A power and voltage regulation circuit adapted to respond to changes in quality of a phase of AC input line power and create an adjusted AC power wave to be applied to an AC load or to boost the voltage of said AC input line power, including a source of DC power (23, 24) having a positive DC power output and a negative DC power output; and the load having first and second AC load terminals; the power and voltage regulation circuit comprising: a circuit connecting to the AC line power, having a first AC power conductor and a second AC power conductor; a regulator stage having first and second power capacitors (C 1, C 2) each having a first electrode connected to the first AC power conductor and a second electrode, an electronic switch array (Q 1, Q 2, Q 3, Q 4) having a power input connected to the second AC power conductor, power electrodes coupled respectively to the second electrodes of said first and second power capacitors (C 1, C 2), and output terminals connected to said first and second AC load terminals (11, 12), respectively with said second AC load terminal being at the potential of said second AC power conductor; positive and negative DC conductors connected to the positive and negative power outputs of said source of DC power; and characterised in that: the source of DC power (23, 24) is not supplied by said AC line power; and in that the power and voltage regulation circuit further comprises circuitry (Q 7, Q 8) connected between said positive and negative DC conductors (21, 22) and to the second electrodes of said first and second power capacitors (C 1, C 2), respectively, for charging said power capacitors (C 1, C 2), respectively, during respective opposite half cycles when the voltage of the input line power is at or below a predetermined voltage level, thereby placing DC offsets into the respective half-cycles of the power applied to said AC load. a circuit connecting to the AC line power, having a first AC power conductor and a second AC power conductor; a regulator stage having first and second power capacitors (C 1, C 2) each having a first electrode connected to the first AC power conductor and a second electrode, an electronic switch array (Q 1, Q 2, Q 3, Q 4) having a power input connected to the second AC power conductor, power electrodes coupled respectively to the second electrodes of said first and second power capacitors (C 1, C 2), and output terminals connected to said first and second AC load terminals (11, 12), respectively with said second AC load terminal being at the potential of said second AC power conductor; positive and negative DC conductors connected to the positive and negative power outputs of said source of DC power; and characterised in that: the source of DC power (23, 24) is not supplied by said AC line power; and in that the power and voltage regulation circuit further comprises circuitry (Q 7, Q 8) connected between said positive and negative DC conductors (21, 22) and to the second electrodes of said first and second power capacitors (C 1, C 2), respectively, for charging said power capacitors (C 1, C 2), respectively, during respective opposite half cycles when the voltage of the input line power is at or below a predetermined voltage level, thereby placing DC offsets into the respective half-cycles of the power applied to said AC load. the source of DC power (23, 24) is not supplied by said AC line power; and in that the power and voltage regulation circuit further comprises circuitry (Q 7, Q 8) connected between said positive and negative DC conductors (21, 22) and to the second electrodes of said first and second power capacitors (C 1, C 2), respectively, for charging said power capacitors (C 1, C 2), respectively, during respective opposite half cycles when the voltage of the input line power is at or below a predetermined voltage level, thereby placing DC offsets into the respective half-cycles of the power applied to said AC load.