Abstract: A system for transforming the voltage of AC electrical energy by resonant charge exchange between a first node and a second node. The system includes a capacitor or series-connected column of capacitors and a controller that is configured to cause the system to repetitively conduct a primary charge exchange by resonantly exchanging energy between the capacitor or the series-connected column of capacitors and the first node, and then electrically isolate the capacitor or the series-connected column of capacitors. During the electrical isolation the system can electrically reconfigure the series-connected column of capacitors. The system then conducts a secondary charge exchange by resonantly exchanging energy between the capacitor or the reconfigured series-connected column of capacitors and the second node.

Abstract: A power transformation system that is constructed and arranged to transform power from one or more primary voltage nodes to a separate secondary voltage node using one or more columns comprised of a plurality of capacitive modules each of which is capable of being either electrically inserted into the column or electrically isolated and electrically bypassed. There is a secondary voltage node, at a non-ground potential, to which a first end of the column is electrically connected. In the two-primary node example there are two high voltage switches, each in series with a reactor; one high-voltage switch adapted to electrically connect a second end of the column to the first primary voltage node and the other high-voltage switch adapted to electrically connect the second end of the column to a second primary node.

Abstract: A power transformation system that is constructed and arranged to transform power from one or more primary voltage nodes to a separate secondary voltage node using one or more columns comprised of a plurality of capacitive modules each of which is capable of being either electrically inserted into the column or electrically isolated and electrically bypassed. There is a secondary voltage node, at a non-ground potential, to which a first end of the column is electrically connected. In the two-primary node example there are two high voltage switches, each in series with a reactor; one high-voltage switch adapted to electrically connect a second end of the column to the first primary voltage node and the other high-voltage switch adapted to electrically connect the second end of the column to a second primary node.

Abstract: A transformation system capable of efficiently transforming electrical power from one dc voltage to one or more other dc voltages or of regulating power flow within a network of constant nominal voltage; in each case without intermediate magnetic transformation. The transformation system is based on periodic and resonant delivery of charge from the first of two dc nodes to a system of capacitors, electrical reconfiguration of those capacitors, then delivery of power to one or more other dc nodes.

Abstract: A transformation system capable of efficiently transforming electrical power from one dc voltage to a second dc voltage or of regulating power flow within a network of constant nominal voltage; in each case without intermediate magnetic transformation. The transformation system is based on periodic and resonant delivery of charge from the first of two dc nodes to a system of capacitors, electrical reconfiguration of those capacitors, then delivery of power to a second dc node.

Abstract: transformation system capable of efficiently transforming electrical power from one dc voltage to one or more other dc voltages or of regulating power flow within a network of constant nominal voltage; in each case without intermediate magnetic transformation. The transformation system is based on periodic and resonant delivery of charge from the first of two dc nodes to a system of capacitors, electrical reconfiguration of those capacitors, then delivery of power to one or more other dc nodes.

Abstract: A high voltage transformer for transforming electric power from a high voltage direct current source to a lower voltage direct current or to a lower voltage alternating current, without intermediate magnetic transformation. The transformer has a number of stages. Each stage includes capacitors and switching devices. There is a controller that controls the switching devices to change the polarity of one or more capacitors.

Abstract: A transformation system capable of efficiently transforming electrical power from one dc voltage to a second dc voltage or of regulating power flow within a network of constant nominal voltage; in each case without intermediate magnetic transformation. The transformation system is based on periodic and resonant delivery of charge from the first of two dc nodes to a system of capacitors, electrical reconfiguration of those capacitors, then delivery of power to a second dc node.

Abstract: A method for transforming electric power from high voltage AC voltage and AC current to high voltage DC voltage and DC current and from high voltage DC voltage and DC current to high voltage AC voltage and AC current. The method includes passing the power through voltage sourced converters whose legs are comprised all or in part with 3 step ladder bridge modules connected in series.

Abstract: A high voltage transformer for transforming electric power from a high voltage direct current source to a lower voltage direct current or to a lower voltage alternating current, without intermediate magnetic transformation. The transformer has a number of stages. Each stage includes capacitors and switching devices. There is a controller that controls the switching devices to change the polarity of one or more capacitors.

Abstract: A system including associated equipment for transmitting radio-frequency power line carrier signals on high voltage ac or dc transmission lines within a multi-conductor bundle, one path for which is provided by one or more conductors located at the center of the bundle, and the other by the remaining conductors connected in electrical parallel and arrayed in a generally circular pattern around the center. Insulated conductor spacers hold the conductors in their symmetrical configuration and insulate the center conductor, allowing it to serve as a radio frequency path similar to that in a conventional coaxial cable. The system provides low attention, low vulnerability to external noise and low radiation of the carrier signal while providing redundant channels—three for ac transmission lines and two for bipolar dc transmission lines.

Abstract: A system including associated equipment for transmitting radio-frequency power line carrier signals on high voltage ac or dc transmission lines within a multi-conductor bundle, one path for which is provided by one or more conductors located at the center of the bundle, and the other by the remaining conductors connected in electrical parallel and arrayed in a generally circular pattern around the center. Insulated conductor spacers hold the conductors in their symmetrical configuration and insulate the center conductor, allowing it to serve as a radio frequency path similar to that in a conventional coaxial cable. The system provides low attention, low vulnerability to external noise and low radiation of the carrier signal while providing redundant channels—three for ac transmission lines and two for bipolar dc transmission lines.

Abstract: Re-strike in the circuit breaker of a capacitive load applied across an AC voltage power supply is reduced or avoided by connecting across the capacitor bank a tuned discharge circuit. The tuned discharge circuit includes a transformer with a primary connected in parallel with the capacitor bank and a secondary which can be shorted through a switch. The leakage reactance of the transformer is equated to the capacitive reactance of the capacitor bank so that the tuned circuit discharges the capacitor voltage in phase with the supply voltage. The discharge takes place through a number of cycles thus gradually increasing the voltage across the breaker gap. The switch in the secondary preferably comprises an anti-parallel pair of thyristors fired by a circuit responsive to current zero in the capacitive circuit detected over a delay period to avoid firing at normal zero crossing current.

Abstract: The invention comprises a reactive device inserted within the secondary circuit of a power transformer connected to a AC transmission line which can be controlled in both inductive and compacitive modes with step changes being achieved by switching capacitors and/or inductors with suitable fast acting switches. If required, continuous changes in reactants, as for example, between switching steps, can be added by incorporating a saturated reactor or a thyristor controlled reactor.