IEEE Electrification Magazine - September 2015 - 37

Power Rating
* 7 MVA Continuous
* 39-MVA Short-Circuit Capacity (for 2 s)
Possible Test Articles
* Types 1, 2, 3, and 4 Wind Turbines
* Capable of Fault Testing of World's
Largest 6.15-MW Type-3 Wind Turbine
* PV Inverters, Energy-Storage Systems
* Conventional Generators
* Combinations of Technologies

CGI
dc

7 MVA

ac
dc

Grid
13.2 kV

13.2 kV

ac

ac

Test
Article

dc
ac

dc

dc

Voltage Control (No-Load THD < 5%)
* Balanced and Unbalanced Voltage Fault Conditions (ZVRT and
130% HVRT)-Independent Voltage Control in Each Phase
* Long-Term Symmetrical Voltage Variations (±10%) and
Voltage Magnitude Modulations (0-10 Hz)-SSR
* Programmable Impedance (Strong and Weak Grids)
* Programmable Distortions (Lower Harmonics 3, 5, 7)
Frequency Control
* Fast Output Frequency Control (±3 Hz)
* 50-/60-Hz Operation
* Simulate Frequency Response of Various Power Systems
* RTDS/HIL Capable
THD: Total Harmonic Distortion
ZVRT: Zero-Voltage Ride-Through
HVRT: High-Voltage Ride-Through
SSR: Solid-State Relay
RTDS: Real-Time Digital Simulation

ac

Capabilities
* Balanced and Unbalanced Over- and
Undervoltage Fault Ride-Through Tests
* Frequency Response Tests
* Continuous Operation Under Unbalanced
Voltage Conditions
* Grid Condition Simulation (Strong and Weak)
* Reactive Power, Power Factor, Voltage
Control Testing
* Protection System Testing (Over- and
Undervoltage and Frequency Limits)
* Islanding Operation
* Subsynchronous Resonance Conditions
* 50-Hz Tests

Figure 8. The main technical specifications of the CGI.

NWTC Wind Turbines
Alstom 3 MW
2.5-MW Dynamometer
Siemens 2.3 MW
5-MW
Dynamometer
GE 1.5 MW
Gamesa 2 MW
CART2 and CART3

10-MW Line Capacity
(Upgrade to 20 MW by 2018 with
New 115-kV Transmission Line,
NWTC On-Site Substation and
35.4-kV Collector System)

Xcel Bus
CGI Bus

Switchgear
Building

1-MW PV Array

13.8 kV
13.2 kV

8-MW Energy-Storage
Testing Facility

Load Bank for
Microgrid Testing

115 kV

Xcel
Substation
(Eldorado Canyon)

13.2 kV

Link with ESIF
High-Performance Computing,
Vizualization and HIL
Capabilities
CGI
ESIF
for Grid and Fault Simulation
(7 MVA Continuous/39 MVA Short Circuit)

Research Electrical
Distribution Bus
ac and dc
Figure 9. A conceptual diagram of the NWTC test site, which includes energy-storage testing facilities. (Source: NREL.)

IEEE Electrific ation Magazine / S EP T EM BE R 2 0 1 5

37



Table of Contents for the Digital Edition of IEEE Electrification Magazine - September 2015

