SYSTEMS AND METHODS FOR CONTROLLING ENERGY USE DURING A DEMAND LIMITING PERIOD
First Claim
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1. A feedback controller for controlling power consumption by an HVAC system of a building during a demand limiting period, the controller comprising:
- a processing circuit configured to generate a value of a manipulated variable for adjusting the operation of an HVAC device, wherein the processing circuit comprises;
an error analyzer configured to receive an energy use setpoint as a reference input and to receive a measured energy use as a measured input, wherein the error analyzer is further configured to compare the reference input and the measured input, and to use the comparison to determine an error value;
an error corrector configured to receive the error value and to use the error value to generate the value of the manipulated variable during the demand limiting period; and
an energy use setpoint generator configured to calculate the energy use setpoint using a demand limiting technique subject to a constraint defining a threshold value for a condition affected by the energy use setpoint.
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Abstract
Systems and methods for limiting power consumption by a heating, ventilation, and air conditioning (HVAC) subsystem of a building are shown and described. A feedback controller is used to generate a manipulated variable based on an energy use setpoint and a measured energy use. The manipulated variable may be used for adjusting the operation of an HVAC device.
44 Citations
20 Claims
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1. A feedback controller for controlling power consumption by an HVAC system of a building during a demand limiting period, the controller comprising:
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a processing circuit configured to generate a value of a manipulated variable for adjusting the operation of an HVAC device, wherein the processing circuit comprises; an error analyzer configured to receive an energy use setpoint as a reference input and to receive a measured energy use as a measured input, wherein the error analyzer is further configured to compare the reference input and the measured input, and to use the comparison to determine an error value; an error corrector configured to receive the error value and to use the error value to generate the value of the manipulated variable during the demand limiting period; and an energy use setpoint generator configured to calculate the energy use setpoint using a demand limiting technique subject to a constraint defining a threshold value for a condition affected by the energy use setpoint. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for controlling power consumption by an HVAC system of a building during a demand limiting period, the method comprising:
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using an energy use setpoint as a reference input for a feedback controller; using a measured energy use as a measured input for the feedback controller; using the feedback controller to generate a manipulated variable output for adjusting the operation of an HVAC device during the demand limiting period; and calculating the energy use setpoint using a demand limiting technique subject to a constraint defining a threshold value for a condition affected by the energy use setpoint. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A system for controlling power consumption by an HVAC system of a building during a demand limiting period, the system for controlling power consumption comprising:
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a feedback controller configured to use a difference between an energy use setpoint and a measured energy use to generate a value of a manipulated variable for adjusting the operation of an HVAC device during a demand limiting period; and an energy use setpoint generator configured to calculate the energy use setpoint using a demand limiting technique subject to a constraint defining a threshold value for a condition affected by the energy use setpoint. - View Dependent Claims (18, 19, 20)
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Specification