Based on theoretical consideration and some previous work by several researchers, the ESE is believed to be providing more effective protection against lightning than would a FR system. However, the scientific and technical basis to support the belief of this improved system is still not concrete enough and this then inevitably leads to the efficacy of these technologies still remain opened for further study and improvement. The new system is equipped with a special device that is used to extend the effective range of protection over that of the FR. In this work, results have been obtained from the simulated testing carried out in the laboratory and also from field monitoring of real FR and ESE system installed in the university campus. Visits to several sites, which employ these systems, have enabled physical observation of the after effects of lightning be recorded for analyses. The results show that slightly rounded air terminal, which is typical of ESE system offer better interception ability than that of sharp terminals, which is the typical FR design.
Design guidelines for lightning protection of PV systems
Lightning Ph.D. Dissertation Sample - Writing a Thesis about Lightning Thesis Hypothesis
Do a more advanced search ». Showing result 1 - 5 of 12 swedish dissertations containing the words lightning protection. Abstract : This thesis deals with the physical modeling of the initiation and propagation of upward positive leader discharges from grounded structures during lightning strikes. It includes the analysis of upward leaders initiated under the influence of the electric field produced by a dominant negative cloud charge and due to the combined action of a negative thundercloud and a descending downward stepped negative leader. Abstract : This thesis deals with the electromagnetic compatibility EMC problems of distributed electrical networks, especially that caused by lightning to electrified railway. Lightning transients were found to damage important devices that control train movements, causing traffic stoppage and delays.
Godson, Ikhazuangbe Ivbuobe Multibody dynamic analysis of lightning protection systems for modern wind turbines. PhD thesis, University of Nottingham. They are sometimes located offshore for better wind condition, bringing them closer to lightning, and the blade is mostly affected when hit. When lightning attaches to the blade surface instead of the air-terminal, the blade and sometimes the entire wind turbine may be destroyed resulting in downtimes, loss of wind turbine, expensive cost of repair and can cause some power companies to shut down and dismantle. Damage incidences has been recorded as well as increased insurance claims.
Numerical model to determine lightning attachment point distributions on wind turbines according to the revised IEC , S. Madsen and H. Madsen and K. Verifications of the safe locations in a wind turbine during thunderstorms, H. Erichsen, S.