Behind the walls of ABB’s factory in Untersiggenthal, Switzerland, our engineers are developing, manufacturing and testing technology that helps generate energy for millions of people worldwide.

Find out how we’re innovating excitation systems to achieve greater reliability and efficiency in the latest episode of This is Engineering.

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Excitation systems: enabling efficient and reliable power generation

Excitation systems are a vital component for power plants, enabling generators to operate safely and efficiently while supporting power grid stability.

These systems manage the current running through the rotor windings of the generators that convert rotational motion into electricity, controlling the generator’s output voltage. This means operators can synchronize production across multiple generators and respond rapidly and safely to changes in energy demand.

This is even more  important  with the growing adoption of renewable energy sources. These can be more intermittent and variable, putting more stress on the power grid and testing its resilience. Excitation systems are key to delivering reliable power in a hybrid, distributed grid.

ABB’s excitation systems help to keep electricity flowing for millions of people and businesses around the world. Our customers in the power generation sector rely on this technology – so every device that leaves the factory must meet the highest standards of performance. 

As we discover in this episode, that’s exactly what our engineers in  Untersiggenthal, Switzerland, work to achieve.

Any power plant can be a tough environment for electronics – and even more so if exposed to extreme environmental conditions. So, our engineers replicate and exceed harsh environmental conditions such as temperature and humidity in testing. We also test our systems with a range of shock and vibration simulations aimed at replicating any potential conditions they will face in deployment, or in transit to their destination.

Testing excitation system hardware is just one part of the puzzle. As this technology becomes increasingly smart, it’s also crucial to test the brains of the systems: their software.

Our advanced lab laboratory infrastructure in Untersiggenthal enables simulation of the most extreme operational scenarios based on real-world data: making sure the software can handle anything it’s likely to face once the system is commissioned. And the testing systems enable rapid iteration and re-testing to support software innovation and updates.

This episode goes into the detail and engineering excellence making this a reality – watch to find out more.

Meet the engineers

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Hendrik Nicolaus

I’ve worked at ABB for 8 years, first as a project engineer for excitation systems. After a period leading the excitation and rectifier systems assembly team in  Untersiggenthal, in 2022 I moved back into research and development, leading the System and Hardware Solutions team in excitation R&D.

My team develops the PCBA control hardware and integrates it into the system – covering both electrical and mechanical innovation. In addition, I manage several projects to develop the next generation of hardware and software for excitation systems.

I enjoy working in R&D as it’s an opportunity to develop new technologies and solutions with pace and efficiency: not just talking about problems, but finding real solutions.

As both team leader and project manager, I take pride in delivering positive outcomes, whether helping my team to grow and develop, or driving a project forward to achieve a successful solution.

Outside work I have two children, a little girl who’s 3 ½ and a very new baby son – just a few weeks old! I’m originally from Germany but now a Swiss citizen, having lived here for 12 years.

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Thomas Schaeuble

I’ve been with ABB at Untersiggenthal for 13 years as a hardware development engineer. Following experience with different applications like medium voltage drives, traction, and synchronization systems, I’ve been working on excitation systems for 6 years now. 

I first started experimenting with electronics as a hobby when I was a child. It fascinates me that you can build anything and solve any problem with electronics – especially nowadays in combination with software.

I’m responsible for the hardware laboratory for Excitation R&D and the Electromagnetic Compatibility (EMC) lab in Untersiggenthal. EMC testing is very important for our electronics. 

 For example, testing a single product can take several weeks in the lab, to make sure it meets or exceeds the rigorous industrial standards for global markets. It’s extremely satisfying when a product passes all the tests – it shows the hard work over many years has paid off, and the experience of the whole team has created a robust piece of hardware.   

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Ralf Bachmann-Schiavo

I've been with ABB excitation systems for around 10 years, working as a research and development engineer within the software development team.

I was attracted to engineering because I find it awesome that we have the capacity to transform the world around us. A big inspiration for me as a kid was the book “The Mysterious Island”, from Jules Verne. In this story, the main characters did just that on the Island they landed on, using knowledge of chemistry and basic engineering concepts.

More specifically, in electric engineering (power engineering in particular), I am drawn by the fact that power electronics can make many applications smarter, more flexible, and more efficient; it is comparable to giving a brain to electrical machines or power systems. 

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