welcome to pv grid integration workshop

1. 1
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Organized by:
Robert Broderick, Sandia
and Tom Key, EPRI
PV Systems Symposium
Santa Clara, CA
May 10, 2016
Welcome to
PV-Grid Integration Workshop

2. 2
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Changing Landscape: An Integrated Grid is a Better Grid
Combined Heat & Power
Demand Response
Energy
Management
Rooftop Solar
Electric
Vehicles
Energy Storage
Two Way
Power

3. 3
© 2016 Electric Power Research Institute, Inc. All rights reserved.
From EIA Database
US, March 2016 Electricity Report
History of U.S. Net Generation (billion kWh)

4. 4
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Solar PV, a key driver of change
DOE “SunShot” Vision Study,
Released February 2012
Is the grid ready for PV?
US Future?
302 GW PV
by 2030
Germany Now – Power Demand
for one week in May 2015
60 GW
Export Import

5. 5
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Interconnection Challenge: Solar output variability
Calendar based on irradiance, 1-min averages at 30° fixed tilt, Knoxville
1 2 3 4 5
6 7 8 9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30
Tue Wed Thu Fri SatSun Mon
April 2014

6. 6
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Single-Module Ramp Events on 1-MW Site in TN
Measured 1-sec output from a 224-W module with micro-inverter
(Sep 29, 2011)... 13:10 13:11 13:12 13:13 13:14
0
0.05
0.1
0.15
0.2
0.25
X: 29-Sep-2011 13:10:23
Y: 0.03976
ACPower(kW)
Single-Module PV System Power Production Profile
Local Date & Time (Eastern)
X: 29-Sep-2011 13:10:09
Y: 0.2183
X: 29-Sep-2011 13:11:31
Y: 0.03838
X: 29-Sep-2011 13:11:40
Y: 0.2219
–0.18kW in 24 sec
(3.3% per sec)
+0.18kW in 9 sec
(9.1% per sec)

7. 7
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Spatial- and time-based PV-feeder demo
Search: “Youtube Epri Pv Penetration”

8. 8
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Potential Grid Issues with PV Variability
Voltage Control
• Overvoltage
• Voltage variations
Equipment Operation
• Feeder regulators,
• Load tap changers
• Switched capacitor banks
Demand/Energy
• “Masking” peak demand
• Unbalancing supply and demand
System Protection
• Relay desensitization, networks
• Breaker reduction of reach
• Unintentional islanding
Power Quality
• Harmonic generation
• Flicker worries
limit
FeederImpact Increasing penetration (kW)
No Issues Possible issues Probable issues
Ability for distribution to host
DER is dictated by many
factors

9. 9
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Today’s PV Grid Integration Workshop Agenda
Distribution Modeling for Planning and Screening
Technical and Policy Challenges of High
Penetration PV on the Distribution System
Advanced Inverter Functionality
Lunch
Advanced Inverter Functionality (continued)
Solar Variability Impacts to the Distribution
System
Distribution Control and Operation Management
with High PV Deployment Levels

10. 10
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Upcoming and Integration-related events
43rd IEEE PV Specialists Conference, Portland OR, June
6-10, 2016
IEEE Power and Energy Society Annual Conference,
Boston, MA, July 18-21
1st Annual Microgrid System Symposium on Integration
and Applications, Baltimore, MD, Aug 30-Sept 1, 2016
7th International Conference on Integration of Renewable
and Distributed Energy Resources (IRED), Niagara Falls
Canada, October 24-27, 2016
5th PV System Symposium, Santa Clara, CA, May 2017

11. 11
© 2016 Electric Power Research Institute, Inc. All rights reserved.
Solar Potential by country assuming residential PV Costs
Source: Bloomberg New Energy Finance
2014 2025