This paper analyzes the factors influencing the recovery process of a particular micro-grid (MG) following a short-circuit. The MG is supplied by a classical synchronous generator (SG), which performs the MG voltage regulation through its excitation system and by an induction generator (IG). The MG frequency is kept at a constant value by the use of dump load circuit (DL). Simulations are carried out in order to investigate the recovery process after a fault that appeared in the MG has been cleared.
This paper deals with the voltage and frequency control of an autonomous induction generator (IG). In order to do that, a voltage source inverter (VSI) with a dump load (DL) circuit on its DC side is employed. The IG frequency is controlled by keeping constant the VSI synchronous frequency. For the IG voltage regulation two cascaded regulators are used, which have as reference the line voltage and the VSI DC voltage, respectively. Simulations and experiments are carried out in order to investigate the reliability of such configuration when supplying static and dynamic loads.
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