Systems, methods, and devices for control of multimode UPS
AssigneeGeneral Electric Company
InventorLorenzo Giuntini
Life of this patent
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Abstract
Systems and methods are provided to control a multimode uninterruptible power supply (UPS) using external information relevant to the stability of the power source. In one example, a UPS system may include at least one inverter feed path and at least one bypass feed path. A controller may command the inverter feed path and the bypass feed path based at least in part on information relevant to the stability of the power source that supplies the first inverter feed path or the first bypass feed path, or both. This information relevant to the stability of the power source may derive from at least one information provider external to the UPS system.
Claims19
An uninterruptible power supply (UPS) system comprising:
- a first inverter feed path comprising a rectifier in series with an inverter to supply a first amount of power to a load based at least in part on a first command;
- a first bypass feed path in parallel with the inverter feed path to supply a second amount of power to the load based at least in part on a second command;
- and
- a controller to generate the first and second commands to vary the first amount of power and the second amount of power based at least in part on information relevant to the stability of a power source that supplies the first inverter feed path or the first bypass feed path, or both, wherein the information relevant to the stability of the power source derives from at least one information provider external to the UPS system, wherein the controller is configured:
- when the information relevant to the stability of the power source indicates that a likelihood of a power supply disturbance is within an allowable likelihood, to generate the first and second commands based at least in part on whether an electrical measurement of power flowing through the uninterruptible power supply is outside a first limit;
- and
- when the information relevant to the stability of the power source indicates that the likelihood of the power supply disturbance is not within the allowable likelihood, to generate the first and second commands based at least in part on whether the electrical measurement of power flowing through the uninterruptible power supply is outside a second limit more protective than the first limit.
An article of manufacture comprising:
- one or more tangible, machine-readable media at least collectively comprising machine-executable instructions, the instructions comprising:
- instructions to receive information relevant to a stability of a power source that supplies power to at least one uninterruptible power supply (UPS), wherein the information relevant to the stability of the power source derives from at least one information provider located off-site from the at least one UPS;
- instructions to estimate a likelihood of a power supply disturbance in the at least one UPS based at least in part on the information relevant to the stability of the power source;
- and
- instructions to cause the at least one UPS to operate in a more protective mode when the likelihood of the power supply disturbance exceeds an allowable likelihood, wherein the instructions to cause the at least one UPS to operate in a more protective mode comprise instructions to cause the at least one UPS to more evenly distribute power supplied in parallel by multiple individual UPS s comprised by the at least one UPS.
A method for controlling a multimode uninterruptible power supply (UPS) that receives power from a power grid, the method comprising:
- causing the UPS to operate in a first mode when information relevant to the stability of the power grid indicates a first likelihood of disturbances, wherein the information relevant to the stability of the power grid derives from at least one information provider remote from the UPS;
- and
- causing the UPS to operate in a second mode when the information relevant to the stability of the power grid indicates a second likelihood of disturbances, wherein the second likelihood of disturbances is higher than the first likelihood of disturbances and the second mode is more protective than the first mode;
- wherein causing the UPS to operate in the first mode comprises causing the UPS to supply more power via a bypass feed path of the UPS than an inverter feed path of the UPS and wherein causing the UPS to operate in the second mode comprises causing the UPS to supply more power via the inverter feed path of the UPS than the bypass feed path of the UPS.
Dependencies are inferred from the claim text.