IEEE Electrification Magazine - September 2014 - 48

dc Input

Intermediate
dc Link

Half-Bridge Converters

Output to
Batteries

Full-Bridge Converter

Figure 18. The battery charger circuit.

ug +

VR

-
uf

ig +
-
if

CR

PWM
kif
kuf

Figure 19. The current control system block diagram.

40,000

Electric Energy (kWh)

35,000
30,000
25,000
20,000
15,000
10,000
5,000
0

Electric Energy
Consumptioin

R. S. McGonigal. (2006, May 1). Dynamic
braking. Trains. [Online]. Available: http://
Cs + 1/R
R
trn.trains.com/en/Railroad%20Reference/
L
RCs + 1
LCs2 + s + 1
ABCs%20of%20Railroading/2006/05/
R
Dynamic%20braking.aspx
International Union of Railways.
(2012, Oct. 9). Regenerative braking in dc
systems. [Online]. Available: http://www.
railway-energy.org/static/Regenerative_
braking_in_DC_systems_103.php
K. Bullis. (2010, Sept. 10). Subway trains to generate power for
the grid: A battery will capture power from braking trains.
[Online]. Available: http://www.technologyreview.com/
news/420734/subway-trains-to-generate-power-for-the-grid/2010
(2007, July 2). Regenerative braking boost green credentials.
Railway Gazette. [Online]. Available: http://www.railwaygazette.
com/news/policy/single-view/view/regenerative-brakingboosts-green-credentials.html
M. Khodayar, L. Wu, and M. Shahidehpour, "Hourly coordination of electric vehicle operation and volatile wind power
generation in SCUC," IEEE Trans. Smart Grid, vol. 3, no. 3,
pp. 1271-1279, Sept. 2012.

Regenerative
Energy

Figure 20. Daily electric energy consumption and regenerative production.

electric energy is not readily accessible, are also discussed.
Furthermore, if the available regenerative energy is insufficient in such cases, the train-mounted batteries can also
be charged by local distribution grids at municipal train
stations before shipped to remote locations.

For Further reading
J. Liu, S. Li, Y. Jiang, and M. Krishnamurthy, "Reliability evaluating for traction drive system of high-speed electrical multiple units," in Proc. IEEE Transportation Electrification Conf.,
pp. 1-6, 2013.

48

I E E E E l e c t r i f i c ati o n M agaz ine / september 2014

biographies
Yong Jiang (yjiang2@hawk.iit.edu) is with the Galvin Center for Electricity Innovation at the Illinois Institute of
Technology in Chicago.
Jianqiang Liu (liujianqiang@bjtu.edu.cn) is with Beijing
Jiaotong University in China.
Wei Tian (wtian3@hawk.iit.edu) is with the Galvin Center for Electricity Innovation at the Illinois Institute of
Technology in Chicago.
Mohammad Shahidehpour (ms@iit.edu) is with the
Galvin Center for Electricity Innovation at the Illinois
Institute of Technology in Chicago. He is also a research
professor at King Abdulaziz University in Saudi Arabia.
Mahesh Krishnamurthy (kmahesh@ece.iit.edu) is with
the Galvin Center for Electricity Innovation at the Illinois
Institute of Technology in Chicago.

http://http:// http://trn.trains.com/en/Railroad Reference/ http://www http://www.railway-energy.org/static/Regenerative_ http://www.technologyreview.com/ http://www.railwaygazette

Table of Contents for the Digital Edition of IEEE Electrification Magazine - September 2014