Power transmission lines electromagnetic pollution with consideration of soil resistivity

Abstract

The alternating current (AC) total interference of power lines may pose a threat to personnel and equipment in its vicinity. The main objective of this work is to determine the electromagnetic distribution and induced voltages on human body, equipment, and houses due to the AC total interference for different soil resistivities. The electromagnetic field and induced voltages may cause health problems to the human body and put it at risk. Two main approaches were used to compute the electromagnetic and induced voltages, namely the field approach, which is based on electromagnetic field distribution, and the circuit approach, which uses the circuit grounding analysis to compute the conductive interference and then uses the circuit based models to compute the inductive interference. Human body, steel houses and 10-km-long transmission line were modelled. The soil resistivity was varied, and the induced voltages obtained from both approaches were compared. Soil resistivity and soil structure are important parameters that affect the AC interference level. The results show that the touch voltage increases when the distance between electromagnetic source and human body increases. For high soil resistivity, the danger of the touch voltage becomes more prominent compared to that for low soil resistivity. Power system voltage level and soil resistivity are two key factors influencing the induced voltage level.

Comparison of Grounding Resistance Using Grounding Rod Electrodes with Different Fault Current Types in Podzolic Soil at Prabumulih Substation

“…In the existing electricity regulations in Indonesia, the grounding resistance value is highly demanded to reach a low value below 5 ohms, this is stated in PUIL 2000 and PUIL 2011 (Putra et al 2022). Multiple soil types make it extremely challenging to get a low resistance value (Elgayar et al 2019). The area near the Prabumuli substation has a podzolic soil type with features of yellow clay and gravel, thus it would be quite interesting to perform research on the grounding system utilizing different types of rod electrodes.…”

Patterns of sidemount four-bay FM antenna system

“…The downward radiation from the minor lobes can produce RF energy that leads to blanketing in FM receivers and expose the environment to excessive RF field around the vicinity of the tower [7][8][9][10][11][12]. Blanketing is a condition when there is excessive RF signal enough to overload the front-end of radio receivers making the demodulaton of the transmitted information difficult.…”