1.5 MW Auto-Cap 1.8 MVar PV 3 MW PV Auto-Cap 1.2 MVar Auto-Cap 1.8 MVar Substation 2 1 R 3 RCS PS PS PS Auto-Cap 1.2 MVar 4 Adjacent Feeders 200 180 180 160 160 140 140 Line Current (A) 200 120 100 80 60 20 φA φB φC 0 12 a.m. 6 a.m. 40 200 180 Line Current (A) 160 120 100 80 60 20 12 p.m. 6 p.m. Time of Day (b) 0 12 a.m. 12 a.m. 200 φA φB φC 180 160 140 120 100 80 60 12 a.m. 12 a.m. 12 p.m. Time of Day (e) 6 p.m. 12 a.m. φA φB φC 80 60 20 6 p.m. 6 p.m. 100 40 12 p.m. Time of Day (d) 12 p.m. Time of Day (c) 120 20 6 a.m. 6 a.m. 140 40 0 12 a.m. φA φB φC 40 Line Current (A) Line Current (A) (a) 0 12 a.m. 6 a.m. figure 4. Locations of the installed line current-sensing data acquisition systems and their recorded current levels for a day in January 2013: (a) a simplified circuit diagram of the Fontana, California, study circuit, (b) line currents at measurement point 1, (c) line currents at measurement point 2, (d) line currents at measurement point 3, and (e) line currents at measurement point 4. monitoring point to collect unbalanced three-phase line current measurements of the distribution circuit's loading with a temporal resolution of 5 s. Data from the individual modified LineTracker 40 units were uploaded to the nearby DataPAC approximately every 40 minutes, and the DataPAC used the march/april 2015 cellular communications network to upload the aggregated circuit data to NREL servers every two hours. Figure 4 shows the type of data supplied by the installed data acquisition systems. Four sets of the modified GridSense LineTracker 40 systems were installed on the Fontana, ieee power & energy magazine 67