meeting utility step voltage change requirements by
TRANSCRIPT
Meeting Utility Step Voltage Change Requirements by Providing Precise Voltage Control for a PV Plant on a
Distribution Feeder
2014 IEEE PES Transmission & Distribution Conference & Exposition
Chicago, IL April 16, 2014 - 14TD0512
1
US Photovoltaic Solar Resources
2
Bagdad
Solar Plant
Area One-Line Diagram
3
Transmission System Serving Bagdad, Arizona
115 kV Bagdad
Copper
Mine
12.47 kV
Town of
Bagdad
Capacitor Banks
Bagdad
Substation
Radial 115 kV
Line Back to
APS Grid
Area One-Line Diagram
4
Addition of PV Solar Plant – 15 MW / 0 MVAR
Solar
Plant
15 MW
115 kV Bagdad
Copper
Mine
12.47 kV
Town of
Bagdad
Capacitor Banks
Bagdad
Substation
Radial 115 kV
Line Back to
APS Grid
Variations in Solar PV Plant Output
5
Actual Field Measurements - PV Solar Generation (MW)
Loadflow: The Voltage Problems
6
Voltage and Step Voltage Change vs. PV Generation
Voltage and
Current
Monitoring
Area One-Line Diagram
7
PV Solar Plant with the D-VAR® STATCOM Addition
2 MVA 4 MVA
CT
PT
D-VAR
System
Control
SGI
Smart Grid
Interface
PF Control
D-VAR
STATCOM
Line Flow –
Constant PF
2 MVAR
Reactor
Solar
Plant
15 MW
115 kV Bagdad
Copper
Mine
12.47 kV
Town of
Bagdad
Capacitor Banks
Bagdad
Substation
Radial 115 kV
Line Back to
APS Grid
Voltage and
Current
Monitoring
Area One-Line Diagram
8
PV Solar Plant with the D-VAR® STATCOM Addition
2 MVA 4 MVA
CT
PT
D-VAR
System
Control
SGI
Smart Grid
Interface
PF Control
D-VAR
STATCOM
Line Flow –
Constant PF
2 MVAR
Reactor
Solar
Plant
15 MW
115 kV Bagdad
Copper
Mine
12.47 kV
Town of
Bagdad
Capacitor Banks
Bagdad
Substation
Radial 115 kV
Line Back to
APS Grid
Area One-Line Diagram
9
PV Solar Plant with the D-VAR® STATCOM Addition
The STATCOM System Solution
10
D-VAR® MVAR Output and Feeder PF vs. PV Generation
Loadflow: The STATCOM System Solution
11
Voltage and Step Voltage Change vs. PV Generation
Stability: The Problem
12
Voltage and PV Generation vs. Time
Stability: The STATCOM System Solution
13
Voltage, PV Generation, and D-VAR® Output vs. Time
Variations in Solar PV Plant Output
14
Actual Field Measurements
Variations in Solar PV Plant Output
15
Actual Field Measurements
Satellite View – Google Maps
16
Mine Site Near Bagdad, Arizona
Town
Airport Bluff
& Solar
Farm Mine Tailings Pond
Satellite View – Google Maps
17
Bagdad PV Plant - Under Construction
• 135 acres, farm total
• 107 acres, PV arrays (behind the fence)
• Construction started Feb 2011
• Commercial Operation Date (COD): Dec 2011
Panoramic View
18
Bagdad PV Plant - Completed
Questions?
19
John A. Diaz de Leon II Senior Consulting Engineer
• 608-828-9179
• j
• w
www.amsc.com