US4855922A
Expired / Lapsed
US
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Apparatus and method for monitoring an energy management system
Assignee: Comverge Inc
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Filing: 1987-03-20
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Granted: 1989-08-08
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Expires: 2007-03-20
Abstract
Abstract A method and apparatus are provided for monitoring an energy management system which controllably drops load in response to preselected conditions. The apparatus periodically interrupts the energy management system to restore full load. The apparatus monitors energy usage immediately prior to interrupting the energy management system and also monitors the energy usage during interruption when the load is restored. The information gathered at these two times represents the actual energy used when the energy management system is conserving energy, and when the energy management system is disabled and full energy usage is realized. The difference between the two energy usages represents the energy savings realized by using the energy management system.
Inventors
- 👤 Paul M. Huddleston
- 👤 G. Burns Porter, Jr.
- 👤 David T. Rooney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:20
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/12; H02J3/14; H02J2105/00; H02J2105/50; H02J2105/52; Y; Y02; Y02B; Y02B70/00; Y02B70/30; Y02B70/3225; Y04; Y04S; Y04S20/00; Y04S20/20; Y04S20/222
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
131 words
An apparatus for determining a parameter of operation of an energy management system of the type which controllably drops load from an electrical power network in response to preselected conditions, comprising: means for periodically interrupting the operation of said energy management system and restoring said load to said network; means for generating a first energy usage signal representative of energy usage on said network at a time when said energy management is not interrupted by said interrupting means; means for generating a second energy usage signal representative of energy usage on said network at a time when said interrupting means interrupts said energy management system; and means responsive to said first energy usage signal and said second energy usage signal for computing said parameter of operation of said energy management system.
Claim 2
Independent Claim
131 words
An apparatus for determining a parameter of operation of an energy management system of the type which controllably drops load from an electrical power network in response to preselected conditions, comprising: means for periodically interrupting the operation of said energy management system and restoring said load to said network; means for generating a first energy usage signal representative of energy usage on said network at a time when said energy management is not interrupted by said interrupting means; means for generating a second energy usage signal representative of energy usage on said network at a time when said interrupting means interrupts said energy management system; and means responsive to said first energy usage signal and said second energy usage signal for computing said parameter of operation of said energy management system.
Claim 3
Dependent Claim
28 words
An apparatus according to claim 1 including a signal conditioning circuit receiving a train of controlled pulses from a utility demand meter indicating electrical energy is being demanded.
Claim 4
Dependent Claim
60 words
An apparatus according to claim 1, wherein said computing means comprises a microprocessor, and further comprising means for generating a proper operation signal whenever the microprocessor is operating properly, and a proper operation watchdog means responsive to said proper operation signal for producing a reset signal which resets the microprocessor in response to failure to receive said proper operation signal.
Claim 5
Dependent Claim
21 words
An apparatus according to claim 1 including means for automatically printing energy usage and energy savings information on a periodic basis.
Claim 6
Dependent Claim
22 words
An apparatus according to claim 1 including means for automatically printing an energy usage and energy savings summary on a monthly basis.
Claim 7
Dependent Claim
19 words
An apparatus according to claim 1 including test means for providing immediate information on system operation and energy savings.
Claim 8
Dependent Claim
21 words
An apparatus according to claim 1 including means for remotely accessing energy usage and savings information via a telephone modem interface.
Claim 9
Dependent Claim
13 words
An apparatus according to claim 7 including means for preventing unauthorized telephone access.
Claim 10
Dependent Claim
20 words
An apparatus according to claim 1 including means for determining the peak kilowatt demand for loads connected to said network.
Claim 11
Dependent Claim
20 words
An apparatus according to claim 1, including means for determining the peak kilowatt demand for loads connected to said network.
Claim 12
Dependent Claim
43 words
An apparatus according to claim 1, wherein said parameter of operation is an energy demand parameter, and further including means responsive to said energy demand parameter for preventing a new peak resultant from loads restored to said network by disabling said interrupting means.
Claim 13
Dependent Claim
31 words
An apparatus according to claim 1 including means for establishing a target energy demand level above which said interrupting means does not interrupt the energy management system and restore full load.
Claim 14
Dependent Claim
18 words
An apparatus according to claim 12 wherein the target energy demand level is selectively variable within preselected limits.
Claim 15
Dependent Claim
21 words
The apparatus of claim 1, wherein said parameter of operation is energy savings realized by use of said energy management system.
