Voltage compensating circuits are connected serially to a power system, including capacitors each having different charging voltages (in relationship of approximately 2k (K0, 1, 2, . . . ) times the smallest charging voltage value). The voltage compensating circuits convert DC voltages in the capacitors...http://www.google.fr/patents/US6812592?utm_source=gb-gplus-shareBrevet US6812592 - Voltage fluctuation compensating apparatus
