ABB Poland 2015 Maciej Kordas – Rail Conference Siofok 2015
ENVILINE EMS
Energy Management System
for Braking Train Energy Recovery
© ABB Group
November 20, 2015 | Slide 1
The braking energy opportunity
ENVILINE recovers the braking energy
Traction
Power
Braking
Acceleration
Constant
speed
Coasting
Back to AC
© ABB Group
November 20, 2015 | Slide 4
Station Acceleration
stop
Constant
speed
Coasting
Only a few kilowatt hours,
each time, but thousands of
times every day
Recovery of the Surplus Braking Energy
5-20% Energy Savings
Recoverable
excess braking
energy
System Receptivity,
high in peak, low in offpeak hours
~40-50%
Receptivity from onboard loads
ENVILINE ESS with super capacitors
Captures braking energy, sustains acceleration
MV/HV Network
AC ~
Legend
TDR energy rectification - acceleration
ESS energy storage - breaking
ESS
TDR
ESNA 2014,
Innovation Award
DC +
DC -
© ABB Group
November 20, 2015 | Slide 4
ENVILINE ESS
Energy Storage System
Operating voltage
range:
500 – 1000 VDC
1000 – 1850 VDC
Applications
Braking energy management
with no AC connection needed
Benefits
Reduces energy costs
Improves quality of DC power network
Provides quick payback
End customers
Transit authorities, DC traction system
owners / operators
Integrators, engineering companies
© ABB Group
November 20, 2015 | Slide 5
Starting Power and Demand Charge
A major cost item for Transit Authorities
43% of
the cost

Car analogy

Odometer indicates the amount of energy, or “Energy Consumption”,

Speedometer indicates the power level, or “Demand Charge”,

Utility customers pay for consumption (“mileage”), but also
significantly for demand (“maximum speed”)
Beyond the Utility Metered Demand Charge
Power peaks well beyond the measured demand
Daily consumption profile
2 500
15
1 500
10
1 000
5
500
0
1
3
5
7
9
11
13
15
17
19
21
23
Trains per hour
kWh / hr
2 000
Actual Demand
6000
20
4000
2000
0
0
7:10
7:20
7:30
Today’s Demand Charge
“15-min average consumption”

2000

1000
0
7:10
7:20
7:30
Today’s demand charge is based on
the kWh consumption during a 15minute window
The real demand is much higher,
imposing a worse strain on the grid
than reflected by the rate
Energy & Demand Cost Evolution
Shift from energy toward power mitigation focus
Demand Charge ($ / year)
Energy cost ($ / year)
2010
2011
2012
2013
2010
2011
2012
Data is courtesy of Valley Metro in Phoenix
Average Demand Charge increased 19.5%
in California over last 3 years
© ABB Group
November 20, 2015 | Slide 8
2013
ENVILINE ESS recovers the braking energy
And reduces the starting power demand from the grid
5500
Train power
ESS reduces the
starting power draw
4500
Utility supply
Current (Amp)
3500
2500
ESS supply
1500
500
Time
-500
-1500
Braking Energy
recovered by ESS
0
10
20
30
(Seconds)
40
50
60
ENVILINE ESS - Off Grid Operation
#3 – Increases power capacity with no grid connection
Off-grid
SS1
SS3
Braking
energy
Trickle
charge
energy
Trickle charge

Braking charge
Trickle charge
Supplies the power without any grid connection
Charges during coasting and braking, idle time
 Possibility of complementary battery if energy requirements are high (ie peak
periods)

© ABB Inc.
November 20, 2015 | Slide 10
Metro Trains Melbourne - MTM
Westona Mid-Span Voltage Support
Configuration of ENVILINE
modules for a total capacity of
2.2 MW / 24 MJ with super
capacitors
Traction support and energy
recuperation
Cost of deployment at 40% of a
traditional substation solution,
with on-going energy savings
© ABB Group
November 20, 2015 | Slide 11
Substations
Area of voltage problem
ENVILINETM Energy Storage Webinar
Rail Industry challenges

Rail operators amongst the
largest electricity consumers


Extremely high and rising
peak power demand


© ABB
A substation consumes as
much as 500-750 homes
Higher starting power of new
trains
Sustainability and energy
efficiency improvement
targets
Courtesy of Metro Trains Melbourne
Orange = train capacity / Blue = power limitation
Warsaw Metro Line 2, Poland
Braking and Gravitational Energy Recovery

10 module ENVILINE configuration
with a total capacity of 3.3MW / 40 MJ
with super capacitors

Dimensioned to capture the braking
and gravitational energy of the trains

Weekly and weekend average
savings: 3MWh/day
Stadion
© ABB Group
November 20, 2015 | Slide 13
ENVILINE on the web www.abb.com/enviline
www.abb.com/enviline
www.abb.com/enviline
© ABB | BU Motors and Generators
November 20, 2015 | Slide 14
© ABB Group
November 20, 2015 | Slide 15