability for ring-type and mesh-type flexible DC grids at the same voltage level can be realized. The controller implemented by derivation of MMC topology has advantages of simple topology structure, convenience for multi-port extension and bipolar regulating capacity. First, the topology of e-DCPFC and its embed method in MMC were presented. Second, based on the detailed analysis of the working principle of e-DCPFC, the coordinated control strategy for e-DCPFC and MMC was proposed. Then, a simulation model was built in Matlab to verify the feasibility and effectiveness of e-DCPFC through three operating conditions. Finally, a principle sample machine of e-DCPFC was built in the lab for experimental verification. The results show that the proposed controller can achieve effective control of power flow under various working conditions. © 2021 Chin. Soc. for Elec. Eng.

引用

页码：2484 / 2494

页数：10

共 32 条

[1]

WEN Jialiang, WU Rui, PENG Chang, Et al., Analysis of DC grid prospects in China, Proceedings of the CSEE, 32, 13, pp. 7-12, (2012)

[2]

YAO Liangzhong, WU Jing, WANG Zhibing, Et al., Pattern analysis of future HVDC grid development, Proceedings of the CSEE, 34, 34, pp. 6007-6020, (2014)

[3]

TANG Guangfu, LUO Xiang, WEI Xiaoguang, Multi-terminal HVDC and DC-grid Technology, Proceedings of the CSEE, 33, 10, pp. 8-17, (2013)

[4]

SUN Wei, YAO Liangzhong, LI Yan, Et al., Study on operation control strategies of DC grid with multi-voltage level considering large offshore wind farm grid integration, Proceedings of the CSEE, 35, 4, pp. 776-785, (2015)

[5]

TANG Guangfu, HE Zhiyuan, TENG Letian, Et al., New progress on HVDC technology based on voltage source converter, Power System Technology, 32, 22, pp. 39-44, (2008)

[6]

LESNICAR A, Marquardt R., An innovative modular multilevel converter topology suitable for a wide power range, 2003 IEEE Bologna Power Tech Conference Proceedings, (2003)

[7]

ALLEBROD S, HAMERSKI R, MARQUARDT R., New transformerles, scalable modular multilevel converters for HVDC-transmission, 2008 IEEE Power Electronics Specialists Conference, pp. 174-179, (2008)

[8]

MARQUARDT R., Modular multilevel converter: an universal concept for HVDC-Networks and extended DC-bus-applications, The 2010 International Power Electronics Conference-ECCE ASIA, pp. 502-507, (2010)

[9]

VEILLEUX E, OOI B T., Power flow analysis in multi-terminal HVDC grid, 2011 IEEE/PES Power Systems Conference and Exposition, pp. 1-7, (2011)

[10]

JOVCIC D, HAJIAN M, ZHANG H, Et al., Power flow control in DC transmission grids using mechanical and semiconductor based DC/DC devices, 10th IET International Conference on AC and DC Power Transmission(ACDC 2012), pp. 1-6, (2012)

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