Probabilistic Safety Risk Assessment near Transmission Line Structures under Fault Conditions

The grounding system is an essential part of the transmission line system. In the last decade, more transmission lines have been constructed near urban areas that share the land with other public infrastructures, such as commercial lots, parks, playgrounds, walking trails, etc. This co-location raises safety concerns due to touch and step voltage hazards near transmission line structures under power line faulty conditions. In many countries, there is no national standard to tackle this concern and provide clear regulations. To overcome this issue, a probabilistic risk assessment method is utilized in this paper, which serves as a great tool to quantify this risk and make it possible to compare it with other common risks to develop acceptable criteria. A methodology is developed to determine the probability of risk, and each parameter used in the calculation is refined based on historical operational records and monitoring data.