DC RSB – efficiency with DC technologyIntegration in industry, renewable energies, and infrastructure

DC RSB

• Combination of different storage systems and sinks

• Optimized energy transfer via the DC link system• Bidirectional energy management between

sources and sinks• Scalable for different functions• Solution based on industry-proven standard

products

Flexible integration and many different combination options

DC Renewable Storage Backbone

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References

Project charge@work Fraunhofer IAO StuttgartProject partnerFraunhofer IAO

System configuration10-kW small wind turbine (in preparation) 30-kW photovoltaic system 100-kWh lithium-ion storage system 30-kW electrolyzer (in planning stage) 30-kW fuel cell e-charging stations, 340-kW overall output

SINAMICS S120 Active Line Module SINAMICS S120 Motor Module SINAMICS DCP Local grid controller

Project descriptioncharge@work is investigating the interaction between many different kinds of smart grid participants. In the project, energy inputs from sun and fuel cells are coupled with loads like charging stations for electric vehicles.

HighlightsBlack-start capability of the system, separate network operation, compensation of the intermediate circuit in the milliseconds range

Project scopeDelivery of the power inverters and switchgear cabinets Start-up of the power and control electronics Provision of the DC link system control

Project run time Three years

Project BESS Karlsruher Institut für Technologie (Karlsruhe Institute of Technology) KarlsruheProject partnerKarlsruher Institut für Technologie (KIT) AccuSol

System configuration36-kWp photovoltaic system 50-kWh lithium-ion storage system

SINAMICS S120 active line module 250 kW SINAMICS DCP 30 kW SIMATIC S7 1500 SIMATIC iPC

Project descriptionDC coupling of photovoltaics and Li-ion storage system. Energy balancing occurs primarily on the direct-current side. A specific request can be issued to the nano grid via an energy management system. Top priority is given to increasing battery life through decoupling of the battery via SINAMICS DCP.

HighlightsPrototype for DC RSB and development platform for SINAMICS DCP of the first generation

Project scopeDelivery of the power inverters and switchgear cabinets Start-up of the power and control electronics

Project run timeTwo years

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Project Bohemia Rhapsody ZEBOTEC GmbH, Konstanz/PragueProject partnerZebotec GmbH Werft Bolle Prague Boats

System configuration50-kWh lithium-ion storage system Diesel generator 80-kW bow thruster

SINAMICS S120 basic line module 50 kW (limited) SINAMICS DCP 30kW SENTRON switching technology

Project description The “Bohemia Rhapsody” tourist boat operator wanted a redundancy solution designed. The requirement was for a method of supplying the bow thruster with electricity for 30 minutes in the event of failure of the diesel generator. The scope of the solution was enlarged, and the battery was also used for capping the peak load. This means that the bow thruster draws a maximum of only 50 kW from the diesel generator. The additional 30 kW are covered by the battery. In emergency operation, the battery switches over directly to the bow thruster and provides the entire 80-kW power output.

Highlights Redundancy operation for emergency requirement Switchover during ongoing operation Off-shore application Time-critical delivery schedule

Project scopeDelivery of the power and switchgear electronics Start-up of the power and control electronics

Project run timeThree months from award of order to acceptance

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DC RSB – the innovative solution for industry and the smart grid

DC RSB – Renewable Storage Backbone

The DC Renewable Storage Backbone (DC RSB) is an inno-vative solution suitable for industrial applications as well as multi-generator applications in the renewable energy sector. DC RSB provides the link that enables the intelli-gent combination of energy inputs, consumers, and stor-age technologies.

The DC RSB system consists of a combination of reliable and proven standard industrial components that bring together the energy flows of the connected systems via a DC intermediate circuit. Internal protection and control mechanisms keep the system in operation.

The system is flexibly assembled and controlled depend- ing on the operator’s requirements. Priorities can be matched in real time during operation. This means that DC RSB can implement a variety of different operating modes, including reducing peak load or increasing on-site consumption.

Advantages

• Efficient utilization of renewable forms of energy• Covers load and production peaks• Higher grid stability thanks to grid support• High degree of flexibility in the use of energy sources in

the grid

System components

The DC components in the DC RSB systems are linked to the voltage intermediate circuit via the DC/DC converter. The direct current system offers advantages with the sin- gle point of AC-Connection: Different system participants with different attributes interact and are equalized directly on the DC side. That improves the network couplings on the alternating-current side.

A real time-capable local grid controller (LGC) performs the open- and closed-loop control functions in the DC RSB system. The LGC is based on the proven SIMATIC S7-1500 automation system, which is designed specifically for inno- vative system solutions.

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Subject to change without prior notice Article No.: VRGS-B10003-00-7600 Dispo XXXXX WS 0316X.X Printed in Germany © Siemens AG 2016

Subject to changes and errors. The information given in this document only contains general descriptions and/or performance features which may not always specifically reflect those described, or which may undergo modification in the course of further development of the products. The requested performance features are binding only when they are expressly agreed upon in the concluded contract.

Siemens AG Process Industries and Drives Division Process Automation and Engineering Vertical Glass & Solar Siemensallee 84 76187 Karlsruhe Germany

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