Demystifying Grid Stability and Power-Electronic Systems
Making complex power systems topics accessible and engaging for engineers, investors, policy makers, and energy enthusiasts
Making complex power systems topics accessible and engaging for engineers, investors, policy makers, and energy enthusiasts
I am an expert in power systems dynamics, stability, and control, with a special emphasis on low inertia, inverter-dominated grids. I hold an M.Sc. in Electrical Engineering (2016) and earned my Ph.D. from the University of Liège (Belgium) in 2020, followed by a postdoctoral position at KU Leuven (Belgium).
My main focus areas are the study of weak grids with high penetration of converter-based generators. I work on very technical and complex challenges linked to the massive integration of power electronic converters in the power system, from static to dynamic analysis with ElectroMagnetic Transient (EMT) simulations.
Advanced control strategies for inverter-based resources in weak grid conditions
Operation and control of Multi-Terminal DC grids for efficient power transmission
Detailed electromagnetic transient analysis for power system dynamics
Stability analysis and control of grids with high renewable penetration
Expert consulting services for the energy transition
I provide advanced simulations and analysis of power system dynamics, including transient stability, small-signal stability, and frequency response. I help identify vulnerabilities and optimize system performance under normal and contingency conditions.
Why it matters:
As grids integrate more renewables and power-electronic assets, dynamic stability becomes critical to avoid blackouts and ensure reliable operation. TSOs, investors, and policymakers need accurate insights to make informed decisions on infrastructure and compliance.
Expert assessment and design of grid connection strategies for wind, solar, HVDC systems, batteries and data centres. I support compliance with grid codes, develop control strategies, and evaluate the impact of inverter-based resources on system stability.
Why it matters:
The energy transition hinges on seamless integration of renewables. Poorly managed connections can lead to instability and costly curtailments. My expertise ensures projects meet technical requirements and deliver maximum value.
Strategic consulting for investors and policymakers on stability-related risks in energy projects. I provide due diligence, regulatory compliance guidance, and risk mitigation strategies for large-scale renewable and transmission investments.
Why it matters:
Grid stability is not just a technical issue—it's a financial and regulatory one. Understanding stability risks early prevents costly delays and ensures projects align with evolving grid codes and market expectations.
I publish GridStab News, a Substack blog where I demystify power system dynamics and stability for a broad audience. My clear, no-equations approach has attracted over 2,000 subscribers who appreciate my ability to make complex grid challenges accessible and engaging.
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New Book
A Practitioner’s Guide — from the Nyquist criterion to passivity: the complete toolkit for converter-dominated grids
By Gilles Chaspierre
In 2015, engineers from the German transmission operator TenneT described a problem that was not supposed to exist. BorWin1 — the world’s first HVDC link to an offshore wind farm — had developed sustained oscillations at several hundred hertz. Every component worked exactly as designed, and the planning studies had shown nothing.
BorWin1 was not an isolated event. From a West Texas wind farm in 2009 to data centre loads in 2025, the same fingerprint keeps appearing — problems born not in any single device, but in the interaction between power-electronic converters and the grids they connect to. The classical stability toolkit, built over a century for synchronous machines, was never designed to see them. The toolkit that does see them is impedance-based stability analysis.
This guide compiles an eight-part GridStab News series into one consistent document: plain language, no equations, and every abstract idea anchored to a real, dated event before any machinery is introduced. Eight chapters, twenty figures, a glossary, and a referenced source list across 61 pages.
By Gilles Chaspierre
The electric grid is undergoing its most profound transformation in over a century. Solar farms, wind turbines, battery storage, and advanced power electronics are reshaping the way electricity is generated, transmitted, and consumed — and with them come new challenges that traditional engineering assumptions can no longer solve.
This book is about clarity, not complexity. It distils the essence of grid stability in the era of inverter dominance without drowning you in equations or jargon — helping grid operators, engineers, investors, and policymakers grasp what matters most for the future of power systems.
Paperback
Interested in working together? I'm available for consulting projects, advisory roles, and speaking engagements.
contact@gridstab.com