Patent ID: 7362600

Claim:
A method usable in a power transformation system that can provide power from an AC source to an AC load, the method comprising: determining a frequency of a signal indicative of power supplied from the AC source; determining a frequency of a signal indicative of power supplied to the AC load; obtaining an error value based on a difference between the determined AC source and AC load frequencies; performing frequency scaling on the error value to obtain a first signal; dividing the first signal by a second signal indicative of a period of time during which compensation is to be performed, and obtaining a resulting third signal from the division; providing the third signal as an input to a ramping operation; providing a fourth signal as another input to the ramping operation, and obtaining a fifth signal as an output of the ramping operation; and summing the fifth and third signals to obtain a sixth signal usable to control a change in the AC load frequency; and compensating for the difference by changing the AC load frequency if the error value exceeds a first predetermined value and deactivating compensation if the error value drops below a second predetermined value.