Siemens has received an order from the energy provider SWW Wunsiedel
GmbH to supply and install a battery storage system. The Siestorage
system is based on lithium-ion batteries and has a capacity of more than
6 megawatts. The storage system, which will be connected to the
distribution grid, will enable the company to participate in the primary
control reserve market. "Energy stores, such as our Siestorage model,
are an important building block of the energy transition," says Dr.
Frank Büchner, who heads the Energy Management Division in Germany.
"Together with SWW Wunsiedel GmbH, we are helping to further stabilize
the grids in Germany." The energy provider and Siemens have agreed on a
ten-year financing model. Commissioning is scheduled for 2018.
The large storage system from Siemens consists of three containers with
lithium-ion cells, one container with the inverters, a concrete station
with the transformers and the control system. The power supplied by the
storage system will provide the higher-level transmission grid with
short-term support. Distributed power supply is increasing as part of
Germany’s transition to a new energy mix. Integrating more and more
renewable energy sources into the grids causes the volatility to
increase, the base load to decrease, the medium- and top-capacity demand
to grow and power surpluses to occur with increasing frequently. The
grid operators need reserve power to establish a balance between
generation and consumption at all times. The function of the primary
control reserve is to immediately balance out unforeseen fluctuations
and short-term load changes in the transmission grid. Energy
stores are generally better suited to this task since they can respond
in seconds, unlike the sluggish conventional power plants. All of the
offered power must be available within 30 seconds in order to maintain
the normal frequency of 50 Hertz and prevent a blackout. Transmission
grid operators purchase the primary control reserve they need on a
market basis with weekly invitations to bid.
"Installing the battery storage system is an important part of the
'WUNsiedler Weg – Energie' road map of SWW Wunsiedel GmbH", says Marco
Krasser, Managing Director of SWW Wunsiedel GmbH. With this road map,
the company has already built a number of innovative power generation
plants, thus proving that it is financially possible to cover energy
demand with purely renewable and locally available energy sources. In
the next step. the region is to be developed as part of Vision 2030 into
a service area that can operate in isolation and thus autonomously in
an emergency.
For further information on Division Energy Management, please see www.siemens.com/energy-
For further information on Siestorage, please see www.siemens.com/siestorage
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