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Self‐inductance calculations are presented for coils of modular construction. Individual modules have a fixed winding density, so that a complete multi‐module coil will be characterized by larger inter‐turn spacing at its extremities to provide suitable insulation strength under impulse voltage conditions. Gives inductance computations using finite‐element analysis, so that empirical correction factors to take account of end‐effects and inter‐turn spacing are unnecessary. Comparison where possible with established empirical methods shows consistency. Gives an example of oscillatory high‐voltage tests.

This paper aims to present a novel Marx generator architecture designed to achieve a high repetition rate while minimizing charging losses. The proposed approach demonstrates how inductive charging can enhance efficiency and robustness in pulsed power systems.

This study begins with a theoretical analysis of the generator’s operation, followed by validation through numerical simulations and experimental tests.

The modified Marx generator achieves significant performance improvements, including a pulse amplitude of 50 kV, a rise time of 4.5 ns and a repetition rate of 50 pps. The results validate the effectiveness of inductive charging in reducing energy losses and improving system reliability.

This work introduces, simulates and experimentally validates an advanced Marx generator configuration. The findings highlight the potential of inductive charging to overcome the limitations of traditional resistive designs, offering a more efficient and reliable solution for high-frequency pulsed power applications.

This study aims to examine the effect of asymmetric aging (120 and 270 degrees) and symmetrical aging on the performance of silicone rubber insulators. The effects of different aged surfaces, pollution levels and humidity on flashover voltage (FV) have been experimentally investigated. Based on the laboratory results, a mathematical model has been presented to estimate the FV of insulators.

According to insulators constituent materials, polymer insulators are affected by environmental conditions, specifically by ultraviolet (UV) radiation. To investigate the effect of aging and environmental conditions on the insulator, two types of silicone rubber insulators were aged under UV radiation. Environmental conditions have been created by changing humidity in five levels and pollution in three levels. All tests have been performed on two virgins, two full aged and four asymmetric-aged insulators. Also, according to the effect of each parameter on the FV, a mathematical model has been presented for it.

UV aging causes the destruction of the silicon rubber insulator. The occurrence of flashover is one of the consequences of insulation failure. The enlargement of the aged surface has a nonlinear relationship with the reduction of the FV. By considering the effect of the aged surface, the accuracy of FV modeling can be increased. The results obtained from the mathematical model have shown that the estimation of the FV in different environmental conditions has an error of less than 5%. However, the modeling error is more than 15% if the effect of the aged surface is not considered.

In this work, it is intended to investigate the effect of asymmetric aging on the FV of the insulator. The obtained results have shown that the asymmetric aging surface is an important factor in changing the harmonic components of the leakage current, condition monitoring indicators and FV.

The purpose of this paper is to investigate the simultaneous effects of ionization and dispersion of soil on the impulse behavior of grounding electrodes under first and subsequent stroke currents.

A recently introduced technique called improved multi-conductor transmission line (MTL) is simplified for grounding electrodes buried in both-affected soils.

The simulation results show that including the two effects simultaneously in highly resistive soils under high-valued subsequent stroke current is recommended. Otherwise, simultaneous effects can be disregard.

To the best of the authors’ knowledge, there is no research on sensitivity analyses for the simultaneous inclusion of the two effects on the effective length and the induced voltage on the soil surface. To this end, the simplified MTL is applied to the grounding electrodes. The simulation results show that the computational efficiency in comparison with previous methods is, first, considerably increased. Second, the simultaneous effects result in decreasing the soil surface voltage with respect to situations where either ionization or dispersion is taken into account (single-affected soils). In other words, the performance of grounding systems is improved. Third, the effective length in both-affected soil is has a middle value with respect to the single-affected soil. Such findings practically and financially are of importance.

The purpose of this paper is to investigate the ionization and dispersion effects in combination with the inhomogeneity of soil simultaneously on the effective lengths of counterpoise wires.

Improved multi-conductor transmission line model is used for computing effective length of counterpoise wires considering all aspects of soils.

The simulation results show that the ionization and dispersion effects simultaneously results in placing the effective length between situations where only one effect is considered. Also, predicting formulae for effective length of counterpoise wires considering all effects are proposed.

A sensitivity analysis on the effective lengths of counterpoise wires considering all aspects of soils is carried out.