A Battery-Free and Noncooperative Smart Load Based on Back-to-Back Converter

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Abstract
The large-scale installation of renewable energy sources (RES) causes real-time fluctuation in the power generation of the grid, which may damage the normal operation of critical loads (CL) that are sensitive to power (voltage) variation. To address this problem, this article proposes a novel smart load (SL) consisting of CL and back-to-back (B2B) converter. The proposed SL is named as fractional-order SL (FSL), since the B2B converter inside it is equivalent to a fractional-order capacitor (FOC) component. The equivalent FOC can achieve the dual objectives of CL voltage regulation and load-side power factor (PF) correction by adjusting the order in real time to control the power compensation. In addition, the proposed FSL can achieve cooperative group operation without complex cooperative strategies, and can be plug-and-play integrated into the grid. Meanwhile, the FSL is also beneficial in reducing the energy storage demand of the grid, as it uses B2B converter that do not require energy storage batteries. Finally, the effectiveness of the proposed FSL is fully verified by experiment.
Funding Information
  • National Natural Science Foundation of China (52277177)

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