A Novel P-Q Control Structure for Interleaved Full Bridge Converter in a Multifunctional Single-Phase AC Battery Application

Tuan Anh Do, Quang Dich Nguyen, Phuong Vu

Abstract


Recently, the home battery has been of research interest as a sustainable energy storage system for solar self-consumption, time-based control, and backup. This research focuses on the fully integrated AC Battery, a typical product of a home battery with AC-coupled topology consisting commonly of two-stage power energy conversion. Firstly, the Interleaved Full Bridge ( IFB) converter is proposed for the Power Factor Correction stage in the single-phase system based on its outstanding advantages of reduced current stress and lower output current ripple. Secondly, one of the important tasks of a multi-functional AC Battery is the ability to control the active and reactive power independently, supporting the grid to supply power to the domestic load. Therefore, this paper proposed a single-phase PQ control scheme for the IFB converter to achieve this task while the power from the battery through the DC/DC stage is considered an adjustable current source. Thirdly, the orthogonal current generated by a fictive-axis emulator is applied for the proposed control structure for the IFB converter, which improves the dynamic response of the current regulator and the overall system. To quickly verify the advantages of the IFB converter and the proposed control structure, real-time simulation using the Typhoon HIL platform is conducted in several scenarios: active power compensation, power factor compensation, and Point of Common Coupling ( PCC) voltage regulation. The simulation results validate the effectiveness of the control structure for the proposed converter in an AC Battery application

Keywords


Multi-functional single-phase AC Battery, Power Factor Correction stage, Interleaved Full Bridge converter, PQ control, Fictive-Axis Emulator

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References


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DOI (PDF): https://doi.org/10.20508/ijrer.v16i1.15164.g9169

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