Uninterruptible power supplies, solar power kits for uninterruptible power supplies and related methods

• US 8,227,937 B2
• Filed: 06/26/2009
• Issued: 07/24/2012
• Est. Priority Date: 07/02/2008
• Status: Expired due to Fees

• Current Assignee: NNW Ventures, LLC
• Original Assignee: NNW Ventures, LLC
• Inventors: Barlock, Paul Regis, Donnelly, Matthew Kenneth
• Primary Examiner(s): RUTLAND WALLIS, MICHAEL
• Application Number:
  US12/493,079
• Publication Number:
  US 20100019577A1
• Time in Patent Office: 1,124 Days
• Field of Search: 307/66
• US Class Current: 307/66
• CPC Class Codes: H02J 7/35 with light sensitive cells
• CPC Class Codes: H02J 9/062 for AC powered loads
• CPC Class Codes: Y02B 10/70 Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
• CPC Class Codes: Y02E 10/56 Power conversion systems, e.g. maximum power point trackers

Abstract

Uninterruptible power supplies, solar power kits for uninterruptible power supplies and related methods are described. According to one aspect, an uninterruptible power supply includes a power bus, mains circuitry configured to rectify electrical energy received from a mains supply system into rectified electrical energy and to provide the rectified electrical energy to a power bus of the uninterruptible power supply, photovoltaic circuitry configured to convert solar energy into converted electrical energy and to provide the converted electrical energy to the power bus, a battery system configured to receive electrical energy from the power bus to charge a battery of the battery system and to discharge electrical energy to the power bus, an inverter configured to provide electrical energy from the power bus to the load, and a controller configured to monitor the photovoltaic circuitry and to implement at least one operation of the uninterruptible power supply using the monitoring.

Claims

1. An uninterruptible power supply comprising:

a power bus;

mains circuitry configured to rectify electrical energy received from a mains supply system into rectified electrical energy and to provide the rectified electrical energy to the power bus;

photovoltaic circuitry configured to convert solar energy into converted electrical energy and to provide the converted electrical energy to the power bus;

a battery system configured to receive electrical energy from the power bus to charge a battery of the battery system and to discharge electrical energy to the power bus;

an inverter configured to provide electrical energy from the power bus to a load;

a controller configured to monitor the photovoltaic circuitry and to implement at least one operation of the uninterruptible power supply using the monitoring;

wherein the controller is configured to implement the at least one operation comprising calculating a remaining period of time the uninterruptible power supply can provide the electrical energy from the power bus to the load during an emergency mode of operation when electrical energy is unavailable from the mains supply system; and

a sensor configured to provide information regarding an amount of light present at the photovoltaic circuitry, and wherein the controller is configured to use the information regarding an amount of light present at the photovoltaic circuitry to determine the remaining period of time.

2. The supply of claim 1 wherein the controller is configured to monitor an amount of the converted electrical energy provided by the photovoltaic circuitry and to implement another operation comprising controlling an amount of the rectified electrical energy provided by the rectifier to the power bus.

3. The supply of claim 1 wherein the controller is configured to monitor an amount of the converted electrical energy provided by the photovoltaic circuitry and to implement another operation comprising controlling shedding of a portion of the load.

4. The supply of claim 3 wherein the controller is configured to shed the portion of the load so that a remaining portion of the load receiving the electrical energy from the inverter corresponds to the amount of the converted electrical energy provided by the photovoltaic circuitry.

5. The supply of claim 3 wherein the controller is configured to implement another operation comprising controlling shedding an entirety of the load.

6. The supply of claim 1 wherein the controller is configured to implement another operation comprising controlling an amount of electrical energy which is exported from the power bus to the mains supply system as a result of the monitoring of the photovoltaic circuitry.

7. The supply of claim 1 wherein the controller is a distributed controller comprising first processing circuitry in a kit comprising the photovoltaic circuitry and second processing circuitry external of the kit and configured to communicate with the first processing circuitry.

