Isolated Micro-grids and Electromagnetic Compatibility: Analysis, Mitigation Techniques, and Measurements of Rapid Load Changes
Alex Matthee is a PhD student in the Department Power Electronics. (Co)Promotors are prof.dr.ir. F.B.J. Leferink and dr.ir. D.J.G. Moonen from the Faculty of Electrical Engineering, Mathematics and Computer Science and prof.dr.ir. R. Smolenski from the University of Zielona Gora, Poland.
This thesis focuses on investigating the Electromagnetic Compatibility (EMC) challenges in isolated micro-grids, specifically analyzing the impact of rapid load changes on the reliability of power supplies. The research approach consisted of three key steps: developing a measurement system, conducting measurements on real-world diesel generators and inverters, and proposing a solution to mitigate the identified issues.
The first step involved the development of a sophisticated measurement system capable of capturing high-bandwidth data to comprehensively understand the extent of the EMC problem. This system facilitated the gathering of a comprehensive dataset, enabling detailed analysis of the challenges associated with rapid load changes in complex micro-grids.
Using the measurement system, measurements were performed on real-world diesel generators and inverters as well as lab-based grid emulations and software models, providing insights into the nature and causes of the EMC issues in isolated systems. The research discovered that isolated micro-grids lacked the necessary inertia to effectively handle rapid load changes, leading to reliability concerns. Building upon the findings from the measurements, a solution was proposed to address the identified problems. The solution involved the design and construction of a high-speed FPGA-controlled H-bridge inverter or AEF. These advanced control technologies aimed to compensate for the rapid rise in power caused by load fluctuations, thereby mitigating the adverse effects on the power supply’s reliability in isolated micro-grids. This thesis presents a comprehensive approach to understanding and addressing the EMC challenges arising from rapid load changes in isolated micro-grids.
By developing a measurement system, conducting real-world measurements, and proposing an innovative solution, this research provides valuable insights and recommendations for improving the reliability and electromagnetic compatibility of power supplies in isolated micro-grids. The findings contribute to the advancement of knowledge in the field and offer practical guidance for enhancing the performance of isolated micro-grids in various applications.
