Active power conditioner system
AssigneeWestinghouse Electric Corp.
InventorsEric J. Stacey, Michael B. Brennen
Life of this patent
Estimating the term…
Abstract
At least two active conditioners are connected in series with a common DC source, and are mounted as a unit between two pairs of AC terminals to act either as a tie-in link between two AC power sources, as a buck/boost regulator between one AC power source and its load, or as VAR compensator as well as active power conditioner between phases of a multiphase AC option.
Claims16
A system for power conditioning a line of supply of AC power from an AC source to an AC load, comprising:
- a first array of static power switches mounted across one or said AC source and AC load;
- a second array of static power switches coupled in series with said AC supply line;
- a DC source connected between said first and second arrays;
- first controlling means operative upon said first array in one of two modes to effect conversion between said one of said AC source and AC load on one side and said DC source on the other side;
- second controlling means operative upon said second array in one of two modes to effect conversion between said DC source on one side and said AC supply line on the other side;
- said first array operating as a rectifier when said second array operates as an inverter, and said first array operating as an inverter when said second array operates as a rectifier;
- whereby said first and second controlling means provide one of a buck and boost voltage on said AC supply line while maintaining said DC source constant.
A system for power conditioning a supply of AC power from a multi-phase AC source to an AC load via at least two AC lines, comprising:
- at least two arrays of static power switches coupled to a common DC source;
- one of said two arrays of static power switches being connected in parallel to one of said AC source and AC load;
- the other of said two arrays of static power switches being connected in series with the other of said AC source and AC load on one of said AC lines;
- with the provision of respective first and second means for controlling said arrays to exchange power between said DC source and said AC lines and between said AC lines and said common DC source;
- with said first and second controlling means being operated to provide buck/boost voltage regulation on said AC lines.
A system for power conditioning a 3-phase AC supply of AC power from three balanced AC sources to unbalanced AC loads via corresponding AC lines, comprising:
- three arrays of static power switches coupled to a common DC source and separately coupled across respective pairs of said AC lines;
- with the provision of respective first and second means for controlling said arrays to exchange power between said DC source and said AC lines and betweeen said AC lines and said common DC source;
- and
- with said first and second controlling means being operated to balance said AC loads via said pairs of AC lines.
A system for power conditioning a supply of AC power from a multi-phase AC source to an AC load via at least two AC lines, comprising:
- at least two arrays of static power switches coupled to a common DC source;
- one of said two arrays of static power switches being connected in parallel to one of said one AC source and AC load;
- the other of said two arrays of static power switches being connected in series with the other of said AC source and AC load on one of said AC lines;
- with the provision of respective first and second means for controlling said arrays to exchange power between said DC source and said AC lines and between said AC lines and said common DC source;
- and
- with said first and second controlling means providing ripple compensation on at least one of said AC lines.
A system for power conditioning a supply of AC power from a three-phase Ac source to an AC load, via star-connected phase lines and a neutral line, comprising:
- three arrays of static power switches each in a bridge;
- each bridge having one side connected in shunt across one corresponding phase line and neutral;
- said bridges having a DC source in common on the other side;
- means being provided with each bridge for controlling the switches to provide balanced load compensation between the phase lines.
A system for power conditioning a supply of AC power from a three-phase AC source to an AC load, via delta-connected AC phase lines, comprising:
- at least two arrays of static power switches each in a bridge;
- each bridge having one side connected in shunt across a corresponding pair of said phase lines;
- said bridges having a DC source in common on the other side;
- means being provided with each bridge for controlling the switches to provide balanced load compensation between the phase lines.
A system for power conditioning a supply of AC power from a three-phase AC source to an AC load, via delta-connected AC phase lines, comprising:
- a first pair of arrays of static power switches each in a bridge, each bridge of said first pair having one side connected in shunt across a corresponding pair of said phase lines;
- a second pair of arrays of static power switches each in a bridge, each bridge of said second pair having one side coupled in series with a separate one of said AC phase lines;
- a DC source being provided in common to said other sides of said two pairs of bridges;
- first and second means being respectively provided for controlling said bridges of said second pair to provide buck/boost voltage regulation on said AC phase lines;
- second and fourth means being provided for controlling said bridges of said first pair to maintain said DC source constant.
Dependencies are inferred from the claim text.