IEEE Electrification Magazine - September 2015 - 36

Emulated
Power Source

ac Bus

dc Bus
Inverter

Alternative Converter
Energy Source

Community EnergyStorage System

Efficient Buildings
and Monitoring
Systems

ac
dc
PEV Fueling Stations

Figure 6. Renewable generation and vehicle systems integration through a local grid. (Source: NREL.)

batteries and other energy-storage components. NREL tests
and evaluates the electrical and thermal performance of battery cells, modules, and packs, full energy-storage systems, and
the interaction of these systems with other vehicle components. For B2U, NREL's repurposing cost calculator is available
for free download, enabling users to explore the effects of different repurposing strategies and assumptions on economics.

Energy Management Storage Testing at the
National Wind Technology Center
NREL's National Wind Test Center (NWTC) site, located within
an area of more than 300 acres near Boulder, Colorado,
includes field-test sites, test laboratories, electronics and
instrumentation laboratories, industrial high-bay work areas,
and machine shops (Figure 7). Electrically, the NWTC is connected to the Xcel Energy power grid via a substation located
near Boulder. The 10-MW capacity of the 13.2-kV electrical

interconnection between the NWTC and substation will be
upgraded to 20 MW in the near future. The test site infrastructure has a new energy-storage testing facility that can
house various energy-storage technologies with up to 8 MW
of total rated power. This facility consists of an array of outdoor prewired concrete pads-wired to the NWTC's mediumvoltage collector system. Each pad can accommodate modular energy-storage systems rated for up to 4 MW of rated electrical power. Also, each pad is equipped with an automated
medium-voltage switchgear system that allows them to be
connected individually to the real grid, or to a simulated grid
using the NWTC's 7-MVA controllable grid interface (CGI),
which is a power electronic grid simulator that can create any
desired grid conditions on its 13.2-kV terminals.
The CGI is designed to test grid-integration aspects of
any renewable energy technology and energy storage as
well as combinations of technologies. In particular, the CGI

Gamesa
2 MW
Siemens
2.3 MW
PV Array
1.1 MW

2.5-MW Dynamometer
5-MW Dynamometer
8-MW Storage
Pads

Research Turbines
2 × 650 kW
Figure 7. An aerial view of the National Wind Technology Center. (Source: NREL.)

36

I E E E E l e c t r i f i cati o n M agaz ine / SEPTEMBER 2015

7-MVA CGI

Alstom 3 MW

GE 1.5 MW



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