Chinese Journal on Internet of Things ›› 2020, Vol. 4 ›› Issue (4): 32-42.doi: 10.11959/j.issn.2096-3750.2020.00197

• Topic:IoT+Energy • Previous Articles     Next Articles

Research on the control strategy of multi-port DC/DC energy router for the energy Internet

Wenzhong MA1,Guancheng LI1,Kuitong ZHANG2,Shujuan YANG3,Mengdi WEI1,Yuzhen TANG1,Yucheng SONG4,Lei DONG1()   

  1. 1 College of New Energy,China University of Petroleum,Qingdao 266580,China
    2 Yankuang Group Co.,Ltd.,Zoucheng 273500,China
    3 Shandong Transport Vocational College,Weifang 261100,China
    4 College of Science,China University of Petroleum,Qingdao 266580,China
  • Revised:2020-09-24 Online:2020-12-30 Published:2020-12-14
  • Supported by:
    The Natural Science Foundation of Shandong Province(ZR2018MEE040);The Natural Science Foundation of Shandong Province(ZR2019MEE094)

Abstract:

The characteristics and shortcomings of the current multi-port direct current (DC) to DC (DC/DC) energy router were analyzed.A multi-port DC/DC energy router for the energy Internet was optimized and designed.Through the analysis of the operating voltage requirements under different working conditions,the full-bridge proportional design of the sub-module was proposed.On this basis,an alternating current (AC) to DC (AC/DC) decoupling control strategy to realize riding through the DC fault without de-blocking any devices was proposed.The multi-port DC/DC energy router was used to realize the interconnection of multiple DC power grids with different voltage levels.It not only retained the advantages of low cost and low loss of the traditional DC autotransformer,but also effectively improved the shortcomings that the DC autotransformer cannot ride through the DC fault.Finally,the simulation test was carried out in the MATLAB/Simulink environment to verify the stability of the technology in the normal operation,the feasibility of suppressing the DC fault and the effectiveness of the control strategy.

Key words: energy Internet, energy router, DC autotransformer, DC fault

CLC Number: 

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