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Month: December 2025

Home / 2025 / December (Page 16)
December 11, 2025 BY
IN ABB

ABB UNITROL® 1000 Efficient product life cycle management

ABB provides several levels of service for:

• Single channel systems

• Dual channel systems

• Mounting on a plate or in a cubicle

Key benefits

Stable and reliable control of your machine

• Highly integrated and robust AVR for harsh industrial

environments. Stable and accurate regulation even with

highly disturbed voltages

• Fully configurable I/Os and measurement inputs and user

specific configurable fieldbus interface enable easy plant integration

Easy operation, monitoring and maintenance of the system

• Intuitive and user-friendly commissioning tool

Full support for grid codes

• Certified AVR according to German grid code including

verified simulation models, capable of analyzing dynamic

net faults (FRT)

• Built-in Power System Stabilizer (option), simulation models

and grid code studies available

Efficient product life cycle management

• Extended lifetime of your assets with minimum costs

Professional technical help always within your reach

• ABB has a service support network unmatched by the competition
December 11, 2025 BY
IN ABB

ABB provides several levels of service

Power system stabilizer (PSS)

PSS can be an option to provide standard IEEE 421.5-2005

2A / 2B / 2C function. The PSS provision is nowadays included

in most grid codes. The PSS is used for effective damping of

power oscillations caused by the physical power grid.

Software and tool for the UNITROL 1000 product portfolio:

All UNITROL 1000 products are based on the same target

software source code, therefore equal performance can be

seen with UNITROL 1010/20 as well as with UNITROL 1005.

The same simulation models can be used for the entire

UNITROL 1000 product family, making UNITROL 1000

products suitable for very demanding grid code applications.

ABB provides several levels of service for:

• Single channel systems

• Dual channel systems

• Mounting on a plate or in a cubicle
December 11, 2025 BY
IN ABB

ABB UNITROL® 1000 automatic voltage regulators Compact and powerful

UNITROL 1000 provides compact and

reliable solutions. Various built-in control

software functions, robust mechanical

and electrical design enable a wide range of applications.

Systems include protection breaker and exciter field breaker.

They are fully tested in the ABB factory and AVR setting can be ordered preset.

Main features

• Compact and robust AVR for excitation current up to 20 A

• Separate communication and control processors

• Wide range of built-in control software functions

• Ethernet-based fieldbus interface

• Wide range of power input voltage, for AC and DC input

• Flexible and freely configurable measurements and inputs/outputs (I/Os)

Efficient product life cycle management

• Extended lifetime of your assets with minimum costs

Professional technical help always within your reach

• ABB has a service support network unmatched by the competition
December 11, 2025 BY
IN ABB

ABB Small and medium Excitation and Automatic Voltage

Small and medium Excitation and Automatic Voltage

Regulation system (AVR)

The UNITROL® 6000 Medium excitation systems are engineered

to meet individual operational and environmental conditions as

well as international and local standards.

MEGADRIVE-LCI drives and static starters

For more than 35 years ABB’s MEGADRIVE-LCI drives and static

starters have proven their maximum reliability and availability in

a wide range of industries and applications. The MEGADRIVE

LCI is the preferred choice when it comes to reliable and

efficient operation of gas-fire power plants.

Flexible automatic synchronizers

For over 50 years, SYNCHROTACT® has protected power plant

generators and substations from the potentially destructive

effects of current surges caused by paralleling in non

synchronized conditions. SYNCHROTACT 6 is the sixth

generation of this well-proven and popular technology. Over

22.000 SYNCHROTACT units have been sold since its

introduction, more than any other synchronizer on the market.
December 11, 2025 BY
IN ABB

ABB UNITROL® 1000 Compact automatic voltage regulator systems

Around the generator solutions

The excitation system and synchronizer have a powerful impact on the

dynamic performance and the availability of the generator. They guarantee

the quality of the generator voltage and reactive power and therefore the

quality of the delivered energy from the power plant.

Compact automatic voltage regulator systems

The UNITROL® 1000 product family covers a wide range of

applications for voltage regulation tasks of a synchronous/

generator or motor up to 80 MVA. It sets a new benchmark

for the global industry with respect to functionality, reliability

and connectivity.

Small and medium Excitation and Automatic Voltage

Regulation system (AVR)

The UNITROL® 6000 Medium excitation systems are engineered

to meet individual operational and environmental conditions as

well as international and local standards.

MEGADRIVE-LCI drives and static starters

For more than 35 years ABB’s MEGADRIVE-LCI drives and static

starters have proven their maximum reliability and availability in

a wide range of industries and applications. The MEGADRIVE

LCI is the preferred choice when it comes to reliable and

efficient operation of gas-fire power plants.
December 11, 2025 BY
IN GE

GE PSPP Kaprun / Oberstufe Limberg I (Austria)

PSPP Kaprun / Oberstufe Limberg I (Austria)

The PSPP Kaprun Oberstufe was originally commissioned

1955-1956 with two horizontal machines sets consisting

of Francis turbine, motor-generator and a two-stage radial

pump. The overall installed power of this power plant was 112MW.

