Master's thesis: Inverter-Driven Oscillations in the Nordic power system: existing and future challenges

The Opportunity:

At Hitachi Energy, our purpose is advancing a sustainable energy future for all. As a Master Thesis Worker, you will be part of the R&D organization working in collaboration with Hitachi Energy and RISE. The increasing penetration of inverter-based resources is transforming the dynamic behavior of power systems and creating new challenges related to stability and oscillatory phenomena. This thesis project focuses on investigating Inverter-Driven Interactions (IDIs) in the Nordic power system and developing mitigation strategies to improve system stability under future inverter-rich operating conditions.

Your Responsibilities:

• Evaluate the dynamic behavior of a state-of-the-art Nordic power system test model under various operating and control scenarios, particularly inverter-rich conditions.
• Identify and design appropriate disturbances for assessing system dynamic performance and stability.
• Investigate the characteristics and properties of Inverter-Driven Interactions (IDIs) under changing operating conditions.
• Perform sensitivity studies to identify key parameters contributing to unwanted oscillations and stability issues.
• Analyze the influence of different operating points, contingencies, and control settings on system behavior.
• Develop, implement, and validate inverter-based control mitigation strategies to reduce or eliminate oscillatory interactions.
• Demonstrate the effectiveness and robustness of the proposed control solutions across a variety of system conditions.
• Utilize PowerFactory and Python-based automation tools to conduct simulations, sensitivity analyses, and contingency studies.
• Deliver the developed model, scripts, and user documentation, and present the outcomes to RISE and Hitachi Energy R&D before finalizing the Master Thesis.
• Live Hitachi Energy's core values of safety and integrity by taking responsibility for your actions while caring for your colleagues and the business.

• You are currently pursuing an MSc degree at a university in Sweden in Electrical Engineering, Energy Systems, Power Systems, Control Engineering, or a related field.
• Knowledge of power system analysis and stability.
• Understanding dynamic systems and control engineering principles.
• Knowledge of power electronics and inverter-based generation technologies.
• Basic experience with power system modelling and simulation tools. Programming experience, preferably in Python.
• Experience with DIgSILENT PowerFactory or similar simulation software is considered advantageous.
• You have strong analytical and problem-solving abilities with a passion for power system research.
• Ability to work independently while collaborating effectively with supervisors and project stakeholders.
• Proficiency in English, both written and spoken.

• A 1 to 2-page CV clearly describing the candidate's qualifications relevant to the project.
• Full transcript of records from both BSc and MSc studies.
• All application documents must be submitted in English.