Hybrid alternating current (AC)/direct current (DC) distribution for multiple-floor buildings
AssigneeABB Schweiz AG
InventorsJing Xu, Zhenyuan Wang, Waqas Arshad, Joseph A. Carr
Life of this patent
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Abstract
A hybrid alternating current (AC)/direct current (DC) distribution system for multiple-floor buildings includes per-floor rectifiers for converting supply side AC to DC. Each rectifier is configured to supply a plurality of DC loads associated with one floor of a multiple-floor building. The system further includes per-floor DC busses, each of the DC busses being configured to distribute the DC to the DC loads its respective floor. The system further includes at least one AC bus for supplying AC power to AC loads in the building.
Claims23
A hybrid alternating current (AC)/direct current (DC) distribution system for multiple-floor buildings, the system comprising:
- a plurality of per-floor rectifiers for converting supply side AC to DC, each rectifier being configured to supply a plurality of DC loads associated with one floor of a multiple-floor building;
- a plurality of per-floor DC busses, each of the DC busses being configured to distribute the DC to the DC loads on its respective floor;
- at least one AC bus configured to supply AC to AC loads in the building;
- and
- at least one DC uninterruptible power supply (UPS) coupled to the per-floor DC busses for maintaining a predetermined DC voltage on each of the per-floor DC busses in the event of an AC power interruption, wherein the at least one DC UPS comprises a plurality of per-floor DC UPSs, each per-floor DC UPS configured to maintain the predetermined DC voltage on its respective floor in the event of an AC power interruption, wherein each per-floor DC UPS includes a battery having a controlled connection to the DC bus supplying the DC loads on its respective floor, and wherein the controlled connection includes a pair of silicon controlled rectifier (SCR) devices connected in parallel with each other, a switch connected in series with the SCR devices between the battery and the DC bus, and a controller for controlling operation of the SCR devices and the switch to control the connection of the battery to the DC bus and to control charging of the battery.
A hybrid alternating current (AC)/direct current (DC) distribution method for multiple-floor buildings, the method comprising:
- rectifying supply side AC to DC using a plurality of per-floor rectifiers configured to convert the supply side AC to DC on its respective floor of a multiple floor building and to supply a plurality of DC loads on its respective floor;
- distributing, using a plurality of per-floor DC buses, the DC to the DC loads;
- and
- supplying AC power to AC loads in the building;
- and
- maintaining a predetermined DC voltage level on the per-floor DC busses in the event of an AC power interruption, wherein maintaining the predetermined DC voltage level on the per-floor DC busses comprises providing a plurality of per-floor uninterruptible power supplies (UPSs), each per-floor UPS being configured to maintain the predetermined DC voltage on its respective floor in the event of an AC power interruption, wherein each per-floor UPS includes a battery having a controlled connection to the DC bus on its respective floor during charging and discharging, and wherein maintaining the predetermined DC voltage level on the per-floor DC busses comprises providing a pair of silicon controlled rectifier (SCR) devices connected in parallel with each other, a switch connected in series with the SCR devices between the battery and each per-floor DC bus, and a controller for controlling operation of the SCR devices and the switch to control the connection of the battery to the DC bus and to control charging of the battery.
Dependencies are inferred from the claim text.