Pumped storage plant Goldisthal - VGB · PDF file1 | Pumped storage plant Goldisthal | J. Kahlert, U. Geiger | 22.09.2011 Pumped storage plant Goldisthal - from planning to today‘s

B03 Pumped storage plant Goldisthal - from planning to todays operation

1 | Pumped storage plant Goldisthal | J. Kahlert, U. Geiger | 22.09.2011

Pumped storage plant Goldisthal -

from planning to todays operation

Joachim Kahlert, Head of Technical Power Plant Management

Ulrich Geiger, Head of Operation Hydropower Plant

Vattenfall Europe Generation AG

VGB Conference Power Plants 2011

September 22th 2011 - Bern Confidentiality - None (C1)

Confidentiality - None (C1)


Contents

1 Basic data of the pumped storage plant

2 Planning, approval, construction and commissioning

3 Dispatch strategies

4 Continuous operation, operational experience and efficiency

5 Summary



Contents





5 Summary



Locations of Power Plants in Germany

The PSP Goldisthal is located

in the Free State of Thuringia,

approx. 70 km in the south of

the federal state capital Erfurt,

at the course of the river

Schwarza in the west of the

Thuringian Slate Mountains.

Pumped storage plant Goldisthal



Data of the water reservoirs

Upper reservoir

Lower reservoir

Dam height: 9 to 40 m

Wall length: 3,370 m

Altitude upper operation

reservoir: 874.0 m

Lower operation reservoir: 849.3 m

Usable water volume: 12.04 mill. m

Dam height: 67 m

Wall length: 220 m

Altitude upper operation

reservoir: 569.0 mill.

Altitude lower operation

reservoir: 549.0 mill.

Reservoir (incl. flood protection): 18.9 mill. m



Technical parameters

Installed capacity

1,060 MW with 4 pump turbines

265 MW, thereof:

- 2 pump storage units with

asynchronic-motor-generators

- 2 pump storage units with

synchronic-motor-generators

divided into two half plants.

1 run-of-river machine 670 kW

Construction time

from 1997 to 2004

Commisioning

from 2003 to 2004

View into the machine cavern house



Contents





5 Summary



Start of first investigations

In 1965 started investigations for a 3,000 MW power plant with one upper reservoir on both

sides of the Schwarza and one shaft power plant in the middle of the lower reservoir.

Basis for planning was the further expansion of nuclear power in the then DDR and the

therefore necessary supply of intermediate load and peak load.

In a study about possible locations for pump storage plants was in many steps with

deepened previous planning Goldisthal chosen as the best location of many possibilities.

Shaft power house variant approx. 1975



Changes of design parameters during DDR

Due to the estimated project costs, which would have

been very high, the project was rejected by the decision-

making body.

As a basis for planning was stipulated later, that the

planning of a power plant should be done analog to the

pump storage plant Markersbach.

As a new principle for planning was also estimated a

power plant, which belongs to the 1,000 MW class.

By the use of existing plans the project should have

been cheaper (e. g. only adaptations of the height of fall

and other technical and constructional parameters).

At the beginning of the 1980s planning and preparatory

work were stopped and the initiated buildings were

secured. Construction work was ceased for the time.

Geological investigations were continued.

Underground investigations



Resumption of the project

1988 Resolution for resumption of the construction preparation

1990 Constitution of a new construction staff

Investigations about execution, efficiency and capability of permission

1997 Decisions about continuing construction by the board of VEAG

Start of boring the tunnel and resumption of the construction

2001 Finish lower reservoir

2002 Finish upper reservoir

Excavation work machine cavern

Construction outlet structure



Approval process

Since the planning had started before 1989, respectively unification treaty, a lot of regulatory

decisions were still valid. Despite this, the approval procedure took several years:

1992 Initiation of the regional planning procedure

Begin of negotiations about real estates

Working out of the environmental compatibility study

1993 Finish of the regional planning procedure with a positive judgment of the states

regional development planning

Initiation of the plan approval procedure

1994 Public display of the documents

1995 Start of the EU-wide tendering procedure

1996 Plan approval resolution

Action of the federal states

1997 Amicable arrangement and withdrawal of the action

2004 Surrender of the operation approval

2010 Finish of the last compensation measures concerning plan approval procedure



Pictures from the construction phase 1/2

Assembly work in the machine cavern

Boring machine cavern

Main dam lower reservoir

during the construction

phase



Pictures from the construction phase 2/2

Filled auxiliary dam lower reservoir

Turbine with guide vanes and impeller wheel Construction upper reservoir

View over upper and lower reservoir



Commissioning

2003 was the commissioning of both synchronous

machines.

2004 was the commissioning of both

asynchronous machines.

The IBS-Phase provided confirmation, that there

were different efficiency characteristic lines as well

as different performance in the use of synchronous

and asynchronous machines.

Therefore arose questions concerning a sensible

use of the machines:

- Which Types?

- In which combination?

- At what time?

There were investigations of

- the economic ranges of application and

- the technical ranges of application.

Assembly impeller wheel



Implementation of findings from the commissioning

Part load operation:

Turbine operation:

Technical a turbine operation is possible

from 0 to 100 %, the economic

optimization provided the following

operation range:

Synchronous machines

100 MW to 265 MW

Asynchronous machines

40 MW to 265 MW

Pump operation:

Synchronous machines in pump

operation are not controllable

Asynchronous machines

-190 MW to -290 MW, this corresponds

to -100 MW control power per machine P

Asynchronous

machine

Synchronous

machine

Since 2004 has been done a permanent

optimization of application of the machines

1 to 4 at the PSP Goldisthal

With optimization tools machines can be

operated at any time und in every

combination, each with the highest

efficiency.



Contents




4 Continuous operati

Documents

Pumped storage plant Goldisthal - VGB · PDF file1 | Pumped storage plant Goldisthal | J. Kahlert, U. Geiger | 22.09.2011 Pumped storage plant Goldisthal - from planning to today‘s