Generalised grid-forming VSC control for grid connection and island network

Lu, Yuan and Xu, Lie; (2020) Generalised grid-forming VSC control for grid connection and island network. In: The 10th International Conference on Power Electronics, Machines and Drives (PEMD 2020). IET, GBR, pp. 832-837. ISBN 9781839535420 (https://doi.org/10.1049/icp.2021.1173)

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Abstract

This study proposes a generalised grid-forming VSC control for grid connection and island network for distributed generations. The proposed control scheme is based on grid-forming direct voltage control to establish the AC voltage and frequency for island network, while it works as a controlled AC voltage source to regulate the active and reactive power flowing to the local load and AC grid during grid-connected operation. Strategy for fault current limiting is also proposed to overcome the overcurrent problem brought by the grid-forming direct voltage control. Simulation results during three-phase AC fault and transition from grid-connected operation to islanding operation are presented to confirm the feasibility and effectiveness of the proposed control strategy.

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