Utility-interactive inverter system architecture and method of operation thereof

• US 9,184,592 B2
• Filed: 12/17/2009
• Issued: 11/10/2015
• Est. Priority Date: 08/05/2008
• Status: Active Grant

• Current Assignee: Lennox Industries Incorporated (Lennox International Incorporated)
• Original Assignee: Lennox Industries Incorporated (Lennox International Incorporated)
• Inventors: Uselton, Robert B., Brizendine, Timothy J.
• Primary Examiner(s): Fureman, Jared
• Assistant Examiner(s): PEREZ BORROTO, ALFONSO
• Application Number:
  US12/641,154
• Publication Number:
  US 20100127572A1
• Time in Patent Office: 2,154 Days
• US Class Current: 1/1
• CPC Class Codes: F04D 25/022 comprising a yielding coupling, e.g. hydraulic a magnetic coupling F04D25/026
• CPC Class Codes: F04D 25/06 the pump being electrically driven F04D25/08 takes precedence
• CPC Class Codes: F04D 25/08 the working fluid being air, e.g. for ventilation
• CPC Class Codes: H02J 2300/24 of photovoltaic origin
• CPC Class Codes: H02J 2300/28 The renewable source being wind energy wind motors F03D
• CPC Class Codes: H02J 3/38 Arrangements for parallely feeding a single network by two or more generators, converters or transformers
• CPC Class Codes: H02J 3/381 Dispersed generators
• CPC Class Codes: H02J 3/40 Synchronising a generator for connection to a network or to another generator
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers

Abstract

Electrically powered equipment and a method of powering the equipment. In one embodiment, the equipment includes: (1) an electric power consuming apparatus, (2) a mains input coupled to the apparatus and configured to be coupled to a branch circuit extending from a distribution panel and allow electric power from the branch circuit to flow to the apparatus and (3) a grid-tied power source input at least intermittently couplable to the mains input and configured to receive electric power from at least one premises power source and allow the electric power to flow to the apparatus or the distribution panel. In a more specific embodiment, the equipment is an outdoor unit.

Claims

1. An electrical power system for transmitting electrical power to and from a distribution panel using a branch circuit, the system comprising:

at least one premises power source;

a commercial electric power source on a grid,

an electrically-powered equipment having a least a portion located outdoors, wherein the electrically-powered equipment comprises climate control equipment, the electrically-powered equipment comprising;

an apparatus that consumes electrical power,

a mains input electrically-coupled to the commercial electric power source via the distribution panel, the mains input configured to receive electrical power from or supply electrical power to the grid via the branch circuit and distribution panel,

a grid-tied power source input electrically-coupled to the premises power source and the mains input, the grid-tied power source input configured to receive electrical power from the premises power source, and

wherein the electrically-powered equipment is configured to output electrical power from the mains input when electrical power received by the grid-tied power source input exceeds a power requirement of the apparatus.

2. The system of claim 1, wherein the electrically-powered equipment further comprises a utility-interactive inverter having an input and an output, the input configured to receive direct-current power from the grid-tied power source input, the output configured to supply alternating-current power.

3. The system of claim 1, further comprising a controllable disconnect, the controllable disconnect configured to close based on a status of at least one of the at least one premises power source.

4. The system of claim 1, wherein the at least one premises power source is configured to convert renewable energy into electrical power.

5. The system of claim 1, further comprising:

an external utility-interactive inverter located proximate the at least one premises power source and associated therewith;

wherein the at least one premises power source is configured to convert renewable energy into electrical power;

wherein the external utility-interactive inverter is configured to receive direct-current power from the at least one premises power source; and

wherein the external utility-interactive inverter is configured to supply alternating-current power to the grid-tied power source input.

6. The system of claim 1, further comprising:

wherein the at least one premises power source is configured to convert renewable energy into electrical power; and

wherein the at least one premises power source is electrically-coupled to the grid-tied power source input via a direct-current bus.

7. The system of claim 1, further comprising:

wherein the at least one premises power source is configured to convert renewable energy into electrical power;

wherein the at least one premises power source is electrically-coupled to the grid-tied power source input via an alternating-current bus; and

wherein the at least one premises power source is configured to produce direct-current power and convert direct-current power so-produced into alternating-current power for transmission along the alternating-current bus.

8. The system of claim 4, wherein the at least one premises power source converts solar energy into electrical power.

9. The system of claim 4, wherein the at least one premises power source converts wind energy into electrical power.

10. A method for transmitting electrical power to and from a distribution panel using a branch circuit, the method comprising:

using a mains input of an electrically-powered equipment to receive electrical power;

receiving electrical power from at least one premises power source at a grid-tied power source input of the electrically-powered equipment;

providing electrical power to an apparatus of the electrically-powered equipment;

supplying electrical power to the branch circuit when electrical power received by the grid-tied power source input exceeds an amount required by the apparatus; and

wherein the at least one premises power source converts renewable energy into electrical power.

11. The method of claim 10, wherein the step of receiving electrical power from the at least one premises power source comprises closing a controllable disconnect to allow electrical power to flow from the premises power source to the grid-tied power source input of the electrically-powered equipment.

12. The method of claim 10, wherein the at least one premises power source produces direct current power and the grid-tied power source input converts direct-current electrical power received from the at least one premises power source into alternating-current power.

13. The method of claim 10, wherein the apparatus comprises a motor of a climate-control system.

14. The method of claim 10, wherein the at least one premises power source converts solar energy into electrical power.

15. The method of claim 10, wherein the at least one premises power source converts wind energy into electrical power.

16. An outdoor system for transmitting electrical power to and from a distribution panel using a branch circuit, the outdoor system comprising:

an electrically-powered equipment having a least a portion located outdoors, the electrically-powered equipment comprising;

a motor configured to perform work on fluid in a climate-control system,

a mains input electrically-coupled to the motor, the mains input configured to receive electrical power from and supply electrical power to the branch circuit,

a grid-tied power source input electrically-coupled to the mains input and the motor, the grid-tied power source configured to receive electrical power from at least one premises power source, and

wherein the electrically-powered equipment is configured to output electrical power from the mains input when electrical power received by the grid-tied power source input exceeds a power requirement of the motor.

17. The outdoor system of claim 16, wherein the electrically-powered equipment further comprises a utility-interactive inverter having an input and an output, the input configured to receive direct-current power from the grid-tied power source input, the output configured to supply alternating-current power.

18. The outdoor system of claim 16, further comprising a controllable disconnect, the controllable disconnect configured to close based on a status of at least one of the at least one premises power source.