New challenges for power grids
Wind and solar power have already become key power sources in today’s energy mix. Their heavy penetration and the growth of distributed generation have changed the structure of the power grid. Further, the unpredictable renewable generation capacity leads to fluctuations and imbalances between generation and load, influencing grid stability and power quality.
SIESTORAGE provides the solution
This modular electrical energy storage system from Siemens secures a continuous and reliable power supply. It integrates renewables and optimizes the usage of fossil generation to a modern eco-friendly grid.
SIESTORAGE combines cutting-edge power electronics for grid applications and high-performance Li-ion batteries. The design of SIESTORAGE can be adapted to specific demands, and enables a large field of applications for utilities, industries, cities and infrastructure.

Offset-diesel generation
Microgrids
T & D expansion deferral
Critical power
Integration of renewables
Frequency regulation Peak load management
Power quality
SIESTORAGE applications at a glance
 compensates performance fluctuation, improving system stability
Stores energy during low consumption periods and discharges it during peak hours to avoid exceeding maximum contractual demand with automatic load shedding
Regulates voltage by active and reactive power compensation

Avoids short power outages and reduces the need for backup power, ensures secure power supply for critical applications

Short term compensation of frequency fluctuation, improves system stability
Grid relief and extension of overloaded transmission lines to avoid immediate network extension projects

Power quality, system reliability and black start capability
Reduces diesel usage and CO
2
emissions
Your benefits with SIESTORAGE
The Siemens SIESTORAGE electrical storage system is ideally suited to various applications. It also provides a number of advantages, such as:
High availability and reliability
SIESTORAGE provides up to 95 percent availability during maintenance of one battery cabinet for a standard container thanks to independent battery strings. And there is no synchronization necessary because of the parallel connection on ac-side.
The black start capability of SIESTORAGE enables inde pendent micro grids. It can restore the power in case of an outage within a few milliseconds (hot standby) or a few seconds
(cold standby).
SIESTORAGE provides a reliable quality power supply and quick response in milliseconds with its cutting-edge power electronics.
Efficiency
SIESTORAGE offers saving potential up to 30 percent – with asset optimization. This depends on the application, which therefore has to be accurately assessed as the first step.
Eco-friendly
The black start capability enables the start up of a grid after an outage, independently from diesel generators.
SIESTORAGE ensures also the optimization of the diesel generation and the integration of renewables, thus reducing pollutant emissions.
Safety
SIESTORAGE provides a high degree of safety for personal and system operation. The dc power is limited and restricted to the smallest configurations in the complete system with individual battery modules. Safety is also provided through the use of qualified and proven battery technology.

Grid
Medium-voltage switchgear
Smart network control
System control Transformer
Filter
~
=
AC / DC inverter n cells in series *
Li-ion battery system
* number of cells varies according to application
Inverter control
Data logging
Battery management
1
5
2
4
3
1 System control 3 Battery management 5 Power stack
2 Inverter control 4 Battery rack
Modular system: Various configurations and storage sizes possible
A B
C
D
Nominal capacity *
20 kWh to 50 kWh
Power capability
Depending on capacity of the battery
Rated power (inverter)
120 kVA for one power stack (PS)
B A D D C D D
A B C D D
A Network connection cabinet
* Depending on the battery supplier
** Design depending on battery supplier
B Control cabinet C Power stack cabinet D Battery cabinet **
Nominal capacity *
Up to 1 MWh in one standard container
Rated power
1-3 MVA
Global competence along the whole supply chain
We offer the entire range of power distribution products, systems and solutions from a single source, thereby ensuring grid integration.
Due to our comprehensive technology competence and global presence we are close to our customers – with innovative products meeting the highest standards.
Engineering network design
Project management
Integration
Installation and commissioning
After-sales services

The information provided in this document contains merely general descriptions or characteristics of performance which in case of actual use do not always apply as described or which may change as a result of further development of the products. An obligation to provide the respective characteristics shall only exist if expressly agreed in the terms of contract.
All product designations may be trademarks or product names of Siemens AG or supplier companies whose use by third parties for their own purposes could violate the rights of the owners.
Siemens Industry, Inc.
7000 Siemens Road
Wendell, NC 27591
Subject to change without prior notice.
Order No.: IC1000-F320-A151-X-4A00
All rights reserved.
© 2013 Siemens Industry, Inc.
For more information, contact: 1-800-347-6659 www.usa.siemens.com