Uninterruptible power supplies for use in a distributed network

• US 9,312,726 B2
• Filed: 01/17/2012
• Issued: 04/12/2016
• Est. Priority Date: 01/23/2011
• Status: Active Grant

• Current Assignee: Alpha Technologies Services, Inc. (EnerSys)
• Original Assignee: Alpha Technologies Incorporated (EnerSys)
• Inventors: Heidenreich, James Joseph, Roybal, Ronald Jay, Le, Thanh Quoc, Bhatt, Pankaj H.
• Primary Examiner(s): Barnie, Rexford
• Assistant Examiner(s): Dhillon, Jagdeep
• Application Number:
  US13/352,317
• Publication Number:
  US 20120212051A1
• Time in Patent Office: 1,547 Days
• Field of Search: 307/66, 307/64, 307/65, 307/85, 307/87, 307/86, 323/258, 323/259, 361/639, 361/648, 702/183, 702/63
• US Class Current: 1/1
• CPC Class Codes: G01R 31/36 Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
• CPC Class Codes: G16Z 99/00 Subject matter not provided for in other main groups of this subclass
• CPC Class Codes: H01M 10/441 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/443 in response to temperature
• CPC Class Codes: H01M 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: H01M 2010/4271 Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
• CPC Class Codes: H02B 1/20 Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards installations of bus-bars H02G5/00
• CPC Class Codes: H02B 13/02 with metal casing
• CPC Class Codes: H02H 3/00 Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems H02H7/00; systems for change-over to standby supply H02J9/00 ; integrated protection for motors H02H7/0822
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• CPC Class Codes: H02J 9/00 Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
• CPC Class Codes: H02J 9/061 for DC powered loads
• CPC Class Codes: H02J 9/062 for AC powered loads
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A UPS module configured to be arranged between at least one AC line and a communications system comprising at least one load comprises a power system, a diagnostic system, and a communications module. The power system comprising a battery module, an inverter module, and a transformer module and is operatively connected between the AC line and the at least one load. The diagnostic system generates battery diagnostic information, inverter diagnostic, utility diagnostic information, and transformer diagnostic information. The communications module transfers diagnostic information between the diagnostic system and the communications system.

Claims

1. A UPS module configured to be arranged between a utility power supply supplying a utility power signal and a cable television system comprising at least one load, comprising:

a power system comprising a battery module, an inverter module, and a transformer module, where the power system is operatively connected between the utility power supply and the at least one load such that

when the utility power signal is within predetermined line parameters, the power system operates in a line mode to

supply power from the utility power supply to the at least one load through the transformer module, and

supply power from the utility power supply to the battery module through the transformer module and the inverter module, and

when the utility power signal is not within predetermined line parameters, the power system in a standby mode to supply power from the battery module to the at least one load through the inverter module and the transformer module;

a diagnostic system comprising

a battery diagnostic module configured to generate battery diagnostic information based on at least one operating characteristic of at least one element of the battery module, where the battery diagnostic information comprises

current status information indicative of performance of the battery module if the power system is operated in the standby mode when the battery diagnostic information is generated, and

projected status information indicative of projected performance of the battery module should the power system be operated in standby mode at some point in time after the diagnostic information is generated,

an inverter diagnostic module configured to generate inverter diagnostic information based on at least one operating characteristic of at least one element of the inverter module, where the inverter diagnostic information is indicative of mean time between failure of the inverter module,

a utility diagnostic module configured to generate utility diagnostic information based on at least one operating characteristic of at least one element of the utility power signal supplied by the utility power supply, and

a transformer diagnostic module configured to generate transformer diagnostic information based on at least one operating characteristic of at least one element of the transformer module, where the transformer diagnostic information is indicative of mean time between failure of the transformer module; and

a communications module operatively connected between the diagnostic module and the communications system to transfer battery diagnostic information, inverter diagnostic information, utility diagnostic information, and transformer diagnostic information between the diagnostic system and the cable television system.

2. The UPS module as recited in claim 1, in which the battery diagnostic module generates the battery diagnostic information based on at least one of voltage, current, internal battery temperature, ambient temperature, charge times, and discharge times associated with the battery module.

3. The UPS module as recited in claim 1, in which the inverter diagnostic module generates the inverter diagnostic information based on a temperature within the inverter module associated with an electrolytic capacitor within the inverter module.

4. The UPS module as recited in claim 1, in which the inverter diagnostic module generates the inverter diagnostic information based on an average daily temperature within the inverter module.

5. The UPS module as recited in claim 4, in which the inverter diagnostic information is at least partly expressed as inverter age in days.

6. The UPS module as recited in claim 5, in which:

if the average daily temperature is greater than or equal to a baseline temperature, the inverter age in days is equal to an accumulated age in days of a last sample+2^[(sample temp−

baseline temperature)/10]; and

if the average daily temperature is less than the baseline temperature, the inverter age in days is equal to the accumulated age in days of the last sample plus 1 day.

7. The UPS module as recited in claim 1, in which the utility diagnostic module that generates the utility diagnostic information based on at least one of line surges, line sags, line outages, and line frequency deviation.

8. The UPS module as recited in claim 1, in which the transformer diagnostic module that generates the transformer diagnostic information based on a temperature of a resonant capacitor within the transformer module.

