Hugo Pfister
Manager Systems & Markets
Arnhem, The Netherlands
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Hugo Pfister is a people and technology leader at TenneT Netherlands, focused on simplifying complexity in mission-critical systems and enabling effective, scalable, and innovative ways of working. He is an active advocate of open source, driving its adoption within TenneT and across international TSO collaboration.
Area of Expertise
Topics
Scaling Grid Security with Open Source
The power grid is changing fast, and the systems behind it are under pressure. More data, tighter timeframes, increasing congestion, and regulatory requirements are pushing traditional grid security tools beyond their limits. At TenneT Netherlands, legacy tooling was simply no longer fast and adaptable enough to keep up with this new reality.
By combining the open source PowSyBl framework with a cloud-native orchestration platform (ReFlow), TenneT rebuilt its grid security analysis from the ground up. The result is a step change in performance and capability: reducing calculation runtimes from minutes to seconds and enabling a fundamentally different way of working.
This session will show how we:
- Moved from monolithic legacy tooling to a modular, scalable architecture
- Used open source to accelerate delivery and avoid vendor lock-in
- Established what it takes to run open source in a mission-critical environment
- Strengthened operator support by providing an integrated view across analyses through modular design
Building OSPOs in Practice: Early Lessons from Cresym, 50Hertz / Elia and TenneT
As the energy sector undergoes rapid digital transformation, Open Source Program Offices (OSPOs) are emerging as strategic enablers within grid operators. Building open source readiness requires more than just technical adoption. It demands cultural and operational transformation. From aligning legal, finance, and executive leadership to equipping engineering teams with the right tools and practices, OSPOs play a critical role in guiding this shift.
This panel brings together OSPO leaders from Cresym, 50Hertz / Elia, and TenneT to explore how open source is reshaping collaboration, innovation, and the digital landscape in the utility sector. As several of these OSPOs are relatively new, the discussion will offer fresh perspectives on the challenges and opportunities of establishing and scaling such capabilities. Panelists will share firsthand experiences in launching and growing OSPOs, navigating internal alignment, and fostering cross-organizational collaboration.
Moderator:
Jonas van den Bogaard, Alliander - confirmed
Speakers:
Geethu Joseph, Cresym
Sven Fritzsche, Elia / 50Hertz
Hugo Pfister, TenneT
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