UPS with peak-shaving and energy time shifting functions system
AssigneeOn Energy Storage, Inc.
InventorRicardo De Azevedo
Life of this patent
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Abstract
The current invention relates to an uninterruptible power supply (UPS) with PeakShaving and energy time shifting functions system comprising at least one UPS comprising an AC/DC conversion stage, a DC/AC conversion stage, and at least one Energy Storage System (ESS); an Energy Management System (EMS) configured to control the system: at least one processor, and at least one non-transitory computer readable media comprising software; wherein the software causes the processor to configure the system to operate according to different operating stages.
Claims34
An uninterruptible power supply (UPS) system with Peak-Shaving and energy time shifting functions comprising:
- at least one UPS comprising a rectifier, an inverter, and at least one Energy Storage System (ESS);
- an Energy Management System (EMS) configured to control the system upon detection of predetermined power quality events, changed electricity rates, or power demand or capacity charges;
- at least one processor;
- and
- at least one non-transitory computer readable media comprising software, wherein the software causes the at least one processor to configure the system to operate according to operating stages comprising:
- a charge stage, wherein the system is configured to (i) power a load by a power source and (ii) keep the at least one ESS fully charged, wherein the configuration provides a back-to-back UPS operation;
- a discharge stage, wherein the system is configured to (i) reduce or prevent drawing power from the power source and (ii) draw power from the at least one ESS;
- a bidirectional stage, wherein the system is configured to discharge energy to a state of charge (SOC) from the at least one ESS to the power source;
- a recharge stage, wherein the system is configured to (i) control charging of the at least one ESS, wherein the controlling is based on a demand or a state of charge (SOC) thereof and (ii) maintain the at least one ESS upon an established threshold;
- and
- a stand-by stage, wherein the system is configured to (i) draw an amount of current from the power source that is exactly equal to an amount of current needed by the load and (ii) prevent charge or discharge of the at least one ESS.
A method for operating an uninterruptible power supply (UPS) system with Peak-Shaving and energy time shifting functions, the method comprising, upon detection of predetermined power quality events, changed electricity rates, or power demand or capacity charges:
- (a) configuring the system to a charge stage by (i) powering a load by a power source and (ii) keeping at least one energy storage system (ESS) fully charged, wherein the configuring in (a) provides a back-to-back UPS operation;
- (b) configuring the system to a discharge stage by (i) reducing or preventing power drawn from the power source and (ii) drawing power from the at least one ESS;
- (c) configuring the system to a bidirectional stage by discharging energy to a state of charge (SOC) from the at least one ESS to the power source;
- (d) configuring the system to a recharge stage by (i) controlling charging of the at least one ESS, wherein the controlling is based on a demand or a state of charge (SOC) thereof and (ii) maintaining the at least one ESS upon an established threshold;
- and
- (e) configuring the system to a stand-by stage by (i) drawing an amount of current from the power source that is exactly equal to an amount of current needed by the load and (ii) preventing charge or discharge of the at least one ESS.
A non-transitory computer readable media that comprises a software or executable instructions to operate an uninterruptible power supply (UPS) system with Peak-Shaving and energy time shifting functions, the instructions comprising, upon detection of predetermined power quality events, changed electricity rates, or power demand or capacity charges:
- (a) configuring the system to a charge stage by (i) powering a load by a power source and (ii) keeping at least one energy storage system (ESS) fully charged, wherein the configuring in (a) provides a back-to-back UPS operation;
- (b) configuring the system to a discharge stage by (i) reducing or preventing power drawn from the power source and (ii) drawing power from the at least one ESS;
- (c) configuring the system to a bidirectional stage by discharging energy to a state of charge (SOC) from the at least one ESS to the power source;
- (d) configuring the system to a recharge stage by (i) controlling a charging current to the at least one ESS, wherein the controlling is based on a demand or a state of charge (SOC) thereof and (ii) maintaining the at least one ESS upon an established threshold;
- and
- (e) configuring the system to a stand-by stage by (i) drawing an amount of current from the power source that is exactly equal to an amount of current needed by the load and (ii) preventing charging or discharging of the at least one ESS.
An uninterruptible power supply (UPS) system with Peak-Shaving and energy time shifting functions, the system comprising:
- at least one UPS comprising at least one Power Conversion System (PCS) and at least one Energy Storage System (ESS);
- an Energy Management System (EMS) configured to control the system upon detection of predetermined power quality events, changed electricity rates, or power demand or capacity charges;
- at least one processor;
- and
- at least one non-transitory computer readable media comprising software, wherein the software causes the processor to configure the system to operate according to operating stages comprising:
- a charge stage, wherein the system is configured to (i) power a load by a power source and (ii) keep the at least one ESS fully charged, wherein the configuration provides a back-to-back UPS operation;
- a discharge stage, wherein the system is configured to (i) reduce or prevent drawing power from the power source and (ii) draw power from the at least one ESS;
- a bidirectional stage, wherein the system is configured to discharge energy to a state of charge (SOC) from the at least one ESS to the power source;
- a recharge stage, wherein the system is configured to (i) control charging of the at least one ESS, wherein the controlling is based on a demand or a state of charge (SOC) thereof and (ii) maintain the at least one ESS upon an established threshold, wherein the configuration is obtained by enabling the at least one PCS to 0%-100%;
- and
- a stand-by stage, wherein the system is configured to (i) draw an amount of current from the power source that is exactly equal to an amount of current needed by the load and (ii) prevent charge or discharge of the at least one ESS, wherein the configuration is obtained by commanding the at least one PCS in real-time.
Dependencies are inferred from the claim text.