Print Email Facebook Twitter Magnetic and Induced Electric Field Management for Underground cable Installation: Calculations, analysis and Design Optimization Title Magnetic and Induced Electric Field Management for Underground cable Installation: Calculations, analysis and Design Optimization Author Muralidhar, S.H. Contributor Rodrigo Mor, A. (mentor) Meijer, S. (mentor) Faculty Electrical Engineering, Mathematics and Computer Science Department Electrical Power Engineering Programme Master Date 2015-08-28 Abstract The international growing concern for the human exposure to magnetic fields generated by electric power lines has unavoidably led to imposing legal limits. The world health organization sets limits for exposure to magnetic and induced electric fields. Basically, the world health organization references to the guidelines provided by the International Commission on Non-Ionizing Radiation Protection (ICNIRP). For 50 Hz exposure, this guideline is 1000 ?T for occupational workers and 200 ?T for the general public. In several countries however, stricter limits are set, down to 0.3 ?T. However, it is stressed that the calculation methods and starting points also differ significantly and these values can therefore not be compared one-to-one. In this study the magnetic and induced electric fields of different cable installation methods like directly burial, underground tunnels were calculated and evaluated against the ICNIRP guidelines. Different operating conditions such as normal operation at 1450 A, emergency operation at 1760 A, 80 kA short circuit currents and operation during maintenance were assessed. Based on the study, it could be concluded that all situations were below the ICNIRP values for 50 Hz exposure, except for the short circuit conditions. However, these are only during a very short duration of maximal 1 second and their allowance needs to be discussed with the relevant authorities. Moreover, voltage might be induced in other metallic structures (due to magnetic induction) which might lead to unsafe situations, like where public or animals come in contact to energized metal object and experience shocks. The ultimate outcome of this thesis study is to answer the part of questions arising for health concern due to exposure of magnetic fields, as this study limits to underground installation (direct burial and tunnels). Subject Magnetic FieldsICNIRPSafety To reference this document use: http://resolver.tudelft.nl/uuid:bfe39799-8487-4be3-9642-2ee08de29c06 Embargo date 2019-07-27 Part of collection Student theses Document type master thesis Rights (c) 2015 Muralidhar, S.H. Files PDF TU_Delft_Shree_harsha_Mur ... Thesis.pdf 2.89 MB Close viewer /islandora/object/uuid:bfe39799-8487-4be3-9642-2ee08de29c06/datastream/OBJ/view