Summary
This article presents the results obtained from the sensitivity study of induced transient overvoltages on electrical distribution networks, due to lightning discharges. This research is part of the development of a recording system of transient overvoltages, which involves telecommunication strategies and electromagnetic compatibility criteria for designing printed circuit boards. In addition, by having multiple recorders connected to an electrical distribution network of less than 13.2 kV, it is possible to infer some characteristics about the origin of the registered disturbances. The results of induced transient voltages on the electrical distribution network allow us to determine the dimension of the voltage conditioning system, specifically the capacitive divider, with respect to magnitude and frequency. The analysis was carried out by varying the plane of incidence of the TEM wave on the distribution network, in order to emulate cloud-to-ground, cloud-to-cloud and intracloud lightning discharges. The frequency response of the induced transient overvoltage was also verified on one edge of the network. In addition, the variation in matched and non-matched loads on the edges of the electric distribution network was analyzed to show the reflections caused by changes in characteristic impedances. Subsequently, the comparison of the frequency spectrum of the transient overvoltage was made at the recording point. Based on the sensitivity study, the actual model of the capacitive divider was selected. To do this, the variation in the components of the present model of high- and low-voltage capacitors was considered to select those that would transmit the signal to the transient overvoltages to recorder reliably. The noise and the difference with the source signal were identified to make adjustments at later stages regarding hardware or firmware aimed at the proper processing of the signal. The study was developed on the software CST studio through the Cable Studio module.
Additional informations
| Publication type | ISH Collection |
|---|---|
| Reference | ISH2017_482 |
| Publication year | |
| Publisher | ISH |
| File size | 1 MB |
| Pages number | 6 |
| Price for non member | Free |
| Price for member | Free |
Authors
PARADIS, TACKA, CHEN