9. The UPS module as recited in claim 8, in which the inverter diagnostic module generates the transformer diagnostic information based on a temperature profile of the resonant capacitor.

10. A method of providing uninterruptible power to at least one load of a cable television system from utility power signal supplied by a utility power supply, the method comprising the steps of:

providing a power system comprising a battery module, an inverter module, and a transformer module;

arranging the power system between the utility power supply and the at least one load;

when the utility power signal is within predetermined line parameters, operating the power system in a line mode to

supply power from the utility power supply to the at least one load through the transformer module, and

supply power from the utility power supply to the battery module through the transformer module and the inverter module;

when the utility power signal is not within predetermined line parameters, operating the power system to supply power from the battery module to the at least one load through the inverter module and the transformer module;

generating battery diagnostic information based on at least one operating characteristic of at least one element of the battery module, where the battery diagnostic information comprises

current status information indicative of performance of the battery module if the power system is operated in the standby mode when the battery diagnostic information is generated, and

projected status information indicative of projected performance of the battery module should the power system be operated in standby mode at some point in time after the diagnostic information is generated;

generating inverter diagnostic information based on at least one operating characteristic of at least one element of the inverter module, where the inverter diagnostic information is indicative of mean time between failure of the inverter module;

generating utility diagnostic information based on at least one operating characteristic of at least one element of the utility power signal supplied by the utility power supply;

generating transformer diagnostic information based on at least one operating characteristic of at least one element of the transformer module, where the transformer diagnostic information is indicative of mean time between failure of the transformer module; and

transferring the battery diagnostic information, the inverter diagnostic information, the utility diagnostic information, and the transformer diagnostic information between the diagnostic module and the cable television system.

11. The method as recited in claim 10, in which the battery diagnostic information is generated based on at least one of voltage, current, internal battery temperature, ambient temperature, charge times, and discharge times associated with the battery module.

12. The method as recited in claim 10, in which the inverter diagnostic information is generated based on a temperature within the inverter module associated with an electrolytic capacitor within the inverter module.

13. The method as recited in claim 10, in which the inverter diagnostic information is generated based on an average daily temperature within the inverter module.

14. The method as recited in claim 13, further comprising the steps of:

if the average daily temperature is greater than or equal to a baseline temperature, calculating an inverter age in days as an accumulated age in days of a last sample+2^[(sample temp−

baseline temperature)/10]; and

if the average daily temperature is less than the baseline temperature, calculating the inverter age in days as the accumulated age in days of the last sample plus 1 day.

15. The method as recited in claim 10, in which the utility diagnostic information is generated based on at least one of line surges, line sags, line outages, and line frequency deviation.

16. The method as recited in claim 10, in which the transformer diagnostic information is generated based on a temperature of a resonant capacitor within the transformer module.

17. The method as recited in claim 16, in which the inverter diagnostic information is generated based on a temperature profile of the resonant capacitor.

18. A UPS module configured to be arranged between a utility power supply supplying a utility power signal and a cable television system comprising at least one load, comprising:

a power system comprising a battery module, an inverter module, and a transformer module, where the power system is operatively connected between the utility power supply and the at least one load such that

when the utility power signal is within predetermined line parameters, the power system operates in a line mode to

supply power from the utility power supply to the at least one load through the transformer module, and

supply power from the utility power supply to the battery module through the transformer module and the inverter module, and

when the utility power signal is not within predetermined line parameters, the power system in a standby mode to supply power from the battery module to the at least one load through the inverter module and the transformer module;

a diagnostic system comprising

a battery diagnostic module configured to generate battery diagnostic information based on at least one of voltage, current, internal battery temperature, ambient temperature, charge times, and discharge times associated with the battery module, where the battery diagnostic information comprises

current status information indicative of performance of the battery module if the power system is operated in the standby mode when the battery diagnostic information is generated, and

projected status information indicative of projected performance of the battery module should the power system be operated in standby mode at some point in time after the diagnostic information is generated,

an inverter diagnostic module configured to generate inverter diagnostic information based on a temperature within the inverter module associated with an electrolytic capacitor within the inverter module, where the inverter diagnostic information is indicative of mean time between failure of the inverter module,

a utility diagnostic module configured to generate utility diagnostic information based on at least one of line surges, line sags, line outages, and line frequency deviation of utility power signal supplied by the utility power supply, and

a transformer diagnostic module configured to generate transformer diagnostic information based on a temperature of a resonant capacitor within the transformer module, where the transformer diagnostic information is indicative of mean time between failure of the transformer module; and

a communications module operatively connected between the diagnostic module and the communications system to transfer battery diagnostic information, inverter diagnostic information, utility diagnostic information, and transformer diagnostic information between the diagnostic system and the cable television system.

19. The UPS module as recited in claim 18, in which:

if the average daily temperature is greater than or equal to a baseline temperature, an inverter age in days is equal to an accumulated age in days of a last sample+2^[(sample temp−

baseline temperature)/10]; and

if the average daily temperature is less than the baseline temperature, the inverter age in days is equal to the accumulated age in days of the last sample plus 1 day.

20. The UPS module as recited in claim 18, in which the inverter diagnostic module generates the transformer diagnostic information based on a temperature profile of the resonant capacitor.