8. The supply of claim 1 wherein the rectifier is configured to regulate a voltage of the power bus.

9. The supply of claim 8 wherein the controller is configured to implement another operation comprising controlling the regulation of the voltage of the power bus by the rectifier.

10. The supply of claim 1 wherein the inverter is configured to provide the electrical energy from the power bus to the load during periods of time when the rectifier is providing the rectified electrical energy and during periods of time when the rectifier is not providing the rectified electrical energy.

11. The supply of claim 1 wherein the controller is configured to automatically implement the at least one operation in an absence of user input instructing the controller to implement the at least one operation.

12. The supply of claim 1 wherein the controller is configured to use information regarding an estimate of an amount of light to be received by the photovoltaic circuitry in the future to determine the remaining period of time.

13. The supply of claim 12 wherein the controller is configured to use geographical location information regarding a location of the photovoltaic circuitry to estimate the amount of light.

14. The supply of claim 13 wherein the controller is configured to use weather forecast information to estimate the amount of light.

15. The supply of claim 1 wherein the controller is configured to monitor an amount of converted electrical energy provided by the photovoltaic circuitry to the power bus to monitor the photovoltaic circuitry.

22. The supply of claim 1 wherein the controller is configured to vary an amount of the rectified electrical energy provided by the mains circuitry to the power bus as a result of the monitoring of the photovoltaic circuitry.

16. An uninterruptible power supply comprising:

a power bus;

a rectifier configured to rectify electrical energy from a mains supply system into rectified electrical energy and to provide the rectified electrical energy to the power bus;

photovoltaic circuitry configured to convert solar energy into converted electrical energy and to provide the converted electrical energy to the power bus;

a battery system configured to receive electrical energy from the power bus to charge a battery of the battery system and to discharge electrical energy to the power bus;

an inverter configured to provide electrical energy from the power bus to a load;

a controller configured to monitor the uninterruptible power supply and to vary an amount of the converted electrical energy provided by the photovoltaic circuitry to the power bus as a result of the monitoring of the uninterruptible power supply; and

wherein the controller is configured to monitor the power bus and to vary the amount of the converted electrical energy provided by the photovoltaic circuitry to the power bus as a result of the monitoring of the power bus.

17. The supply of claim 16 wherein the controller is configured to monitor a voltage of the power bus to monitor the power bus and to vary the amount of the converted electrical energy provided by the photovoltaic circuitry to the power bus as a result of the monitoring of the voltage of the power bus.

18. The supply of claim 17 wherein the controller is configured to reduce the amount of the converted electrical energy provided by the photovoltaic circuitry to the power bus as a result of the voltage of the power bus exceeding a threshold.

19. The supply of claim 17 wherein the controller is configured to cease the provision of the converted electrical energy from the photovoltaic circuitry to the power bus as a result of the voltage of the power bus exceeding a threshold.

23. The supply of claim 18 wherein the controller is configured to monitor circuitry of the uninterruptible power supply other than the photovoltaic circuitry and the power bus and to vary the amount of the converted electrical energy provided by the photovoltaic circuitry to the power bus as a result of the monitoring of the circuitry of the uninterruptible power supply other than the photovoltaic circuitry and the power bus.

20. A solar power kit for an uninterruptible power supply comprising:

at least one photovoltaic panel configured to convert solar energy into electrical energy;

a dc-to-dc converter coupled with the photovoltaic panel and configured to convert a voltage of the electrical energy from the photovoltaic panel to a different voltage to provide converted electrical energy;

interface circuitry configured to couple with a power bus of an uninterruptible power supply and to provide the converted electrical energy to the power bus of the uninterruptible power supply; and

a controller configured to access information regarding an electrical characteristic of the power bus and to control an amount of the converted electrical energy provided by the at least one photovoltaic panel to the power bus using the information regarding the electrical characteristic of the power bus.

21. The kit of claim 20 further comprising a sensor coupled with the interface circuitry and configured to provide information regarding an amount of the converted electrical energy being provided by the dc-to-dc converter and to communicate the information to the uninterruptible power supply using the interface circuitry.