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Inrush currents due to VSR energization and overvoltages due to de-energization were determined at tap positions corresponding to lowest 80 MVAr and highest 150 MVAr reactive power.
The grid unbalanced voltage sag is emulated by changing the tap positions of three single-phase voltage regulators connected to the grid.
The other results pertaining to active-reactive dispatch schedule of generation units, optimal tap positions OLTC and optimal dispatches of the shunt capacitors are not changed.
The proposed method optimally determines the dispatch scheduling of active-reactive power of generation units, reactive power of switching capacitor, and tap positions of OLTCs for next day.
To fulfill the function of voltage regulation, the tap positions of ET's secondary winding can be adjusted through the 12 power electronic switches inside the switching control circuit.
The tap positions are set to comply with the operating condition of the summer peak season according to the load flow data of the PSS/E.
Similar(47)
Changing the tap position was infeasible.
Thus, The OLTC agent changed the tap position by +1.
Regulator will raise its tap position, if the system voltage is less than the permissible voltage and reduces its tap position if system voltage greater than permissible voltage.
The voltages were closer to the nominal voltage following the change in the tap position.
The OLTC agent determined that changing the tap position by +3 was optimal.
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