Lightning Protection and Grounding System Analysis
Summary
Lightning protection and grounding system analysis encompasses the study of how electrical discharges from the atmosphere interact with man-made structures and their earthing arrangements. At its core, the discipline seeks to control the flow of high-magnitude currents into the ground in a manner that minimises risk to people, equipment and infrastructure. Key considerations include the design of conductive paths to divert lightning currents safely, the assessment of earth electrode configurations to limit ground potential rise and touch or step voltages, and the characterisation of soil resistivity in multilayered strata. Modelling of transient phenomena under fast-front impulses informs the evaluation of overvoltages on overhead lines, substations and wind-turbine towers, while field measurements validate theoretical predictions. Advancements in numerical techniques—ranging from boundary-element and method-of-moments approaches to genetic-algorithm optimisation—have enhanced our ability to tailor grounding grids for diverse soil conditions and to predict the early-time and late-time behaviour of grounding systems. This research underpins international standards and guides the deployment of surge arresters, shielding wires and return-electrode networks in power-transmission and distribution applications worldwide.
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Lightning Protection and Grounding System Analysis publication trend
The graph below shows the total number of articles in lightning protection and grounding system analysis across all publications each year (not limited to Nature Index journals).
Technical terms
Step voltage: The potential difference experienced between a person’s feet when standing near a grounding electrode during a fault.
Touch voltage: The voltage between a grounded object and the feet of an individual touching it during a lightning or fault event.
Ground potential rise (GPR): The increase in earth potential around a grounding system when fault current flows into the ground.
Soil resistivity: A measure of how strongly soil opposes the flow of electric current, which varies with moisture, composition and layering.
Transient overvoltage: A short-duration voltage surge caused by lightning strikes or switching events, often modelled using fast-front and slow-tail waveforms.
References
- The Impact of Substation Grounding Grid Design Parameters in Non-Homogenous Soil to the Grid Safety Threshold Parameters. IEEE Access (2021).
- Transient behavior of wind towers grounding systems under lightning strikes. International Journal of Energy and Environmental Engineering (2015).
- Performance of Practical Grounding Systems under High Impulse Conditions. Energies (2018).
- Investigation and Optimization of Grounding Grid Based on Lightning Response by Using ATP‐EMTP and Genetic Algorithm. Complexity (2018).
- Analysis of Transient Behavior of Mixed High Voltage DC Transmission Line Under Lightning Strikes. IEEE Access (2019).
- Parameter Estimation of a Horizontally Multilayered Soil With a Fast Evaluation of the Apparent Resistivity and its Derivatives. IEEE Access (2020).
- Estimation of Soil Electrical Properties in a Multilayer Earth Model with Boundary Element Formulation. Mathematical Problems in Engineering (2012).
- Analysis of Transient Phenomena Due to a Direct Lightning Strike on a Wind Energy System. Energies (2012).
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