Interruptible power supply module

• US 6,879,059 B2
• Filed: 07/05/2001
• Issued: 04/12/2005
• Est. Priority Date: 07/05/2001
• Status: Expired due to Fees

• Current Assignee: Sleva Associates, Inc.
• Original Assignee: Sleva Associates, Inc.
• Inventors: Sleva, Anthony Francis
• Primary Examiner(s): TOATLEY, GREGORY J
• Application Number:
  US09/899,797
• Publication Number:
  US 20030011246A1
• Time in Patent Office: 1,377 Days
• Field of Search: 307/38, 307/39, 307/40, 307/29, 307/41, 361/65, 361/66
• US Class Current: 307/38
• CPC Class Codes: H02J 13/00002 characterised by monitoring
• CPC Class Codes: H02J 13/00034 the elements or equipment being or involving an electric power substation
• CPC Class Codes: H02J 2310/60 Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
• CPC Class Codes: H02J 3/14 by switching loads on to, or off from, network, e.g. progressively balanced loading
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 10/30 State monitoring, e.g. fault, temperature monitoring, insulator monitoring, corona discharge
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving

Abstract

An interruptible power supply module, located at a customer'"'"'s premise, functions to reduce the demand on a power utility company. As a power utility senses a critical power supply demand situation, it sends an “interrupt power” control signal through an alternative communications network (a telecommunications network, for example), to each subscribing customer. Upon receipt of the “interrupt” control signal, a switch is activated in the customer'"'"'s interruptible power supply module to remove a pre-defined “interruptible” load for a predetermined period of time (perhaps not to exceed 15 minutes in any hour). The module may also be used to “gracefully” add interruptible loads back onto the system after a complete power outage.

Claims

1. A customer-based interruptible power supply module for removing interruptible loads from service while maintaining firm loads in service, said module comprising:

a power line input, said power line input divided between a firm power load line and an interruptible power load line, said firm power load line exiting said module as a firm power output;

a normally-closed interruptible power switch disposed in series with said interruptible load power line, the output of said interruptible power load line exiting said module as an interruptible power output; and

a load interrupting actuation device, coupled to said interruptible power switch and responsive to an “

interrupt”

control signal, transmitted by an alternative communication network to said customer-based interruptible power supply module, where upon reception of said “

interrupt”

control signal, said interruptible power switch opens and disconnects the interruptible power load line from the power input line.

2. A customer-based interruptible power supply module as defined in claim 1 wherein the normally-closed interruptible power switch comprises

a power contact hold coil and a normally-closed load interrupting actuating device auxiliary contact disposed in series between the red and neutral leads of the power line input;

a first power contact disposed along the red lead; and

a second power contact disposed along the black lead, wherein as long as the power contact hold coil is energized, said first and second power contacts remain closed and the interruptible load power input flows through said switch to the interruptible power output, and when an “

interrupt”

control signal is received the normally-closed load interrupting actuating device opens to de-energize said power contact hold coil and open said first and second power contacts, disconnecting said interruptible power load line from said interruptible power output.

3. A customer-based interruptible power supply module as defined in claim 2 wherein the normally-closed interruptible power supply switch further comprises

an interruption blocking timer to control the length of time the interruptible power supply switch is in the open position.

4. A customer-based interruptible power supply module as defined in claim 3 wherein the interruption blocking timer re-activates said interruptible power supply switch after a predetermined time interval.

5. A customer-based interruptible power supply module as defined in claim 4 wherein the predetermined time interval is not to exceed 30 minutes.

6. A customer-based interruptible power supply module as defined in claim 5 wherein the predetermined time interval is not to exceed 15 minutes.

7. A customer-based interruptible power supply module as defined in claim 3 wherein the interruption blocking timer comprises

an interruption blocking timer coil disposed in parallel with the power contact hold coil between the red and neutral power leads;

and

a normally-open interruption blocking contact disposed in parallel with the normally-closed load interrupting actuating device auxiliary contact.

8. A customer-based interruptible power supply module as defined in claim 1 wherein the normally-closed interruptible power supply switch further comprises

a cold load timer for providing an additional delay for re-activating the interruptible power supply load line after a power outage.

