Abstract:
Methods, systems, and computer readable media for providing protection of DC building electrical systems are disclosed. According to one aspect, a system for over-current protection of direct current (DC) building electrical systems includes a DC bus for providing DC power to a building and multiple DC feeder conductors for providing DC power to multiple locations within the building. Each DC feeder conductor is connected to the DC bus via a DC protection module having a fuse, a normally closed switch connected in parallel with the fuse, and a circuit breaker connected in series with the fuse and switch, where the switch is controllable to be closed to protect the fuse against transient current conditions and controllable to be open after the transient current conditions have subsided to allow the fuse to operate normally.
Abstract:
A microgrid includes a plurality of distributed energy resources such as controllable distributed electric generators and electrical energy storage devices. A method of controlling operation of the microgrid includes periodically updating a distributed energy resource schedule for the microgrid that includes on/off status of the controllable distributed electric generators and charging/discharging status and rate of the electrical energy storage devices and which satisfies a first control objective for a defined time window, based at least in part on a renewable energy generation and load forecast for the microgrid. The method further includes periodically determining power set points for the controllable distributed energy resources which satisfy a second control objective for a present time interval within the defined time window, the second control objective being a function of at least the distributed energy resource schedule for the microgrid.
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.
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.
Abstract:
A microgrid includes a plurality of distributed energy resources such as controllable distributed electric generators and electrical energy storage devices. A method of controlling operation of the microgrid includes periodically updating a distributed energy resource schedule for the microgrid that includes on/off status of the controllable distributed electric generators and charging/discharging status and rate of the electrical energy storage devices and which satisfies a first control objective for a defined time window, based at least in part on a renewable energy generation and load forecast for the microgrid. The method further includes periodically determining power set points for the controllable distributed energy resources which satisfy a second control objective for a present time interval within the defined time window, the second control objective being a function of at least the distributed energy resource schedule for the microgrid.
Abstract:
Methods, systems, and computer readable media for managing the distribution of photovoltaic power in a multi-floor building are disclosed. According to one aspect, a method includes determining power requirements for each of a plurality of loads associated with a respective plurality of floors in a multi-floor building, wherein each of the plurality of floors includes a direct current (DC) distribution bus. The method further includes using a PV converter to supply a power output from a PV source to one or more of the plurality of loads via one or more respective DC distribution buses, wherein the power output is supplied to the one or more of the plurality of loads in an order such that each subsequent load is supplied at least a remaining portion of the power output after the power requirements of a previously supplied load is fully satisfied.