Patent ID: 7701087

Claim:
A method for supplying electrical power to a load which is normally connected to an electrical grid, the method comprising: (1) using a control system which is operatively coupled to: the grid, a power storage unit, a static compensation device, and a generator set to determine the characteristics of electrical power supplied by the grid; and (2) based on the determined characteristics, supplying power of predetermined proper characteristics to the load through at least one of a plurality of modes of operation selected by the control system, including a standby mode in which static-compensated power from the grid is supplied to the load, an alternative power source mode in which the generator set, which is independent of the electrical grid, is coupled to the load, and a discharge mode in which the power storage unit is coupled to the load; wherein the power supplied to the load is continuously under either current control or voltage control, the type of control being determined by the control system based upon which mode is active.