Method and System For Load Shifting
AssigneeHalton Hills Hydro, Inc.
InventorsDan Guatto, Art Skidmore
Life of this patent
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Abstract
There is provided a system for storing electrical energy during an off-peak period and distributing the electrical energy to consumers during a peak period. The system includes an energy storage means for storing the electrical energy; a first means for directing the electrical energy produced during the off-peak period into the energy storage means; and a second means for directing the electrical energy from the energy storage means to consumers during the peak period. Preferably, the energy storage means consists of five sodium-nickel-chloride batteries having a specific energy in the range of about 80 to about 200 Wh/kg, preferably about 100 to about 150 Wh/kg, and most preferably about 120 Wh/kg.
Claims12
A system for storing electrical energy during an off-peak period and distributing the electrical energy during a peak period, wherein the system comprises:
- (a) an energy storage means for storing the electrical energy;
- (b) a first means for directing the electrical energy produced during the off-peak period into the energy storage means;
- and
- (c) a second means for directing the electrical energy from the energy storage means during the peak period,
- wherein the energy storage means is at least one sodium-nickel-chloride battery having a specific energy in the range of about 80 to about 200 Wh/kg, preferably about 100 to about 150 Wh/kg, and most preferably about 120 Wh/kg.
A method of storing electrical energy during an off-peak period and distributing the stored electrical energy to a power grid for use by consumers during a peak period, the method comprising the steps of:
- (a) directing electrical energy that is produced during the off-peak period into an energy storage means;
- (b) storing the electrical energy in the energy storage means until the peak period;
- and
- (c) directing the stored electrical energy from the energy storage means into the power grid for use by the consumers during the peak period,
- wherein the energy storage means is at least one sodium-nickel-chloride battery having a specific energy in the range of about 80 to about 200 Wh/kg, preferably about 100 to about 150 Wh/kg, and most preferably about 120 Wh/kg.
An electrical load levelling system for storing electrical energy during an off-peak period and distributing the electrical energy to consumers during a peak period, wherein the system comprises:
- (a) at least one charger for converting alternating current into direct current,
- (b) a multiple battery server for controlling the flow of the alternating current into the at least one charger,
- (c) at least one energy storing device for storing the direct current electrical energy from a corresponding charger,
- (d) an inverter for inverting the direct current electrical energy into alternating current electrical energy, and
- (e) a power management cabinet for controlling the discharge of the stored electrical energy from each storage device to the inverter, and for directing the alternating current electrical energy to the consumers during peak periods,
- wherein the energy storage device is a sodium-nickel-chloride battery having a specific energy in the range of about 80 to about 200 Wh/g, preferably about 100 to about 150 Wh/kg, and most preferably about 120 Wh/kg.
Dependencies are inferred from the claim text.