METHOD AND APPARATUS FOR CONTROLLING POWER CONSUMPTION

• US 20090240381A1
• Filed: 03/26/2007
• Published: 09/24/2009
• Est. Priority Date: 03/24/2006
• Status: Abandoned Application

• Current Assignee: Rtp Controls
• Original Assignee: Rtp Controls
• Inventors: Lane, Mark E.
• Application Number:
  US12/294,256
• Publication Number:
  US 20090240381A1
• Time in Patent Office: Days
• US Class Current: 700/296
• CPC Class Codes: H02J 2310/64 The condition being economic, e.g. tariff based load management
• CPC Class Codes: H02J 3/008 involving trading of energy or energy transmission rights
• 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: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 50/10 Energy trading, including energy flowing from end-user application to grid

Abstract

Methods and systems are disclosed for controlling energy consumption at a facility, or a group of facilities, using current and future energy prices, and seasonal and environmental information to control a load shedding scheme.

Claims

1. A method of controlling energy consumption for a facility comprising:

setting at least one energy reduction threshold;

monitoring a market indicator for energy supplied to the facility;

providing a time of day schedule for the facility wherein the schedule determines available time periods when the facility may reduce energy consumption; and

shedding facility loads corresponding to at least one energy reduction threshold if the energy reduction threshold is less than said market indicator and said time of day schedule allows for shedding.

2. The method according to claim 1 further comprising:

acquiring future energy market indicator information for the facility; and

providing a market indicator for energy calendar from the acquired energy market price information for the facility.

3. The method according to claim 2 further comprising:

acquiring current and forecast weather information; and

providing a weather calendar for the facility.

4. The method according to claim 3 further comprising subscribing to entities for the market indicator and weather information.

5. The method according to claim 4 wherein the facility loads include refrigeration loads.

6. The method according to claim 5 wherein the time of day schedule comprises days and times for forthcoming calendar months that un-noticeable shed events are allowed.

7. The method according to claim 6 wherein the time of day schedule comprises days and times for forthcoming calendar months that noticeable shed events are allowed.

8. The method according to claim 7 further comprising identifying each sheddable load at the facility by equipment identification and load amount.

9. The method according to claim 8 further comprising limiting the time that each sheddable load may be shed for a maximum or minimum.

10. The method according to claim 9 further comprising identifying categories of use for each sheddable load.

11. The method according to claim 10 further comprising assigning a priority to each sheddable load.

12. The method according to claim 11 further comprising assigning at least one sheddable load to at least one level.

13. The method according to claim 12 wherein each level further comprises a predetermined sheddable load amount for the facility.

14. The method according to claim 13 wherein each level further comprises an energy reduction threshold wherein each level has a different energy reduction threshold and functions as a step-response load shed in response to increasing market indicators.

15. The method according to claim 14 further comprising retrieving at least one refrigeration defrost times schedule for at least one refrigeration load for the facility.

16. The method according to claim 15 further comprising creating a first cost metric based on at least one refrigeration defrost times schedule in conjunction with the market indicator at those defrost times.

17. The method according to claim 16 further comprising creating a second cost metric based on at least one refrigeration defrost times schedule but at times when the market indicator is less using the energy cost calendar.

18. The method according to claim 17 further comprising comparing the second cost metric against the first cost metric to indicate defrost energy savings.

19. The method according to claim 18 further comprising providing a revised defrost times schedule for at least one refrigeration load for the facility.

20. The method according to claim 19 further comprising presenting the revised defrost times schedule with the defrost energy savings to the facility for acceptance.

21. The method according to claim 20 further comprising comparing a facility temperature setpoint with the weather calendar.

22. The method according to claim 21 further comprising:

comparing an energy reduction threshold with a market indicator for energy supplied to the facility;

retrieving the weather calendar if the market price for energy is greater than the energy reduction threshold; and

adjusting at least one temperature setpoint a predetermined number of degrees, higher or lower corresponding to cooling or heating, for temperature controlling equipment located at the facility in correspondence with the weather calendar to reduce anticipated facility energy consumption.

23. The method according to claim 22 further comprising subscribing to an energy provider for a demand response program.

24. The method according to claim 23 further comprising:

acknowledging receipt of demand response notices; and

shedding sheddable loads at the facility based on an agreed load amount.

25. The method according to claim 24 further comprising:

checking a record of the facility'"'"'s energy consumption against a third party'"'"'s record;

calculating a difference between the facility'"'"'s energy consumption record and the third party'"'"'s record; and

adjusting a power metering conversion multiplier for the facility based on the difference.

26. The method according to claim 25 further comprising:

choosing a plurality of facilities as a group for group control;

setting at least one group energy reduction threshold;

monitoring a market indicator for energy supplied to the group;

providing a time of day schedule for the group wherein the schedule determines available time periods when the group may reduce consumption; and

for each facility in the group, shedding facility loads as determined by the group control corresponding to at least one energy reduction threshold if the energy reduction threshold is less than the market price for energy and the group time of day schedule and each facility time of day schedule allows for shedding.

27. The method according to claim 26 further comprising:

acquiring future energy market price information for the group; and

providing a price for energy calendar from the acquired energy market price information for the group.

28. The method according to claim 27 wherein the amount of load shed by each facility in the group is determined by a load amount determined by at least one group energy reduction threshold price divided among the facilities in the group that allow load shedding.

29. The method according to claim 28 wherein the amount of load shed by each facility in the group is determined by a load amount determined by at least one group energy reduction threshold divided unequally among the facilities in the group that allow load shedding.

30. The method according to claim 29 wherein the unequal load amounts for the group facilities that allow load shedding are rotated within all group facilities in the group.

31. A method of controlling energy consumption for a facility comprising:

setting at least one energy reduction threshold;

monitoring a market indicator;

communicating with a control interface at a facility for the purpose of energy reduction; and

reducing energy consumption at a facility using the control interface upon receipt of a market indicator if the energy reduction threshold is less than the market indicator.

32. The method according to claim 31 wherein the market indicator is a demand response signal.

33. The method according to claim 31 wherein the market indicator is a future market price.

34. The method according to claim 31 wherein the market indicator is a spot market price.

35. The method according to claim 31 wherein the market indicator is a signal from a utility.

36. The method according to claim 31 wherein the market indicator is a requested amount of kilowatt reduction.

37. The method according to claim 31 further comprising storing market information for a facility to curtail energy.

38. The method according to claim 37 further comprising:

receiving a market indicator;

comparing the market indicator to a predefined curtailment amount; and

initiating a corresponding energy reduction.

39. The method according to claim 38 further comprising sending instructions to at least one control device at a facility to reduce energy consumption based on a market indicator.

40. The method according to claim 39 further comprising storing energy reduction information to verify the energy reduction.

41. The method according to claim 40 wherein the energy reduction information includes energy consumption.

42. The method according to claim 40 wherein the energy reduction information includes an amount of kilowatts reduced.

43. The method according to claim 40 wherein the energy reduction information includes a comparison of market prices to energy reduction and reporting financial savings.

44. The method according to claim 40 further comprising displaying a report on market savings and energy savings as a direct result of the energy reduction.

45. The method according to claim 40 further comprising sending an email report on market savings and energy savings.

46. The method according to claim 31 further comprising:

communicating with a facility; and

sending facility information related to reducing energy.

47. The method according to claim 46 wherein the facility information related to reducing energy is meter data.

48. The method according to claim 46 wherein the facility information related to reducing energy is an amount of kilowatts reduced.

49. The method according to claim 31 further comprising:

obtaining market indicators; and

reducing energy at a facility by comparing market indicators to energy reduction thresholds.

50. The method according to claim 49 further comprising receiving market indicators to obtain market indicators.

51. The method according to claim 50 further comprising assigning at least one generation amount or at least one energy reduction amount to at least one level related to a market indicator for a facility.

52. The method according to claim 51 wherein each level is assigned a different energy reduction threshold and reduces energy in response to market indicators.

53. The method according to claim 31 further comprising:

subscribing to an energy provider for a demand response program;

acknowledging receipt of demand response notices; and

reducing energy for at least one facility.

54. The method according to claim 31 further comprising:

checking a record of a facility'"'"'s energy consumption against a third party'"'"'s record;

calculating a difference between the facility'"'"'s energy consumption record and the third party'"'"'s record; and

adjusting a power metering conversion multiplier for the facility based on the difference.

55. The method according to claim 54 further comprising verifying kilowatts reduced as a result of an energy reduction event.

56. The method according to claim 31 further comprising:

choosing a plurality of facilities as a group for group control; and

setting at least one group energy reduction threshold for the group.

57. The method according to claim 56 further comprising:

acquiring future energy market price information for the group; and

providing a price for energy calendar from the acquired energy market price information for the group.

58. The method according to claim 31 further comprising selecting the highest market indicator times to reduce electrical consumption within a maximum time duration given for that facility.

