IEEE Power & Energy Magazine - March/April 2015 - 67

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



Table of Contents for the Digital Edition of IEEE Power & Energy Magazine - March/April 2015

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IEEE Power & Energy Magazine - March/April 2015 - Cover3
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