2014 PV Distribution System Modeling Workshop: Advanced Inverters Analysis on a Distribution Feeder: Jeff Smith, EPRI

1. Jeff Smith
Manager, Power System Studies
PV Distribution System Modeling Workshop
5/6/2014
Smart Inverters – Modeling to
Determine “Best” Settings
Prelude to tomorrow’s Workshop

2. 2© 2014 Electric Power Research Institute, Inc. All rights reserved.
What Smart Inverter Settings are “Best?”
0.9 0.95 1 1.05 1.1
-100
-50
0
50
100
Voltvar Curve-No Dead Band
Voltage (pu)
Availablevar(%)

3. 3© 2014 Electric Power Research Institute, Inc. All rights reserved.
0.9 0.95 1 1.05 1.1
-100
-50
0
50
100
Voltvar Curve-with Dead Band
Voltage (pu)
Availablevar(%)
What Smart Inverter Settings are “Best?”

4. 4© 2014 Electric Power Research Institute, Inc. All rights reserved.
0.9 0.95 1 1.05 1.1
-100
-80
-60
-40
-20
0
Voltvar Curve-Inductive only
Voltage (pu)
Availablevar(%)
What Smart Inverter Settings are “Best?”

5. 5© 2014 Electric Power Research Institute, Inc. All rights reserved.
0.95 1 1.05 1.1 1.15
0
10
20
30
40
50
60
70
80
90
100
Voltwatt Curve
Voltage (pu)
Wattoutput(%)
What Smart Inverter Settings are “Best?”

6. 6© 2014 Electric Power Research Institute, Inc. All rights reserved.
What Smart Inverter Settings are “Best?”
0 5 10 15 20 25
1.024
1.026
1.028
1.03
1.032
1.034
1.036
1.038
1.04
1.042
1.044
Hour
Voltage(pu)
Voltages with different voltvar settings
---- Voltvar
---- No PV
---- PV base
Daily Feeder Voltage Profile with different volt/var setpoints