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The Steady-state Analysis of DC Distribution Network Embedded Droop Control and Power Flow Controller

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Abstract

Aiming at the DC distribution network based on the droop control, this paper proposes that the intersection of the internal characteristics of the node converter droop control and the external characteristics derived from the parameters of the DC distribution network is the actual node operation point. The quantitative relationship between the droop control characteristic parameters and the converter functions is discussed, and the comprehensive droop control characteristics of the multi-converter node is analyzed. The automatic adjustment method of droop control, containing the secondary adjustment and the third adjustment, is presented, and the power flow algorithm of DC distribution network, which considers the impact of power flow controller, droop control and automatic adjustment method, is derived. Finally, three cases about power flow controller, the secondary adjustment and the third adjustment are used to verify that droop control and its related regulation methods can optimize the operation conditions of DC distribution network.

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Acknowledgements

The funding has been recevied from National High Technology Research and Development Program 863 of China with Grand No. 2015AA050103.

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Authors and Affiliations

  1. Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai, China

    Da Xie & Luqing Zhang

  2. Department of Electronic and Electrical Engineering, University of Bath, Bath, UK

    Chenghong Gu

  3. China Southern Power Grid Research Institute, Guangzhou, China

    Yan Li

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  1. Da Xie
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  2. Luqing Zhang
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  3. Chenghong Gu
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  4. Yan Li
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Correspondence to Da Xie.

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Appendix

Appendix

See Fig. 11 and Tables 2 and 3.

Fig. 11
figure 11

The control block diagram of automatic adjustment

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Table 2 The parameter of the DC distribution network
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Table 3 The list of symbols used
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Xie, D., Zhang, L., Gu, C. et al. The Steady-state Analysis of DC Distribution Network Embedded Droop Control and Power Flow Controller. J. Electr. Eng. Technol. 14, 2225–2238 (2019). https://doi.org/10.1007/s42835-019-00240-8

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