Blog 15: Paper presentation at PowerTech 2025
Hao, 22 August 2025
From June 29 to July 3, 2025, I attended the 18th IEEE PowerTech conference in Kiel, Germay, with another member of SPRINT Lab, Zehua Tang. I presented a research paper I led as first author, “Critical Short-Circuit Ratio Calculation for MIMO Systems Using Disk Margins”.
The technical program was diverse and engaging, featuring tutorials, keynotes, technical and poster sessions, as well as several special events. I attended multiple sessions that offered fresh perspectives on the ongoing transformation of power systems — from dynamics analysis of modern grids and the role of energy storage systems, to the latest GFM controllers and how they compare with classical GFL in different scenarios, which shape the focus of my future research.
SPRINT Team members attending the workshop - Left: Hao Zhou with the poster, Right: with Zehua Tang.
During the conference, I presented the paper in the Power Systems Dynamics session. This study shows how the disk margin, an effective multiloop analysis tool, can be used to assess stability and stability margins in multi-input multi-output (MIMO) models of converter-based power systems. These converters are used commonly for renewable energy generation, energy storage and EV charging. A large number of power converters requires accurate assessment of their impact on power system stability. Traditional methods to power stability can either be too complex or inadequate. This paper compared the proposed approach with traditional methods, highlighting its advantages. Additionally, the abstract margin values to the commonly used short-circuit ratio (SCR) metric to compute the critical SCR, effectively capturing system strength at the weakest frequency range. The paper is now available through King's College London University repository at this link.
Overall, attending PowerTech 2025 was a rewarding experience. It gave me the chance to share and discuss my work with peers, and gain valuable feedback. I look forward to applying the insights I gained to my ongoing research.
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Contact: hao dot zhou dot 1 at kcl dot ac dot uk