In 2018 the modernisation started. To increase the efficiency

and adapt on the new requirements of the energy market, the

Verbund decided to modernize the existing pumped storage

station Kaprun Oberstufe. In 2017 the tendering process for

both machine groups started. They shall be equipped as a

variable speed application with fully fed technology consists

of pump turbine, motor-generator as synchronous machine

and frequency converter. The converter is located between

synchronous machine and main step-up transformer and is

feeding the energy to the grid in turbine mode. Since mid of

2021 the first machine group is now producing energy and

one year later mid of 2022 the second machine group is

connected to grid as well.

Power Conversion’s scope includes:

• Four 6.6kV converters in sum 80MVA for the variable speed synchronous machines

• Main step-up transformers 110/6.4kV; 85MVA

• Control excitation equipment to start-up the machine and synchronize the units to the grid

• SEE units for the synchronous machines

• Overvoltage control protection

• Low voltage ride through (LVRT) ability according to Austrian grid code
December 11, 2025 BY
IN GE

GE Variable speed full size MM7

PSPP Linthal (Switzerland)

The PSPP Linthal was commissioned and handed over to

operator AXPO in 2016 and is producing energy since then.

The 1000MW PSPP is one of the most advanced

hydroelectric power plants in the world.

It is equipped with four rotating machines of 250MW each.

where the decision was taken to use the variable speed

technology to improve operation behaviors and increase the

advantages in regard of efficiency in full load and especially

the significant improvement in part load operation.

Power Conversion’s scope includes:

• Four 48/48MVA converters for the variable speed asynchronous machines

• Four excitation transformers 18/3.0kV; 28MVA

• Control excitation equipment to start-up the machine and synchronize the

units to the grid

• Overvoltage control protection (crowbar) for rotor of the machine

• Low voltage ride through (LVRT) ability according to Swiss grid code
December 11, 2025 BY
IN GE

GE Power Conversion’s references PSPP Goldisthal

Power Conversion’s references

PSPP Goldisthal (Germany)

The PSPP Goldisthal is located in Thüringen (in the east-

southern region of Germany) and has a capacity of 1060MW.

The project has begun in 1997 and produced energy since

2003. There are two variable speed machine sets with

AC-excitation and asynchronous machine and two fixed

speed machine sets with start-up frequency converter and

synchronous machines.

Goldisthal is one of the first pumped storage power plants

where the decision was taken to use the variable speed

technology to improve operation behaviors and increase the

advantages in regard of efficiency in full load and especially

the significant improvement in part load operation.

Power Conversion’s scope includes:

• Two 100MVA converters for the variable speed asynchronous machines

• Two SFCs with 18kV / 40MW for starting up all machines

• Two static excitation equipment (SEE) units for the synchronous machines
December 11, 2025 BY
IN GE

GE Synchronous condenser – frequency converter

Our advantages

• Proven technology & decades of experiences in power

electronics

• Wide range of systems architecture tailored to projects

specifics

• Grid code compliance simulation / grid forming control

• Integrated solution with mechanical OEM

• Numerous references of large pump storage system,

including largest projects in Europe

• Centralized expert team in Germany (Center of Excellence)

• Global partner with strong regional presence

• Strong presence in North America (local facility with

manufacturing, engineering and service)

Multiple reasons for investing in PSPP

When investing in a pumped storage power plant, decision

makers identify and define the main requirements the plant

has to fulfill. Reasons may vary, for example with the main

drivers being to produce power from water as a renewable

energy source, to balance the grid or to build a large-scale

energy storage system to help manage the power grid

and security of supply. Investors and decision-makers need

to identify the best technology suitable to meet the project’s

specific purpose.
December 11, 2025 BY
IN GE

GE Power Conversion’s technology for variable PSPP applications

Power Conversion’s technology for

variable PSPP applications

The heart of Power Conversion’s converter systems

are press-pack IGBTs.

Power Conversion uses rugged, robust press-pack IGBT

technology, which is superior to standard grade IGBT

technology. Press-pack IGBT yields better surge current

rating, improved thermal cycling and longest lifetime.

Press pack IGBTs do not use failure prone bond wires.

Power Conversion’s control technology supports different

algorithms for line side control, as well as various operation

modes that are required by grid operators around the world.

If required, Power Conversion offers support for grid

approvals with HIL simulators.

Needed space inside the power plant is strictly

connected to the specific requirements on our equipment and

design of the machine set. Power Conversion is investigating

and checking all relevant data to provide the best solution to fit

in the appropriate rooms for green field and brown field projects.

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