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US 7,459,803 B2Granted
Iso-parallel UPS system configuration
AssigneeIsolated Parallel Inc.
InventorMichael J. Mosman
Life of this patent
Estimating the term…
Abstract
An Iso-Parallel UPS system may combine the system redundancy, isolation and fault-limiting properties of isolated-redundant systems, with the ability to spread system load evenly across all modules like paralleled systems. This system may have the following features: (1) the critical load can be divided into two or more portions, and each portion may be individually fault tolerant, i.e., any electrical fault on a critical load will affect only the load in that portion—other portions of the critical load can remain connected and operating; (2) the critical load can be shared among all modules within the configuration, and all modules may be equally loaded, or nearly equally loaded—there is no designated redundant unit; and (3) any module can be taken out for maintenance without impacting the critical load.
Claims23
An isolated-parallel UPS configuration comprising:
- two diesel UPS systems, operating at either low voltage, medium voltage or a combination or low and medium voltage, adapted to supply power from a utility power source to corresponding dedicated essential and critical loads, the diesel UPS systems adapted to operate as independent systems, each diesel UPS system including an inductive reactor (choke) adapted to condition utility power for use in critical loads, a diesel engine adapted to supply a long-duration alternate source of power for both critical and essential loads upon interruption of the utility power source, and an energy storage mechanism coupled to a motor-generator and adapted to supply a short-duration alternate source of uninterrupted power to its critical load upon the onset of power interruption for a period of time required for the diesel engine-generator to start and take over support of the critical loads;
- a system switchboard for each diesel UPS system adapted to accommodate transferring essential and critical loads between utility power and diesel engine power;
- an output bus for each diesel UPS system adapted to accommodate the attachment of the inductive reactor and motor-generator to critical loads and to facilitate the transfer of critical load to and from utility, diesel engine and short-duration power sources;
- and
- at least one IP choke adapted to connect to the output bus of one of the Diesel UPS Systems adapted to allow power to flow from one output bus to the other output bus and to limit fault current between the diesel UPS systems, thereby isolating each diesel UPS system from faults on the other diesel UPS system.
2 more elements
An isolated-parallel UPS configuration comprising:
- two diesel UPS systems, operating at either low voltage, medium voltage or a combination or low and medium voltage, adapted to supply power from a utility power source to corresponding dedicated essential and critical loads, the diesel UPS systems adapted to operate as independent systems, each diesel UPS system including an inductive reactor (choke) adapted to condition utility power for use in critical loads, a diesel engine adapted to supply a long-duration alternate source of power for both critical and essential loads upon interruption of the utility power source, and an energy storage mechanism coupled to a motor-generator and adapted to supply a short-duration alternate source of uninterrupted power to its critical load upon the onset of power interruption for a period of time required for the diesel engine-generator to start and take over support of the critical loads;
- a system switchboard for each diesel UPS system adapted to accommodate transferring essential and critical loads between utility power and diesel engine power;
- an output bus for each diesel UPS system adapted to accommodate the attachment of the inductive reactor and motor-generator to critical loads and to facilitate the transfer of critical load to and from utility, diesel engine and short-duration power sources;
- a common synchronizing paralleling bus connected to the output busses and adapted to support exchanges of power between the diesel UPS systems;
- and
- at least one IP choke associated with each diesel UPS system and adapted to connect the output bus of the associated diesel UPS system to the synchronizing paralleling bus, to limit fault current into and out of the diesel UPS systems, thereby isolating faults to a single one of the diesel UPS systems.
3 more elements
An isolated-parallel engine-generator configuration comprising:
- at least two diesel engine-generators, operating at either low voltage or medium voltage, adapted to supply power to at least two corresponding dedicated essential loads, each diesel engine-generator being connected to a system switchboard to supply an alternate source of power to each of the essential loads upon interruption of a utility power source;
- a common synchronizing paralleling bus connected to the diesel engine-generators and adapted to support exchanges of power between the diesel engine-generators at their system switchboards;
- and
- at least one IP choke associated with each diesel engine-generator and connected between the system switchboard of the associated diesel engine-generator and the common synchronizing paralleling bus to limit fault current into and out of the system switchboards, thereby isolating faults to a single engine-generator or system switchboard.
1 more element
An isolated-parallel UPS configuration comprising:
- at least two static UPS systems adapted to supply power from a utility power source to corresponding dedicated critical loads, the UPS systems adapted to operate as independent systems, and each UPS system including means for conditioning utility power for use in critical loads, and an energy storage mechanism adapted to supply a short-duration alternate source of uninterrupted power to its critical load upon the onset of power interruption for the duration of time required for a long-duration alternate power source to become engaged;
- a system switchboard for each static UPS System adapted to accommodate transferring UPS system and/or its critical loads between utility power and the long-duration alternate power source;
- an output bus for each static UPS system adapted to accommodate the attachment of the UPS system to critical loads and to facilitate the bypass of critical load around the UPS system;
- a common synchronizing paralleling bus connected to the output busses and adapted to support exchanges of power between the static UPS systems;
- and
- at least one IP choke associated with each static UPS system and adapted to connect the output bus of the associated UPS system to the synchronizing paralleling bus, to limit fault current into and out of the UPS systems, thereby isolating faults to a single one of the static UPS systems.
3 more elements
Dependencies are inferred from the claim text.