SUBSTATIONS. Energy Storage System

Transcription

1 SUBSTATIONS Energy Storage System

2 ENERGY STORAGE SYSTEM Description 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. Public distribution grid Typical rectifier traction substation Energy Storage System Green energy for environmental care Renewable energy = Savings Accelerating train Braking / regenerating train Accelerating train 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. Available configurations Basic block diagrams: 1 to 4 kwh: Coupling cubicle 6 to 8 kwh: Converter cubicle SYNC 12 to 16 kwh: Storage cubicle SYNC 1kWh SYNC 2

3 Performances Comparison of the same system without and with Energy Storage System: Safety 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. 3

4 ENERGY STORAGE SYSTEM Options 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 Coupling cubicle door: local command 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: 4

5 Description of the 3 cubicles Coupling Cubicle: High voltage compartment Disconnector SWS (Sécheron) Fuses Circuit breaker UR15 (Sécheron) Measurement Input/Output connecting plate Contactor SEC (Sécheron) Low voltage plate (free access) SEPCOS (Sécheron) EMC filters Rear High voltage compartment Filtering air reactor(s) Low voltage compartment 64 frame leakage relay 5

6 ENERGY STORAGE SYSTEM Storage cubicle with capacitors embedded on a trolley (1kWh): Power connection box Power connectors Auxiliary power supply and CAN communication Supercap 125V module (4 modules in serial connection), 2 parallel bridges Fans with variable speed Synthetic fiber filters Converter: Dissipative discharge resistors Fan with variable speed Filter capacitors DC/DC converter Hall effect sensors Coils (1 per IGBT branch) 6 CEM filters

7 Outline dimensions (6000) (25) COUPLING CONVERTER STORAGE CAPACITOR 1 STORAGE CAPACITOR 2 STORAGE CAPACITOR A A X Y Auxiliary cables area FOOT PRINT A A Ø 16 (4x per cubicle) Configuration (kwh) Length (mm) Height (mm) Depth (mm) 1 3 x 1200 = x 1200 = x 1200 = x 1200 = x 1200 = x 1200 = x 6 kwh configuration 16 2 x 8 kwh configuration

8 SG825864BEN_B Sécheron SA Rue du Pré-Bouvier Meyrin - Geneva CH-Switzerland Tel: +41 (0) Fax: +41 (0) substations@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