Rapid Reversal of San Luis Pumping - Generating Units

The changeover of a reversible pump?generating unit from full-load pumping to full-load generating has been accomplished in the unusually short time of 27 seconds. Comparison of this mode of operation, called rapid reversal, to more usual operations is made and control details are outlined. Application of this mode of operation can improve the contribution of a pumping?generating plant during power system emergencies.