59. The method according to claim 31 further comprising responding to retail market prices for energy when it is economical to initiate facility power generation for the purpose of reducing supplied energy.

60. The method according to claim 31 further comprising:

dividing a total energy reduction required by a plurality of facilities; and

deciding which facilities will participate based on energy availability at the facilities.

61. The method according to claim 60 further comprising determining energy available at a facility based on which facilities did not participate in a previous energy reduction event.

62. The method according to claim 31 further comprising:

assigning electrical loads participating in energy reduction to aggregate particular types of loads; and

assigning a priority to each electrical load.

63. The method according to claim 31 wherein an energy reduction amount required from a group of facilities is rotated within all facilities in the group.

64. The method according to claim 31 further comprising for a required energy reduction amount, rotating electrical loads that are approved to participate in energy reduction.

65. The method according to claim 31 further comprising rotating the reduction of lighting for the purpose of extending lighting equipment life.

66. The method according to claim 31 further comprising bidding a facility'"'"'s reduction in energy consumption on an energy market as a generation source.

67. The method according to claim 31 further comprising:

monitoring energy reduction at each facility; and

controlling a total aggregated energy reduction amount by changing a facility'"'"'s participation level.

68. The method according to claim 67 wherein aggregated energy reduction is grouping individual sites into a single aggregated energy amount for aggregated kilowatt reduction.

69. The method according to claim 68 further comprising setting individual participation levels for each facility within a group to achieve a group'"'"'s aggregated participation level.

70. The method according to claim 69 further comprising prioritizing facilities within a group for energy reduction based on an economic impact of the energy reduction for individual facilities.

71. The method according to claim 70 further comprising selecting the energy reduction threshold for a facility based on user defined values.

72. The method according to claim 71 wherein a user defined value is an amount of energy reduction.

73. The method according to claim 72 wherein a user defined value is a market indicator.

74. The method according to claim 73 wherein a user defined value is a time of day that a facility is allowed to reduce energy consumption.

75. The method according to claim 74 wherein a user defined value is a minimum and a maximum time that energy within a facility is allowed to be reduced.

76. The method according to claim 75 further comprising initiating additional energy reduction at a facility with multiple levels of participation due to early termination of a level based on maximum times being exceeded.

77. The method according to claim 76 wherein a user defined value is a seasonal value.

78. The method according to claim 77 further comprising determining seasonal values by outside air temperature.

79. The method according to claim 78 further comprising determining seasonal values by referencing postal codes for a facility via a network to obtain weather information.

80. The method according to claim 79 further comprising determining seasonal values by calendar date.

81. The method according to claim 31 wherein a control interface is a building automation system.

82. The method according to claim 31 wherein a control interface is a lighting control system.

83. The method according to claim 31 wherein a control interface is a facility controller.

84. The method according to claim 31 wherein a control interface is an environmental control system.

85. The method according to claim 31 wherein a control interface is an energy management system.

86. The method according to claim 31 wherein a control interface is a process controller.

87. The method according to claim 31 further comprising sending an energy reduction signal to a facility.

88. The method according to claim 87 further comprising sending an energy reduction signal to multiple groups of facilities.

89. The method according to claim 31 further comprising sending notification of a facility'"'"'s upcoming energy reduction events to that facility.

90. The method according to claim 31 further comprising sending notification of a facility'"'"'s current energy reduction event to that facility.

91. A method of controlling energy consumption for a facility comprising:

setting at least one energy reduction threshold;

monitoring a market indicator and reducing energy consumption upon receipt of a market indicator; and

using a time of day schedule that determines the times and days that curtailable energy is available.

92. The method according to claim 91 wherein the time of day schedule comprises days and times for forthcoming calendar months that un-noticeable shed events are allowed.

93. The method according to claim 91 wherein the time of day schedule comprises days and times for forthcoming calendar months that noticeable shed events are allowed.

94. The method according to claim 91 further comprising limiting the time when curtailable energy is available to a maximum or a minimum.

95. The method according to claim 91 further comprising decreasing or increasing electrical energy prioritized based on seasonal values.

96. The method according to claim 95 further comprising determining seasonal values from outside air temperature.

97. The method according to claim 96 further comprising determining seasonal values by referencing a facility'"'"'s postal code via a network to obtain weather information for the facility.

