Magnetic Field Energy Harvesting for Railway Systems
Doctoral thesis
Permanent lenke
https://hdl.handle.net/11250/3172697Utgivelsesdato
2025Metadata
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Sammendrag
Wireless sensors are typically powered by accumulators of limited capacity and are therefore naturally constrained in terms of energy usage. An increasingly common solution to prolong system lifetime and reduce the need for manual upkeep is to employ some form of energy harvesting, thus enabling the sensor to scavenge energy from its environment to replenish its energy reserves.
Magnetic field energy harvesting (MFEH) has emerged as an attractive approach for power grid systems, and entails scavenging energy through induction from an ambient alternating magnetic field. The presence of large currents in electrified railways leads to the generation of stray magnetic fields that may also be employed to this end. Due the non-invasive nature of MFEH, the approach has the potential to be widely deployed as part of low-cost railway condition and environmental monitoring systems to increase lifetime and reduce maintenance requirements.
This PhD project introduces MFEH for railway systems as a research space, featuring possibly the first published description of the concept. As part of an initial feasibility study, an accurate analytic model is formulated for the power output of a free-standing MFEH device and verified against simulation and laboratory measurements. The viability of MFEH for railway systems is then demonstrated by a first-generation prototype system placed in situ along Norwegian railway.
A model of the Norwegian railway electrification network is derived as a tool to select an optimal deployment location for an MFEH device. It is demonstrated how this model can be used to inform the decision of where to place a system by quantifying the potential for energy harvesting at a locations along the railway.
Based on lessons learned from the first prototype, a second-generation energy harvester is designed, simulated, constructed, and tested both in the lab and in the field. The second-generation device is deployed in the field for a considerable duration and shown to successfully power a small wireless sensor, thereby demonstrating energy-neutral operation of a typical application.
Består av
Paper 1: Espe, Asbjørn Engmark; Mathisen, Geir. Towards Magnetic Field Energy Harvesting near Electrified Railway Tracks. I: 2020 9th Mediterranean Conference on Embedded Computing (MECO). IEEE 2020 https://doi.org/10.1109/MECO49872.2020.9134113 and https://hdl.handle.net/11250/2677998Paper 2: Espe, Asbjørn Engmark; Haugan, Thomas Sagvold; Mathisen, Geir. Magnetic Field Energy Harvesting in Railway. IEEE transactions on power electronics 2022 ;Volum 37.(7) s. 8659-8668 https://doi.org/10.1109/TPEL.2022.3141437 and https://hdl.handle.net/11250/2992650
Paper 3: Espe, Asbjørn Engmark; Andersen, Sondre Ninive; Salvo Rossi, Pierluigi; Kræmer, Frank Alexander; Mathisen, Geir. An Analysis of Design Parameters for Energy Management of Wireless Sensor Devices. I: 2022 IEEE International Conference on Industrial Technology (ICIT). IEEE conference proceedings 2022 https://doi.org/10.1109/ICIT48603.2022.10002831
Paper 4: Andersen, Sondre Ninive; Espe, Asbjørn Engmark; Hendseth, Sverre; Mathisen, Geir. Formalising Nondeterministic Communication in Wireless Sensor Networks Using CSP. I: 2021 10th Mediterranean Conference on Embedded Computing (MECO). https://doi.org/10.1109/MECO52532.2021.9460193