Generation-Storage Coordination Control in DC Microgrids

Xia, Yanghong; Liu, Jianing; Yu, Miao; Wei, Wei; Peng, Yonggang; Zhu, Jie; Yu, Xijuan

doi:10.1109/pesgm.2018.8586097

Cited by 1 publication

(1 citation statement)

References 7 publications

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v_{d c}^{r e f} = V_{d c}^{*} - k_{d c} (p_{d c} - P_{d c}^{*})

where

v_{d c}^{r e f}

represents the reference output voltage of ESS,

V_{d c}^{*}

and

P_{d c}^{*}

represents the rated output voltage and the rated output power,

k_{d c}

represents the droop coefficient,

p_{d c}

represents the actual output power. The control strategy of ESS in DC microgrid has been widely analyzed and is not the focus of this paper, and the voltage of DC microgrid is almost equal to the reference output of ESS [24].…”

Section: Seamless Switching Power Sharing Controlmentioning

confidence: 99%

Seamless switching power sharing control method in a hybrid DC‐AC microgrid by the isolated two‐stage converter based on SST

Peng

Wang

2021

IET Power Electronics

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To facilitate the application of various renewable generations as well as diversified loads, hybrid DC/AC microgrids have aroused widespread interest; however, direct access of different types of sources and loads to the utility through multiple converters may be inefficient. In addition, with the complexity growth of the system, the stable and efficient operation puts forward new requirements for the isolation protection and more intelligent control. Facing these problems, the isolated two-stage converter topology based on solid state transformer (SST) is designed and the automatic seamless switching power sharing control strategy is proposed. The proposed topology replaces the conventional passive transformer with dual-active-bridge converter (DABC) to realize voltage matching and galvanic isolation for higher controllability and less volume occupation. Constant ratio control method is adopted for DABC to operate as an ideal DC transformer. Further, AC frequency and DC voltage are measured as characterizations of power level to adjust the transferred power of the converter. Through the non-directional strategy, bidirectional power support and decentralized cooperation are realized, and the capacity and sensitivity of microgrids are considered. The stability of the proposed control strategy is analyzed and the feasibility is verified by several real-time hardware-in-loop experiments.

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