System and method for managing AC power using auxiliary DC-to-AC inversion
First Claim
1. A method for managing demand for an alternating current (AC) client using direct current (DC)-to-AC power inversion as an auxiliary source of power, the method comprising:
- providing an AC client with a fluctuating AC grid demand, a DC-to-AC inverter having an input connected to a DC power auxiliary source and selectable inversion power output levels connected to the AC client to supply auxiliary power for a portion of the AC power demand;
averaging the AC grid demand;
in each of a series of periodic time intervals, comparing a current AC grid demand average in a current time interval to a demand goal, which is a highest AC grid demand average as measured at an end of a time interval, and selected from a plurality of time intervals; and
,selecting the DC-to-AC inverter output power level so that the current AC grid demand average is less than or equal to the demand goal by the end of the current time interval.
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Accused Products
Abstract
A system and method are provided for managing demand for a client with a fluctuating AC power grid demand, using DC-to-AC power inversion as an auxiliary source of power. The inverter has a selectable inversion power output levels connected to the AC client to supply auxiliary power for a portion of the AC power demand. The AC grid demand is averaged. In each of a series of periodic time intervals, a current AC grid demand average in a current time interval is compared to a demand goal, which is the highest AC grid demand average, as measured at an end of a time interval, and selected from a plurality of time intervals. The inverter output power level is selected so that the current AC grid demand average is less than or equal to the demand goal by the end of the current time interval.
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Citations
24 Claims
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1. A method for managing demand for an alternating current (AC) client using direct current (DC)-to-AC power inversion as an auxiliary source of power, the method comprising:
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providing an AC client with a fluctuating AC grid demand, a DC-to-AC inverter having an input connected to a DC power auxiliary source and selectable inversion power output levels connected to the AC client to supply auxiliary power for a portion of the AC power demand; averaging the AC grid demand; in each of a series of periodic time intervals, comparing a current AC grid demand average in a current time interval to a demand goal, which is a highest AC grid demand average as measured at an end of a time interval, and selected from a plurality of time intervals; and
,selecting the DC-to-AC inverter output power level so that the current AC grid demand average is less than or equal to the demand goal by the end of the current time interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for managing demand for an alternating current (AC) client using direct current (DC)-to-AC power inversion as an auxiliary source of power, the system comprising:
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a DC-to-AC inverter having an input connected to a DC power auxiliary source and selectable inversion power output levels connected to an AC client to supply auxiliary power for a portion of a fluctuating AC grid demand; a measurement module having an interface connected to the AC client, the measurement module averaging the AC grid demand, and in each of a series of periodic time intervals, comparing a current AC grid demand average in a current time interval to a demand goal, which is a highest AC grid demand average as measured at an end of a time interval, and selected from a plurality of time intervals; and
,a controller having an interface connected to the DC-to-AC inverter and measurement module, the controller selecting the DC-to-AC inverter output power level so that the current AC grid demand average is less than or equal to the demand goal by the end of the current time interval. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification