Abstract:
The multimode operation of a photovoltaic (PV) array, battery, grid, and diesel generator (DG) set-based charging station (CS) for continuous charging and uninterruptible household loads is discussed in this article.
This CS uses a single voltage source converter to manage power among different energy sources and charge electric vehicles (EVs), extract maximum power from the PV array, regulate generator voltage and frequency, compensate harmonics current of nonlinear loads, and compensate intentional reactive power.
Charging station (CS) control uses PV array and storage battery electricity. After these two sources fail, the charging station uses the grid and a squirrel cage induction generator-based DG set. The DG set is controlled to generate up to 33% more power than its rated capacity without exceeding the rated current in windings, reducing its size.
The generator’s voltage and frequency are regulated at their rated values without a mechanical speed governor. In all working modes, the CS meets IEEE 1547 and has less than 5% voltage and current harmonic distortion.
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