Patent ID: 6985370

Claim:
A circuit for correcting perturbations in a power system signal operating at a system line frequency said circuit comprising: at least one capacitive element for drawing a capacitive current; at least one inductive element for drawing an inductive current substantially equal in amplitude and substantially one hundred eighty degrees out of phase with said capacitive current; said at least one inductive element connected in parallel with said at least one capacitive element to form a parallel resonant circuit; said parallel resonant circuit is tuned to resonate at said system line frequency and is connected in parallel directly across a power source with no intervening electrical components between said power source and said parallel resonant circuit; said parallel resonant circuit has circulating currents of substantially the same amplitude as a load current, wherein said parallel resonant circuit absorbs voltage perturbations in excess of the amplitude of said power system signal at all frequencies above and below said system line frequency and wherein said parallel resonant circuit provides energy to restore notches in the amplitude of said power system signal at all frequencies above and below said system line frequency.