Power Quality of Energy Hubs-Modeling, Analysis, and Improvement

Project Details

Description

The Energy Hub is a highly self-sufficient microgrid dominated by power electronics devices and connected to a weak grid. High power demand and relatively low short circuit power result in extremely low Short Circuit Ratio (SCR) values, causing significant power quality issues. This project aims to develop new control strategies and converter modifications to ensure system stability in an Energy Hub with a low SCR grid connection.
The focus is on creating guidelines for the design and control of converters within the Energy Hub. This includes comparing different control strategies, tuning parameters, and modifying the control of grid-forming converters. In parallel, energy storage components are designed to provide sufficient inertia and energy, with appropriate ratings for both the storage systems and converters to support stable operation. The research also addresses fault diagnosis and clearance within the Energy Hub.
The project follows a comprehensive workflow involving design, modeling, simulation, and experimental verification. Depending on the research questions, different modeling approaches, such as RMS and EMT models, will be employed. Various Energy Hub configurations, including Heavy-Duty Electric Vehicle Charging Hubs and Photovoltaic Hydrogen Hubs, have already been modeled. New control strategies and modifications of grid-forming converters are elaborated on and verified. Cooperation work with the industrial field is conducted to validate the research.
The ultimate goal is to provide a valuable reference for Energy Hub designers, particularly from the perspective of converter design and control. The project aims to ensure stable Energy Hub operation under weak grid conditions with integrated renewables while minimizing installation costs and enhancing grid strength.

Funding

Funded by Shell
StatusActive
Effective start/end date1/06/2331/05/27

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