Eco-friendly and long-lasting –
Leitzach power plant is fit for the future
Electrical Solutions Reference
Instrumentation, Controls & Electrical
SPPA-E3000 Electrical Balance of Plant
was the basis for a fast upgrade of the entire
unit auxiliary supply in the Leitzach pumped
storage power plant and ensures availability in
seconds, even in the event of a power outage.
The Result
■ Guaranteed availability
based on long-life
products and an optimum
plant-specific concept
■ Smooth operation thanks
to perfectly matched
electrical and control
equipment
The Plant
The Leitzach pumped storage power plant is
located about 40 kilometers southeast of
Munich in the foothills of the Alps. It is
equipped with three turbo-generator sets and
generates a total output of approximately
90 MW. It has been in operation for the Munich
Municipal Authorities since 1913 and is fed
by the Leitzach, Mangfall and Schlierach Rivers,
with nearby Seehamer Lake serving as an
up-stream storage reservoir. It takes just
90 seconds for the power plant to reach total
capacity, thus ensuring a flexible, reliable and
eco-friendly power supply for the Munich area.
The Task
With a basic structure that was almost 100
years old and power generating units dating
back to the 1960s and 1983, the technical
equipment of the pumped storage power plant
was in need of complete modernization. The
specific challenge in this case was to coordinate
operations so that part of the plant remained
continuously available to ensure constant regulation of the water level in Seehamer Lake.
Our Solution
The project called for renovation of the excitation machines and the start-up converters,
as well as modernization of the 10 kV machine
switchgear in Unit I including induction
frequency converter for the pump turbine and
the 5 kV machine switchgear in Unit II.
The SPPA-E3000 customized package of solutions also permitted the specific modernization of the unit auxiliary supply.
The low voltage switchgear in Units II and III
was replaced, the sub-distribution boards re-
moved and the consumers incorporated directly
into the new low voltage switchgear. The entire
DC voltage systems were also replaced in all
three units. The unit protection, synchronizing
equipment and unit auxiliary supply protection
system were replaced in all machines.
In addition to the electrical equipment upgrade,
the plant’s control system was also replaced.
SPPA-T3000 was applied according to
IEC 61850 for direct integration of the unit
auxiliary supply. As a result of this modernization, the power plant has been included in
the unattended operating mode used by the
Munich Municipal Authorities and now also has
remote black-start capability. SPPA-E3000 and
SPPA-T3000 therefore ensure eco-friendly and
cost-efficient operation day after day.
"Our experience with Siemens
products and systems and our
years of successful collaboration in the realization of major
projects gave us the assurance,
even at the start of the project,
that the system solutions from
Siemens would enable us to
ensure environmentallyfriendly power generation in
Leitzach in future as well."
Reinhard Nordhausen
SWM Services GmbH, S-KE
Answers for energy.
Published by and copyright © 2012:
Siemens AG, Energy Sector
Freyeslebenstrasse 1
91058 Erlangen, Germany
For more information contact
sppa-e3000.energy@siemens.com
www.siemens.com/energy/sppa-e3000
Siemens AG
Fossil Power Generation
Instrumentation, Controls & Electrical
Siemensallee 84
76187 Karlsruhe, Germany
E303_FR_Leitzach-eBoP_e _V2-0
Order no. E50001-G230-A307-X-4A00
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Subject to change without prior notice.
The information in this document contains
general descriptions of the technical options
available, which may not apply in all cases.
The required technical options should therefore
be specified in the contract.