Method for Determining Power Consumption of Loads in Ungrounded Power Distribution Systems

A method for determining power consumption of a load in a feeder section of an ungrounded power distribution system, wherein the ungrounded power distribution system includes a set of feeder sections connected to a feeder, wherein each feeder section includes a set of loads connected by line segments, wherein borders of a line segment are defined by a pair of buses, wherein borders of the feeder section are defined by an importing device connecting the feeder section to an upstream feeder section, and by at least one exporting device connecting the feeder section with a downstream feeder section, comprising:

• representing a power consumption of each load in the feeder section as a product of a scaling factor and a base power defined by a load profile of the load;
• solving a power flow of the feeder section using the power consumptions of the loads by treating the buses of importing device as a constant voltage bus and the buses of exporting devices as a constant power bus to produce an active power for each phase of the importing device;
• determining a target active power for each phase of the importing device using measurements at the importing device;
• and
• updating the scaling factors based on a difference between the active power and the target active power of the importing device, wherein steps of the method are performed by a processor.