9. A customer-based interruptible power supply module as defined in claim 8 wherein the cold load timer comprises

a cold load coil disposed between the red and neutral leads of the input power line and controlled by a time-delay-pick-up element to be re-energized a predetermined period of time after a power outage;

and

a cold load contact disposed in series with the normally-closed load interrupting actuating device auxiliary contact, said cold load contact for remaining open as long as said cold load coil is de-energized, disconnecting the signal path between the interruptible power load line input from the interruptible power output.

10. A customer-based interruptible power supply module as defined in claim 1 wherein the designation between firm load and interruptible load is determined by the customer.

11. A customer-based interruptible power supply module as defined in claim 1 wherein the load interrupting actuating device is responsive to an “

interrupt”

control signal transmitted by a telecommunications carrier to the customer.

12. An arrangement for allowing a power utility to drop power supply input to customer-defined interruptible loads, the arrangement comprising

a power utility sensing arrangement for determining the need to clip power supplied to a customer base comprising a plurality of N customers, and transmitting a “

clip load”

control signal to a communications network also coupled to the customer base;

a plurality of N interruptible power supply modules, each module disposed at a separate customer location and comprising

a power line input, said power line input divided between a firm power load line and an interruptible power load line, said first power load line exiting said module as a firm power output;

a normally-closed interruptible power switch disposed in series with said interruptible power load line, the output of said interruptible power load line exiting said module as an interruptible power output; and

a load interrupting actuation device, coupled to said interruptible power switch and responsive to an “

interrupt”

control signal, transmitted by an alternative communication network to said customer-based interruptible power supply module, where upon reception of said “

interrupt”

control signal, said interruptible power switch opens and disconnects the interruptible power load line from the power input line.

13. An arrangement for allowing a power utility to drop power supply input to customer-defined interruptible loads as defined in claim 12 wherein the normally-closed interruptible power switch comprises

a power contact hold coil and a normally-closed load interrupting actuating device auxiliary contact disposed in series between the red and neutral leads of the power line input;

a first power contact disposed along the red lead; and

a second power contact disposed along the black lead, wherein as long as the power contact hold coil is energized, said first and second power contacts remain closed and the interruptible load power input flows through said switch to the interruptible power output, and when an “

interrupt”

control signal is received;

the normally-closed load interrupting actuating device opens to de-energize said power contact hold coil and open said first and second power contacts, disconnecting said interruptible power load line from said interruptible power output.

14. An arrangement for allowing a power utility to drop power supply input to customer-defined interruptible loads as defined in claim 13 wherein the normally-closed interruptible power supply further comprises

an interruption blocking timer to control the length of time the interruptible power supply switch is in the open position.

15. An arrangement for allowing a power utility to drop power supply input to customer-defined interruptible loads as defined in claim 14 wherein the interruption blocking timer re-activates said interruptible power supply switch after a predetermined time interval.

16. An arrangement for allowing a power utility to drop power supply input to customer-defined interruptible loads as defined in claim 15 wherein the predetermined time interval is not to exceed 30 minutes.

17. An arrangement for allowing a power utility to drop power supply input to customer-defined interruptible loads as defined in claim 16 wherein the predetermined time interval is not to exceed 15 minutes.

18. An arrangement for allowing to drop a power utility to drop power supply input to customer-defined interruptible loads as defined in claim 14 wherein the interruption blocking timer comprises

an interruption blocking timer coil disposed in parallel with the power contact hold coil between the red and neutral power leads;

and

a normally-open interruption blocking contact disposed in parallels with the normally-closed load interrupting actuating device auxiliary contact.

19. A customer-based interruptible power supply module as defined in claim 12 wherein the normally-closed interruptible power supply switch further comprises

a cold load timer for providing an additionally delay for re-activating the interruptible power supply load line after a power outage.

20. A customer-based interruptible power supply module as defined in claim 19 wherein the cold load timer comprises

a cold load coil disposed between the red and neutral leads of the input power line and controlled by a time-delay-pick-up element to be re-energized a predetermined period of time after a power outage;

and

a cold load contact disposed in series with the normally-closed load interrupting actuating device auxiliary contact, said cold load contact for remaining open as long as said cold load coil is de-energized, disconnecting the signal path between the interruptible power load line from the interruptible power output.

21. A customer-based interruptible power supply module as defined in claim 12 wherein the designation between firm load and interruptible load is determined by the customer.

22. A customer-based interruptible power supply module as defined in claim 12 wherein the load interrupting actuating device is responsive to an “

interrupt”

control signal transmitted by a telecommunications carrier to the customer.