Power controller and power control method

Patent metadata

Field	Value
Publication number	US-10468977-B2
Application number	US-201415526988-A
Country	US
Kind code	B2
Filing date	Nov 13, 2014
Priority date	Nov 13, 2014
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

A power controller for an AC power converter connected in series with a load and receiving power from or delivering power to a power source, the power controller comprising: a radial control block controlling a radial component of an electrical parameter of the AC power converter; and a chordal control block controlling a chordal component of the electrical parameter of the AC power converter. Also provided is a power system comprising one or more loads each connected in series to a power converter each controlled by a power controller as described above. There is also provided a method of controlling an AC power converter connected in series with a load and receiving power from a power source, the method comprising: controlling a radial component of an electrical parameter of the AC power converter; and controlling a chordal component of the electrical parameter of the AC power converter.

First claim

The invention claimed is:

1. A power controller for an AC/DC power converter comprising an AC power port and connected in series with a load through the AC power port comprising two connections, wherein the series connection between the AC/DC power converter and the load comprises one of the two connections of the AC power port of the AC/DC power converter being connected to an AC power source, and the other connection of the two connections being connected to the load, wherein both of the AC/DC power converter and the load are capable of being configured to receive power from and deliver power to the AC power source, the power controller comprising:
a radial control block that controls a radial component of an electrical parameter of the AC/DC power converter connected in series with the load through the AC power port; and
a chordal control block that controls a chordal component of the electrical parameter of the AC/DC power converter.

2. A power controller according to claim 1 wherein the electrical parameter is one of: voltage, current, power, or frequency.

3. A power controller according to claim 1 comprising a first input, a second input, and a third input, wherein the first input is a magnitude of the electrical parameter of the AC power source, the second input is a desired magnitude of the radial component of the electrical parameter of the AC power converter, and the third input is a desired difference between a phase angle of the electrical parameter of the AC power source and a phase angle of the electrical parameter of the load.

4. A power controller according to claim 3 wherein the electrical parameter is voltage and the radial control block controls the radial component in accordance with the following relationships:

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Assignees

• Univ Hong Kong

Inventors

• Mok Kwan Tat
• Tan Siew Chong
• Hui Shu Yuen Ron

Classifications

• G05F1/565

  sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor (G05F1/563 takes precedence) · CPC title

• G05F1/455

  with phase control · CPC title

• Y02E40/30

  Reactive power compensation · CPC title

• H02M5/293

  using semiconductor devices only · CPC title

• H02M7/5387

  in a bridge configuration · CPC title