Flexible load management system
A flexible load management (FLM) system and technique adaptively monitors and manages power consumption of a premises. The FLM system includes a virtual critical load panel (vCLP) that utilizes circuit breakers in combination with companion modules (i.e., intelligent controllers) to vary a prioritization arrangement of loads in the premises by time of day, season or even dynamically. The vCLP is a prioritized enumeration (i.e., prioritization) of the loads within the premises, wherein the loads are considered sufficiently important such that they are protected by a local power source. The vCLP is dynamically configurable by a user in real time according to an instantaneous demand for the prioritized loads that is used to determine a number of branch circuits associated with the loads that is able to be powered-on at any time.
1. A method comprising:
collecting load data from one or more branch circuits connected to an electrical panel, wherein each branch circuit is monitored by an associated module configured to one of activate or deactivate a respective breaker in response to a load on a respective branch circuit;
determining a reserve capacity as a percentage of a system capacity of power to the electrical panel based on a reserve threshold of power;
computing an available power capacity by subtracting the load data from the system capacity; and
updating a first group of modules to deactivate the respective breaker in response to the available power capacity falling below the reserve capacity from an increase in the load on the respective branch circuit.
2. The method of claim 1 further comprising updating a second group of modules to deactivate, wherein the second group of modules have a lower priority than the first group of modules.
3. The method of claim 2 wherein loads on respective branch circuits of the second group of modules have pre-determined power profiles with known maximum power consumption.
4. The method of claim 2 wherein loads on respective branch circuits of the second group of modules are without pre-determined power profiles.
5. The method of claim 1 further comprising updating a second group of modules to activate in response to the available power capacity increasing above the reserve capacity.
6. The method of claim 1 further comprising updating a second group of modules to maintain activation in response to the available power capacity falling below the reserve capacity, wherein the second group of modules have a higher priority than the first group of modules.
7. The method of claim 1 wherein updating the first group of modules occurs at least once a second.
8. The method of claim 1 further comprising, in response to a failure of power from a public utility, configuring the modules to activate serially from a local power source.
9. The method of claim 1 further comprising smoothing the load data prior to computing the available power capacity.
10. The method of claim 1 wherein the determined reserve capacity is at least 5 percent of the system capacity.
11. An apparatus comprising:
an energy monitor having a processor coupled to one or more modules, each module monitoring a branch circuit of an electrical panel, wherein each module is configured to one of activate or deactivate a respective breaker in response to a load on a respective branch circuit, the processor configured to,
collect load data from the modules;
determine a reserve capacity as a percentage of a system capacity of power to the electrical panel based on a reserve threshold of power;
compute an available power capacity by subtracting the load data from the system capacity; and
update a first group of modules to deactivate the respective breaker in response to the available power capacity falling below the reserve capacity from an increase in the load on the respective branch circuit.
12. The apparatus of claim 11 , wherein the processor is further configured to update a second group of modules to deactivate, wherein the second group of modules have a lower priority than the first group of modules.
13. The apparatus of claim 12 wherein loads on respective branch circuits of the second group of modules have pre-determined power profiles with known maximum power consumption.
14. The apparatus of claim 12 wherein loads on respective branch circuits of the second group of modules are without pre-determined power profiles.
15. The apparatus of claim 11 wherein the processor is further configured to update a second group of modules to activate in response to the available power capacity increasing above the reserve capacity.
16. The apparatus of claim 11 wherein the processor is further configured to update a second group of modules to maintain activation in response to the available power capacity falling below the reserve capacity, wherein the second group of modules have a higher priority than the first group of modules.
17. The apparatus of claim 11 wherein updating the first group of modules occurs at least once a second.
18. The apparatus of claim 11 wherein the processor is further configured to, in response to a failure of power from a public utility, configure the modules to activate serially from a local power source.
19. The apparatus of claim 11 further comprising smoothing the load data prior to computing the available power capacity.
20. A non-transitory computer readable medium having program instructions configured for execution on a processor, the program instructions configured to:
collect load data from one or more branch circuits connected to an electrical panel, wherein each branch circuit is monitored by an associated module configured to one of activate or deactivate a respective breaker in response to a load on a respective branch circuit;
determine a reserve capacity as a percentage of a system capacity of power to the electrical panel based on a reserve threshold of power;
compute an available power capacity by subtracting the load data from the system capacity; and
update a first group of modules to deactivate the respective breaker in response to the available power capacity falling below the reserve capacity from an increase in the load on the respective branch circuit.