Energy storage peak shaving of electrical power for facilities

A system for shaving peak power consumption by a facility, the system comprising:

• a controller configured to:
• determine a target peak demand setpoint for the facility, wherein the controller is configured to determine the target peak demand setpoint for a billing cycle;
• measure power consumed by the facility;
• cause an electrical storage system (ESS) to be charged with power from a utility when the measured power consumption is below the target peak demand setpoint;
• cause the ESS to discharge and provide power to the facility while the facility simultaneously receives power from the utility when the measured power consumption is above the target peak demand setpoint;
• and
• dynamically update, during the billing cycle, the target peak demand setpoint based on one or more changed conditions;
• wherein the controller is configured to initially determine the target peak demand setpoint by (i) determining a first optimal target peak demand setpoint using first demand load data from a time period immediately prior to a current billing cycle, (ii) determining a second optimal target peak demand setpoint using second demand load data from a billing cycle from a historical time period, and (iii) weighting the first and second optimal target peak demand setpoints;
• and
• wherein the controller is configured to determine each of the first and second optimal target peak demand setpoints using a process that (i) determines an initial target peak demand setpoint value by filtering out selected time segments and a nominal load from at least one of the first and second demand load data, (ii) iteratively modifies the initial target peak demand setpoint value according to one or more efficiency characteristics of the ESS until the modified target peak demand setpoint value is not economically feasible in view of the one or more efficiency characteristics of the ESS and one or more utility rates associated with the utility, and (iii) uses a last economically feasible target peak demand setpoint value among prior iterations as the first or second optimal target peak demand setpoint.

A non-transitory computer readable medium containing instructions that when executed cause at least one processing device to:

• determine a target peak demand setpoint for a facility, wherein the target peak demand setpoint is determined for a billing cycle;
• measure power consumed by the facility;
• cause an electrical storage system (ESS) to be charged with power from a utility when the measured power consumption is below the target peak demand setpoint;
• cause the ESS to discharge and provide power to the facility while the facility simultaneously receives power from the utility when the measured power consumption is above the target peak demand setpoint;
• and
• dynamically update, during the billing cycle, the target peak demand setpoint based on one or more changed conditions;
• wherein the target peak demand setpoint is determined initially by (i) determining a first optimal target peak demand setpoint using first demand load data from a time period immediately prior to a current billing cycle, (ii) determining a second optimal target peak demand setpoint using second demand load data from a billing cycle from a historical time period, and (iii) weighting the first and second optimal target peak demand setpoints;
• and
• wherein each of the first and second optimal target peak demand setpoints is determined using a process that (i) determines an initial target peak demand setpoint value by filtering out selected time segments and a nominal load from at least one of the first and second demand load data, (ii) iteratively modifies the initial target peak demand setpoint value according to one or more efficiency characteristics of the ESS until the modified target peak demand setpoint value is not economically feasible in view of the one or more efficiency characteristics of the ESS and one or more utility rates associated with the utility, and (iii) uses a last economically feasible target peak demand setpoint value among prior iterations as the first or second optimal target peak demand setpoint.