Coupled Electrothermal Two-Dimensional Model for Lightning Strike Prediction and Thermal Modeling Using the TLM Method

Elkalsh, Ahmed; Sewell, P.; Benson, T.M.; Vuković, Ana

doi:10.1109/jmmct.2017.2683066

Cited by 6 publications

(5 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerical simulation of ionization at the segmented diverter was a challenging task which required simulation modeling of the electromagnetic heating effect of nonlinear plasma channels. Elkalsh et al [8] proposed a fully coupled two-dimensional (2D) multiphysics model to predict the arc discharge location and lightning channel using a transmission-line matrix (TLM) method and applied the model to 2D study of a diverter strip for aircraft lightning protection. Fractal theory was used to predict chaotic characteristics of lightning branches.…”

Section: Introductionmentioning

confidence: 99%

Plasma discharge characteristics of segmented diverter strips subject to lightning strike

Han

Wang

Xiong

et al. 2018

Plasma Sci. Technol.

View full text Add to dashboard Cite

In order to research segmented diverters for aircraft lightning protection, a transient 2D multiphysics model based on magnetohydrodynamics theory is proposed to predict the location of the arc plasma discharge and lightning channel, and to simulate the electrothermal behavior. Based on numerical calculation and preliminary analysis, factors that affect the breakdown voltage of the segmented diverter are discussed. The results show that the voltage increase rate of the voltage source, the width of the air gap between metal segments and the geometry of these segments influence the breakdown voltage of the strip. High-voltage tests of the segmented diverter are performed to reveal air breakdown of the strip and redirect the lightning current. Experimental and numerical results are compared to verify the correctness of the numerical model. The ionization of the air gap between metal segments and the breakdown voltage of the strip calculated by the model are qualitatively consistent with experimental results. The breakdown voltage of the segmented diverter is far lower than the lightning voltage. When a lightning strike occurs, the segmented diverter can be quickly ionized to form a plasma channel which can guide the lightning current well.

show abstract

Section: Introductionmentioning

confidence: 99%

Plasma discharge characteristics of segmented diverter strips subject to lightning strike

Han

Wang

Xiong

et al. 2018

Plasma Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…The thermal UTLM is unconditionally stable for all positive time step ∆t because all electric component quantities are positive and hence physical. One only needs to consider whether the wave behaviour is much less significant than the diffusion behaviour [4], which means that the inductive reactance ωL due to the error inductance (23) should be much less than the resistance in series (12) (13). Substituting the capacitance (18) (19) into this relationship yields…”

Section: Transmission-line Modelmentioning

confidence: 99%

“…The TLM method, originally developed for microwave applications, has been developed to solve diffusion equations via modelling the diffusion process as low-frequency waves in highly lossy media [4,5]. Over the years, it has been applied to a variety of thermal diffusion problems such as the modelling of the heat conduction in transistors [7,8], microwave food heating [9,10], biomedical applications [11,12] and nanoplasmonic heating [13]. Most of the reported methods Manuscript received Month Day, Year; revised Month Day, Year.…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Thermal Diffusion Equation Solver Based on Unstructured Transmission-Line Modelling and Optimal Delaunay Triangular Meshes

Yan

Vuković

Sewell

et al. 2022

IEEE J. Multiscale Multiphys. Comput. Tech.

Self Cite

View full text Add to dashboard Cite

The transmission-line modelling (TLM) method has been widely applied to many areas including electromagnetic and heat conduction problems. Its unstructured version, unstructured TLM (UTLM), however, has not hitherto been fully exploited in thermal diffusion problems. This paper derives in detail a thermal UTLM scheme to solve the two-dimensional diffusion equation numerically based on the optimal Delaunay triangular (ODT) mesh.

show abstract

“…A lightning strike is a natural phenomenon caused by an electric discharge from the atmosphere to an object on the ground. A direct strike on a transmission line can cause a massive impact on the overall power system [1]; it can generate heat [2], an electromagnetic field [3], a high electric current amplitude [4], or a transient signal, and an overvoltage [5] from the discharge can cause power outage, thereby influencing the reliability and stability of the power system. There is a high probability of lightning striking the overhead ground wire, the ground near the transmission tower, and the conductor, owing to the nature of lightning phenomena.…”

Section: Introductionmentioning

confidence: 99%

Identify Direct Lightning Strike Location Based on Discrete Wavelet Transform for 115-kV Transmission System

Chiradeja

Ngaopitakkul

2022

IEEE Access

View full text Add to dashboard Cite

This paper proposes three techniques for locating lightning strikes in a 115 kV transmission system over 88.5 km, based on the arrival time of a transient wave obtained from a discrete wavelet transform (DWT). The first technique calculates the location based on the 'type D' travelling wave method. The second technique analyses the first arrival time and same reflected-back wave arrival time between two substations. In the third technique, two sensors are installed to record arrival times at each sensor. Case studies of direct lightning strikes to phase conductors (shielding failure) are simulated using the 'Alternative Transients Program/Electromagnetic Transients Program' (ATP/EMTP). The influences of three parameters are considered: inception angles, the phase of the conductor, and the position at which the lightning struck the transmission system. By performing an operation scheme for all techniques, a positive sequence current is calculated, using a three-phase current from the ATP/EMTP program which is converted using Clark's transform. A positive sequence current is extracted to several scales using the DWT, and the orders of arrival times for both substations are determined. After the arrival times are obtained, each technique uses a different order of arrival time for calculating the lightning location. By comparing the average error among the three techniques, it is shown that the arrival time of the two sensors' technique is less than that of the other techniques.

show abstract

Coupled Electrothermal Two-Dimensional Model for Lightning Strike Prediction and Thermal Modeling Using the TLM Method

Cited by 6 publications

References 26 publications

Plasma discharge characteristics of segmented diverter strips subject to lightning strike

Plasma discharge characteristics of segmented diverter strips subject to lightning strike

Two-Dimensional Thermal Diffusion Equation Solver Based on Unstructured Transmission-Line Modelling and Optimal Delaunay Triangular Meshes

Identify Direct Lightning Strike Location Based on Discrete Wavelet Transform for 115-kV Transmission System

Contact Info

Product

Resources

About