Claim 16
Independent Claim
148 words
An apparatus for determining a parameter of operation of an energy management system connected to an electrical power network, comprising: load control means operatively associated with said energy management system for selectively adding or dropping electrical load from said network in response to a predetermined condition; interrupting means for controllably interrupting said load control means and for restoring full electrical load, said interrupting means generating a first signal representative of energy usage when said load control means is interrupted and generating a second signal representative of energy usage when said load control means is not interrupted; computing means responsive to said first and second signals for computing said parameter of operation; and peak demand control means operatively associated with said energy management system for preventing establishment of a new peak demand level by disabling operation of said interrupting means in response to demand exceeding a preselected peak level.
Claim 17
Independent Claim
148 words
An apparatus for determining a parameter of operation of an energy management system connected to an electrical power network, comprising: load control means operatively associated with said energy management system for selectively adding or dropping electrical load from said network in response to a predetermined condition; interrupting means for controllably interrupting said load control means and for restoring full electrical load, said interrupting means generating a first signal representative of energy usage when said load control means is interrupted and generating a second signal representative of energy usage when said load control means is not interrupted; computing means responsive to said first and second signals for computing said parameter of operation; and peak demand control means operatively associated with said energy management system for preventing establishment of a new peak demand level by disabling operation of said interrupting means in response to demand exceeding a preselected peak level.
Claim 18
Dependent Claim
21 words
The apparatus of claim 15, wherein said parameter of operation is energy savings realized by use of said energy management system.
Claim 19
Independent Claim
114 words
A method for determining energy saved by an energy management system which controllably drops load from an electrical power network under predetermined conditions, comprising the steps of: periodically interrupting the energy management system and allowing reconnection of loads to said network; generating a signal representative of energy usage at a first time when the energy management system is not interrupted; generating a signal representative of energy usage at a second time when the energy management system is interrupted; receiving the signals representative of energy usage and determining a difference in energy usage at said first time and said second time; and applying an energy rate to the difference in order to determine energy saved.
Claim 20
Independent Claim
114 words
A method for determining energy saved by an energy management system which controllably drops load from an electrical power network under predetermined conditions, comprising the steps of: periodically interrupting the energy management system and allowing reconnection of loads to said network; generating a signal representative of energy usage at a first time when the energy management system is not interrupted; generating a signal representative of energy usage at a second time when the energy management system is interrupted; receiving the signals representative of energy usage and determining a difference in energy usage at said first time and said second time; and applying an energy rate to the difference in order to determine energy saved.
Claim 21
Dependent Claim
20 words
A method according to claim 17 wherein the step of periodically interrupting the energy management system includes restoring full load.
Claim 22
Dependent Claim
12 words
A method according to claim 18 including determining the peak kilowatt usage.
Claim 23
Dependent Claim
11 words
A method according to claim 19 including determining the kilowatt-hours used.
Claim 24
Dependent Claim
52 words
A method according to claim 17, further comprising the steps of: setting a "not to exceed" peak demand level; monitoring the demand of loads connected to said network; preventing a new peak demand by not carrying out the interrupting step in response to the monitored demand exceeding the "not to exceed" level.
Claim 25
Independent Claim
114 words
An apparatus for monitoring an energy management system of the type which controllably drops load in response to preselected conditions, comprising: means for periodically interrupting the energy management system and restoring load; means for generating a signal representative of energy usage at a time when the energy management system is not interrupted by the interrupting means; means for generating a signal representative of energy usage at a time when the interrupting means interrupts the energy management system; means responsive to the signals representing energy usage for computing energy savings; and means for establishing a target energy demand level above which said interrupting means does not interrupt the energy management system and restore full load.
Claim 26
Independent Claim
114 words
An apparatus for monitoring an energy management system of the type which controllably drops load in response to preselected conditions, comprising: means for periodically interrupting the energy management system and restoring load; means for generating a signal representative of energy usage at a time when the energy management system is not interrupted by the interrupting means; means for generating a signal representative of energy usage at a time when the interrupting means interrupts the energy management system; means responsive to the signals representing energy usage for computing energy savings; and means for establishing a target energy demand level above which said interrupting means does not interrupt the energy management system and restore full load.
Claim 27
Dependent Claim
18 words
An apparatus according to claim 22 wherein the target energy demand level is selectively variable within preselected limits.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |