S U B S T A T I O N S

Energy Storage System

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ENERGY STORAGE SYSTEM

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1kWh 1kWh 1kWh 1kWh

1kWh 1kWh 1kWh 1kWh

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1kWh 1kWh 1kWh 1kWh

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The purpose of the Energy Storage System (E.S.S.) is to collect and store energy generated during the braking sequence of a vehicle such as a train, metro, trolleybus or tram vehicle. This energy can be consumed by adjacent trains, or it can be stored in a double layer supercapacitor and re-injected to the network when required.

The energy is not only dissipated as heat but can be reused by other vehicles later.

The E.S.S. insures the holding of the traction voltage along the line.The E.S.S. does not require any connection to the public distribution network with its strict requirements.The E.S.S. in a grid has no troublesome effect on the existing line and traffic.

Basic block diagrams:

12 to 16 kWh:

6 to 8 kWh:

1 to 4 kWh:

Couplingcubicle

Convertercubicle

Storagecubicle

Description

Available configurations

Green energy forenvironmental care

Renewable energy= Savings

Public distribution grid

Energy Storage System

Accelerating train Accelerating trainBraking / regenerating train

Typical rectifiertraction substation

1kWh

3

Comparison of the same system without and with Energy Storage System:

Electrical protections:

• The dissipative safety function permits a rapid discharge of the supercapacitor bank.

• SEPCOS unit protects the whole circuit with protection functions.

• UR15 HSCB direct tripping (IDS).

• Output and input side of the converter are protected by fuses.

• Voltage applied to the supercaps is monitored in order to insure the best lifespan of the modules.

• Voltage presence is indicated by safety light indicators.

• 64 frame leakage relay.

• Ventilation is monitored by temperature sensors.

• Safety-surge arresters connected to the input of the E.S.S. circuit between positive and negative pole and between negative and earth.

• Emergency stop button.

• Semiconductor high speed fuses are installed to protect the IGBT DC/DC converter.

Mechanical protection:

• Trolley connectors have degree of protection IP65 when plugged in.

• Supercap trolley is touch protected without any access to power terminals.

• Access to high voltage compartments is limited with safety locking of the doors

• Access to low voltage compartments is fully allowed.

• The door of the cubicle cannot be closed unless the supercap trolley is securely locked in the cubicle.

Performances

Safety

4

ENERGY STORAGE SYSTEM

Human System interface:

1. Local

The local control-command is located on the coupling cubicle and it includes:

• Mode Pre-loading/System OFF/System ON selector

• Mode Reset/Local/Remote selector

• ON/OFF selector for the control of the disconnector

• Emergency stop push-button

• Test lamps push-button

• Lamps: (earth fault, lock-out, HSCB open/closed, disconnector open/closed, pre-load contactor open/in progress...)

• Voltmeters for line voltage and supercaps voltage

• Ammeters for converter input current and supercaps current

2. Remote

Remote Interface via internet connection is available for:

• Board visualisation of the system and its current performances

• Control-command of the system

• Setting of the system

• Diagnostic and life duration management of the supercaps

• Reconditioning process of the supercaps

3. System Settings available in SEPCOS

• Line side voltage thresholds for functioning mode selection

• Current limits for the different functioning modes

• Voltage limits for the different functioning modes

• Regulation: set-points, coefficients and timing

• Loading, regeneration and dissipative discharge maximum slopes

Integration in containerized solutions:

Options

Coupling cubicle door: local command

5

Coupling Cubicle:

High voltage compartment

Low voltage compartment

Rear High voltage compartment

Low voltage plate(free access)

Description of the 3 cubicles

Disconnector SWS(Sécheron)

Fuses

Circuit breakerUR15 (Sécheron)

Measurement

Contactor SEC(Sécheron)

SEPCOS (Sécheron)

64 frame leakage relay

Filtering air reactor(s)

EMC filters

Input/Outputconnecting plate

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ENERGY STORAGE SYSTEM

Storage cubicle with capacitors embedded on a trolley (1kWh):

Converter:

Syntheticfiber filters

Fans withvariable speed

Dissipative dischargeresistors

Fan withvariable speed

Coils (1 perIGBT branch)

Filter capacitors

CEM filters

DC/DC converter

Hall effect sensors

Powerconnection box

Powerconnectors

Supercap125V module(4 modules in

serial connection),2 parallel bridges

Auxiliary power supply and CAN communication

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Outline dimensions

Configuration (kWh) Length (mm) Height (mm) Depth (mm)

1 3 x 1200 = 3600

2400 1400

2 4 x 1200 = 4800

3 5 x 1200 = 6000

4 6 x 1200 = 7200

6 9 x 1200 = 10800

8 11 x 1200 = 13200

12 2 x 6 kWh configuration2400 1400

16 2 x 8 kWh configuration

X Y

255 (25)120012001200

1100

Auxiliary cables area FOOT PRINT A•A Ø 16 (4x per cubicle)

100 100 100 1001100 1100 1100 1100 5050

2200

1350

2525

600

2021200 1200

(6000) 1400

300

AA

STORAGECAPACITOR 1

STORAGECAPACITOR 2

STORAGECAPACITOR 3

CONVERTERCOUPLING

Sécheron SA Rue du Pré-Bouvier 251217 Meyrin - GenevaCH-Switzerland

Tel: +41 (0)22 739 41 11Fax: +41 (0)22 739 48 11substations@secheron.comwww.secheron.com

This document is not contractual and contains information corresponding to the level of technology at the date of printing. Sécheron reserves the right to modify and/or improve the product, whose characteristics are described in these documents, as required by new technology at any time. It is the purchaser’s responsibility to inform himself, no matter what the circumstances, of the product’s

maintenance conditions and requirements. Sécheron reserves all rights, especially those arising from our “General Delivery Conditions”.

Copyright© 2007 Sécheron SA

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64B

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