IEEE Electrification Magazine - September 2015 - Cover1
IEEE Electrification Magazine - September 2015 - Cover2
IEEE Electrification Magazine - September 2015 - 1
IEEE Electrification Magazine - September 2015 - 2
IEEE Electrification Magazine - September 2015 - 3
IEEE Electrification Magazine - September 2015 - 4
IEEE Electrification Magazine - September 2015 - 5
IEEE Electrification Magazine - September 2015 - 6
IEEE Electrification Magazine - September 2015 - 7
IEEE Electrification Magazine - September 2015 - 8
IEEE Electrification Magazine - September 2015 - 9
IEEE Electrification Magazine - September 2015 - 10
IEEE Electrification Magazine - September 2015 - 11
IEEE Electrification Magazine - September 2015 - 12
IEEE Electrification Magazine - September 2015 - 13
IEEE Electrification Magazine - September 2015 - 14
IEEE Electrification Magazine - September 2015 - 15
IEEE Electrification Magazine - September 2015 - 16
IEEE Electrification Magazine - September 2015 - 17
IEEE Electrification Magazine - September 2015 - 18
IEEE Electrification Magazine - September 2015 - 19
IEEE Electrification Magazine - September 2015 - 20
IEEE Electrification Magazine - September 2015 - 21
IEEE Electrification Magazine - September 2015 - 22
IEEE Electrification Magazine - September 2015 - 23
IEEE Electrification Magazine - September 2015 - 24
IEEE Electrification Magazine - September 2015 - 25
IEEE Electrification Magazine - September 2015 - 26
IEEE Electrification Magazine - September 2015 - 27
IEEE Electrification Magazine - September 2015 - 28
IEEE Electrification Magazine - September 2015 - 29
IEEE Electrification Magazine - September 2015 - 30
IEEE Electrification Magazine - September 2015 - 31
IEEE Electrification Magazine - September 2015 - 32
IEEE Electrification Magazine - September 2015 - 33
IEEE Electrification Magazine - September 2015 - 34
IEEE Electrification Magazine - September 2015 - 35
IEEE Electrification Magazine - September 2015 - 36
IEEE Electrification Magazine - September 2015 - 37
IEEE Electrification Magazine - September 2015 - 38
IEEE Electrification Magazine - September 2015 - 39
IEEE Electrification Magazine - September 2015 - 40
IEEE Electrification Magazine - September 2015 - 41
IEEE Electrification Magazine - September 2015 - 42
IEEE Electrification Magazine - September 2015 - 43
IEEE Electrification Magazine - September 2015 - 44
IEEE Electrification Magazine - September 2015 - 45
IEEE Electrification Magazine - September 2015 - 46
IEEE Electrification Magazine - September 2015 - 47
IEEE Electrification Magazine - September 2015 - 48
IEEE Electrification Magazine - September 2015 - 49
IEEE Electrification Magazine - September 2015 - 50
IEEE Electrification Magazine - September 2015 - 51
IEEE Electrification Magazine - September 2015 - 52
IEEE Electrification Magazine - September 2015 - 53
IEEE Electrification Magazine - September 2015 - 54
IEEE Electrification Magazine - September 2015 - 55
IEEE Electrification Magazine - September 2015 - 56
IEEE Electrification Magazine - September 2015 - 57
IEEE Electrification Magazine - September 2015 - 58
IEEE Electrification Magazine - September 2015 - 59
IEEE Electrification Magazine - September 2015 - 60
IEEE Electrification Magazine - September 2015 - 61
IEEE Electrification Magazine - September 2015 - 62
IEEE Electrification Magazine - September 2015 - 63
IEEE Electrification Magazine - September 2015 - 64
IEEE Electrification Magazine - September 2015 - Cover3
IEEE Electrification Magazine - September 2015 - Cover4
http://www.nxtbook.com/nxtbooks/pes/electrification_december2019
http://www.nxtbook.com/nxtbooks/pes/electrification_september2019
http://www.nxtbook.com/nxtbooks/pes/electrification_june2019
http://www.nxtbook.com/nxtbooks/pes/electrification_march2019
http://www.nxtbook.com/nxtbooks/pes/electrification_december2018
http://www.nxtbook.com/nxtbooks/pes/electrification_september2018
http://www.nxtbook.com/nxtbooks/pes/electrification_june2018
http://www.nxtbook.com/nxtbooks/pes/electrification_december2017
http://www.nxtbook.com/nxtbooks/pes/electrification_september2017
http://www.nxtbook.com/nxtbooks/pes/electrification_march2018
http://www.nxtbook.com/nxtbooks/pes/electrification_june2017
http://www.nxtbook.com/nxtbooks/pes/electrification_march2017
http://www.nxtbook.com/nxtbooks/pes/electrification_june2016
http://www.nxtbook.com/nxtbooks/pes/electrification_december2016
http://www.nxtbook.com/nxtbooks/pes/electrification_september2016
http://www.nxtbook.com/nxtbooks/pes/electrification_december2015
http://www.nxtbook.com/nxtbooks/pes/electrification_march2016
http://www.nxtbook.com/nxtbooks/pes/electrification_march2015
http://www.nxtbook.com/nxtbooks/pes/electrification_june2015
http://www.nxtbook.com/nxtbooks/pes/electrification_september2015
http://www.nxtbook.com/nxtbooks/pes/electrification_march2014
http://www.nxtbook.com/nxtbooks/pes/electrification_june2014
http://www.nxtbook.com/nxtbooks/pes/electrification_september2014
http://www.nxtbook.com/nxtbooks/pes/electrification_december2014
http://www.nxtbook.com/nxtbooks/pes/electrification_december2013
http://www.nxtbook.com/nxtbooks/pes/electrification_september2013
http://www.nxtbookMEDIA.com