Operation Scenario and Coordination Control of DC Grid with DC-DC Converters

Author(s): Meiyan Wang, Ke-Jun Li*, Kaiqi Sun, Zhijie Liu

Journal Name: Recent Advances in Electrical & Electronic Engineering
Formerly Recent Patents on Electrical & Electronic Engineering

Volume 13 , Issue 3 , 2020

Become EABM
Become Reviewer
Call for Editor

Graphical Abstract:


Background: With the increasing development of voltage source converter based high voltage direct current (HVDC), it will become a reality to interconnect different DC networks into DC grid with DC-DC converters.

Methods: In this paper, three operation scenarios for the DC grid with DC-DC converters are proposed, by which the DC networks can reinforce each other with relative independence. In order to achieve the flexible switching of the proposed scenarios, the DC-DC combined control and principle of parameter selection are presented. In addition, two coordination controls for different scenarios are given to optimize the distribution of unbalanced power when the disturbances occur in the grid. With the proposed scenarios and control strategy, the impacts caused by the disturbances are alleviated and the uninterrupted operation of the grid is guaranteed.

Results: A simulation model is established on the PSCAD/EMTDC and the simulation results verify the effectiveness of the proposed operation scenarios and control strategy.

Conclusion: Finally, the effectiveness of the proposed operation scenarios and control strategy is verified by the simulation results in PSCAD/EMTDC.

Keywords: DC grid, voltage source converter based high voltage direct current (VSC-HVDC), DC-DC converter, operation scenario, coordination control, renewable energy resource.

N. Flourentzou, V.G. Agelidis, and G.D. Demetriades, "VSC-based HVDC power transmission systems: An overview", IEEE Trans. Power Electron., vol. 24, no. 3, pp. 592-602, 2009.
T.M.L. Assis, S. Kuenzel, and B.C. Pal, "Impact of multi-terminal HVDC grids on enhancing dynamic power transfer capability", IEEE Trans. Power Syst., vol. 32, no. 4, pp. 2652-2662, 2017.
Z. Wang, and Y. Wei, "Study on single-stage AC/DC conversion device based on single-cycle control", Recent Adv. Electr. Electron. Eng., vol. 9, no. 1, pp. 73-79, 2016.
E. Duran, S.Y. Litran, M.B. Ferrera, and M.S. Mesa, "DC-DC Converter with bipolar output and its use for connection of a distributed generation system to a bipolar DC grid", Recent Adv. Electr. Electron. Eng., vol. 11, no. 1, pp. 43-50, 2018.
H. Rao, "Architecture of Nan’ao multi-terminal VSC-HVDC system and its multi-functional control", CSEE J. Power Energy Syst., vol. 1, no. 1, pp. 9-18, 2015.
H. Ding, Y. Wu, Y. Zhang, Y. Ma, and R. Kuffel, "System stability analysis of Xiamen bipolar MMC-HVDC project", In: 12th IET International Conference on AC and DC Power Transmission (ACDC 2016), Beijing, China, 2016, pp. 1-6.
C.Y. Li, X.B. Hu, J. Guo, and J. Liang, "The DC grid reliability and cost evaluation with Zhoushan five-terminal HVDC case study", In: 2015 50th International Universities Power Engineering Conference (UPEC), Stoke on Trent, UK, 2015, pp. 1-6.
T. An, "A DC grid benchmark model for studies of interconnection of power systems", CSEE J. Power Energy Syst., vol. 1, no. 4, pp. 101-109, 2015.
L. Yao, W. Sun, Y. Li, B. Yang, and Y. Chi, "Operation and coordinated control for a multi-voltage-level DC grid with large offshore wind farms integrated", In: International Conference on Renewable Power Generation (RPG 2015), Beijing, China, 2015, pp. 1-6.
D. Jovcic, "Bidirectional, high-power DC Transformer", IEEE Trans. Power Deliv., vol. 24, no. 4, pp. 2276-2283, 2009.
S. Kenzelmann, A. Rufer, D. Dujic, F. Canales, and Y.R. de Novaes, "A versatile DC/DC converter based on modular multilevel converter for energy collection and distribution", In: IET Conference on Renewable Power Generation, Birmingham, UK, 2011, pp. 1-6.
D. Jovcic, and L. Zhang, "LCL DC/DC Converter for DC Grids", IEEE Trans. Power Deliv., vol. 28, no. 4, pp. 2071-2079, 2013.
J.D. Paez, D. Frey, J. Maneiro, S. Bacha, and P. Dworakowski, "Overview of DC-DC Converters dedicated to HVdc Grids", IEEE Trans. Power Deliv., vol. 34, no. 1, pp. 119-128, 2019.
A. Schön, and M.M. Bakran, "A new HVDC-DC converter with inherent fault clearing capability", In: 2013 15th European Conference on Power Electronics and Applications (EPE), Lille, France, 2013, pp. 1-10.
W. Lin, and D. Jovcic, "Power balancing and DC fault ride through in DC grids with DC hubs and wind farms", IET Renew. Power Gener., vol. 9, no. 7, pp. 847-856, 2015.
L.Z. Yao, S.Y. Lu, and J.Y. Wen, "Topology and control of DC grid with DC-DC converters", Dianli Xitong Zidonghua, vol. 40, no. 11, pp. 80-86, 2016.
W. Sun, L.Z. Yao, and Y. Li, "Study on operation control strategies of DC grid with multi-voltage level considering large offshore wind farm grid integration", Zhongguo Dianji Gongcheng Xuebao, vol. 35, no. 4, pp. 776-785, 2015.
K. Sun, "Operation modes and combination control for urban multivoltage-level DC grid", IEEE Trans. Power Deliv., vol. 33, no. 1, pp. 360-370, 2018.
N.R. Chaudhuri, and B. Chaudhuri, "Adaptive droop control for effective power sharing in multi-terminal DC (MTDC) grids", In: 2013 IEEE Power & Energy Society General Meeting, 2013, pp. 1-1.
Z.D. Wang, "A coordination control strategy of voltage-source converter-based MTDC for offshore wind farms", IEEE Trans. Ind. Appl., vol. 51, no. 4, pp. 2743-2752, 2015.
W.G. Cigre, "B4.41: Systems with multiple DC Infeed, CIGRE, Technical Brochure, 2008",
Y. Liu, and Z. Chen, "A flexible power control method of VSC-HVDC link for the enhancement of effective short-circuit ratio in a hybrid multi-infeed HVDC System", IEEE Trans. Power Syst., vol. 28, no. 2, pp. 1568-1581, 2013.

Rights & PermissionsPrintExport Cite as

Article Details

Year: 2020
Published on: 28 November, 2018
Page: [369 - 377]
Pages: 9
DOI: 10.2174/2352096512666181129115540
Price: $25

Article Metrics

PDF: 8