Symmetrical modular-multi-level DC/DC converter for DC grid

被引：0
|
作者：
Gao Y. [1 ]
Si W. [2 ]
Wei X. [1 ,3 ,4 ]
Zhao Y. [1 ,4 ]
Wang X. [1 ]
机构：
[1] Global Energy Interconnection Research Institute, Beijing
[2] State Grid, Beijing
[3] Beijing Key Laboratory of High Power Electronics, Beijing
[4] State Key Laboratory of Advanced Power Transmission Technology, Beijing
来源：
Gaodianya Jishu/High Voltage Engineering | 2016年 / 42卷 / 10期
关键词：
Bi-directional power flow; DC grid; DC transformer; DC/DC converter; MMC;
D O I：
10.13336/j.1003-6520.hve.20160926014
中图分类号：
学科分类号：
摘要：
In order to meet the needs of different levels of DC voltage interconnection in DC power grid, we proposed a modular-multilevel(MMC) DC/DC converter. Firstly, we introduced the converter topology. Secondly, in accordance with the two conditions of DC/DC converter and the normal operation and the system fault, we analyzed the working principle and fault characteristics of the topology, respectively. Thirdly, we proposed the strategies of the prevention and protection of the topology, which could ensure the DC/DC converter's stable operation and fault isolation function. Finally, simulation research was carried out by the Matlab-simulink software to verify the working principle of the topology and control strategy proposed. The results show that the topology can be deployed to inter-connecter DC grid of different voltage levels, especially the application of renew energy access. Its key features include: step-up and step-down operation, bi-directional power flow, and bi-directional fault blocking. Compared with the existing topology, the topology has the characteristics of less number of components and modules, simple circuit, low cost, and small footprint, thus it has a significant advantage in the interconnection of DC grid. © 2016, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：3133 / 3138
页数：5
相关论文
共 18 条
  • [1] Ma W., Wu F., Yang Y., Et al., Flexible HVDC transmission technology's today and tomorrow, High Voltage Engineering, 40, 8, pp. 2429-2439, (2014)
  • [2] Li Y., Jiang W., Yu S., Et al., System design of Zhoushan multi-terminal VSC-HVDC transmission project, High Voltage Engineering, 40, 8, pp. 2490-2496, (2014)
  • [3] Chen W., Huang A.Q., Li C., Et al., Analysis and comparison of medium voltage high power DC/DC converters for offshore wind energy systems, IEEE Transactions on Power Electronics, 28, 4, pp. 2014-2023, (2013)
  • [4] Bialek J.W., European offshore power grid demonstration projects, 2012 IEEE Power and Energy Society General Meeting, pp. 1-6, (2012)
  • [5] Das D., Pan J., Bala S., HVDC light for large offshore wind farm integration, 2012 IEEE Power Electronics and Machines in Wind Applications, pp. 1-7, (2012)
  • [6] Robinson J., Jovcic D., Joos G., Analysis and design of an offshore wind farm using a MV DC grid, IEEE Transactions on Power Delivery, 25, 4, pp. 2164-2173, (2010)
  • [7] Meyer C., Hoing M., Peterson A., Et al., Control and design of DC grids for offshore wind farms, IEEE Transactions on Industry Applications, 43, 6, pp. 1475-1482, (2007)
  • [8] Fairley P., Germany jump-starts the supergrid, IEEE Spectrum, 50, 5, pp. 36-41, (2013)
  • [9] Ludois D., Venkataramanan G., An examination of AC/HVDC power circuits for interconnecting bulk wind generation with the electric grid, Energies, 3, 6, pp. 1263-1289, (2010)
  • [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, pp. 1-6, (2012)
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