Abstract
The inverter-based distributed generators (IBDG) using different control strategies have different fault transient characteristics, which are the key issue of fault analysis for the distribution networks with IBDGs. To this end, this study analyzes and compares the fault transient characteristics of IBDGs using PQ control, droop control and virtual synchronous generators (VSG) control by PSCAD/EMTDC simulation, and considering the requirements of low-voltage ride through (LVRT) during grid-connected operation. The simulation results demonstrate that under the asymmetric fault condition of distribution networks, the IBDGs using different control strategies can maintain symmetric output. And when fault occurs in the distribution networks, the IBDGs using different control strategies have different transient response rate and overshoot of the output current.
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