98. The method according to claim 97 further comprising determining seasonal values by date.

99. The method according to claim 91 wherein the energy reduction threshold is determined by seasonal values.

100. The method according to claim 91 wherein the energy reduction for curtailment is determined by seasonal criteria.

101. The method according to claim 91 further comprising:

matching a facility'"'"'s zip code to a latitude/longitude location and date to determine daylight values, and;

determining the availability of electrical load in a facility for curtailment.

102. The method according to claim 101 further comprising combining seasonal values with ambient light information to determine what electrical loads are available for curtailment.

103. A method of controlling energy consumption for a facility comprising:

setting at least one energy reduction threshold;

monitoring a market indicator and reducing energy consumption upon receipt of market indicator; and

retrieving at least one refrigeration defrost schedule for at least one refrigeration system.

104. The method according to claim 103 wherein energy reducing defrost time schedules are adjusted to provide defrosts during energy curtailment events.

105. The method according to claim 104 wherein energy reducing defrosts are time off defrosts.

106. The method according to claim 103 wherein energy consuming defrost time schedules are adjusted to prevent defrost during energy curtailment events.

107. The method according to claim 106 wherein the defrost time schedule adjustment includes canceling the defrost event.

108. The method according to claim 106 wherein the defrost time schedule adjustment includes delaying the defrost event.

109. The method according to claim 106 wherein the defrost time schedule adjustment includes early execution of the defrost event.

110. The method according to claim 106 wherein energy consuming defrosts are further defined as electric defrost.

111. The method according to claim 106 wherein energy consuming defrosts are further defined as hot gas defrosts.

112. The method according to claim 103 further comprising creating a first schedule based on at least one refrigeration defrost schedule in conjunction with the energy market indicator for those defrost times.

113. The method according to claim 112 further comprising creating a second schedule based on at least one refrigeration defrost schedule at times when there is no energy market indicator.

114. The method according to claim 113 further comprising comparing the second schedule against the first schedule to indicate defrost energy savings.

115. The method according to claim 114 further comprising presenting a revised defrost times schedule with the defrost energy savings to the facility for acceptance.

116. The method according to claim 103 further comprising using a market indicator to adjust at least one temperature setpoint a predetermined number of degrees for temperature controlling equipment located at the facility in correspondence with the weather calendar to reduce anticipated facility energy consumption.

117. A method of controlling energy consumption for a facility comprising:

setting at least one energy threshold;

monitoring a market indicator;

communicating with a control interface at a facility for the purpose of increasing energy consumption; and

increasing energy consumption at a facility using the control interface upon receipt of a market indicator if the energy reduction threshold is greater than the market indicator.

118. The method according to claim 117 further comprising:

acquiring forecast weather information;

providing a weather calendar for the facility; and

increasing energy consumption based on weather data.

119. A method of energy curtailment that uses audio or video messages to notify building occupants of an intended energy reduction event at one or more facilities.

120. The method according to claim 119 further comprising an audio or video message with customizable information based on energy saved for at least one facility.

121. The method according to claim 120 further comprising customizable information based on air quality.

122. The method according to claim 119 further comprising:

customizable information based on energy savings as a result of the energy reduction.

123. The method according to claim 119 further comprising the use of a text-to-speech to automatically customize audio and video messages.

124. The method according to claim 119 wherein the audio or video message fading in and out of any audio or video the facility is currently playing.

125. The method according to claim 119 further comprising audio and video files capable of being uploaded to a facility or groups of facilities from a remote location.

126. The method according to claim 119 further comprising multiple audio or video messages played at customizable intervals during the same curtailment event.

127. The method according to claim 119 further comprising selecting different audio or video messages based on energy reduction information.

128. The method according to claim 127 wherein reduction information is market indicators.

129. The method according to claim 127 wherein reduction information is different levels of curtailment.

130. The method according to claim 127 wherein reduction information is seasonal values.

131. The method according to claim 127 wherein reduction information is temperature.

132. The method according to claim 127 wherein reduction information is time of day scheduling.

133. The method according to claim 127 wherein reduction information is whether the energy reduction will be noticed by occupants.

134. A method of controlling energy consumption for a facility by defining an air quality range acceptable to reduce energy within at least one facility.

135. The method according to claim 134 further comprising:

monitoring air quality levels; and

comparing the air quality levels to acceptable air quality levels.

136. The method according to claim 135 wherein acceptable air quality levels are defined by carbon dioxide levels.

137. The method according to claim 136 wherein acceptable air quality levels are defined by carbon monoxide levels.

138. The method according to claim 137 wherein acceptable air quality levels are defined by moisture levels.