Simulation of the potential and electric field distribution on high voltage insulator using the finite element method

Abstract

The knowledge of the distribution of the electric field within and around high voltage equipment is a crucial aspect of the design, exploitation and performance of high voltage insulators. It could be useful for the detection of defects in insulators. The objective of this study is predicting the behavior of polluted insulator under AC voltage. For thus, the distribution of the potential and the electric field along high voltage insulator is investigated using a numerical method. The commercial Comsol Multiphysics proved to be one of the best software used in 2D modeling. The potential and the electric field distributions along this insulator are simulated under various conditions: the two cases: clean and polluted insulators and applying different conductivity values. We used electrostatic 2D simulations in the AC/DC module. The results are auspicious and promising.

Experimental study of pollution and simulation on insulators using COMSOL® under AC voltage

“…The electric field is very intense, which explains the appearance of the electric arcs during the experimental tests. This fact is also highlighted in our anterior work [19]. The electric field is practically affected by the surface condition (polluted or clean) of the insulators string.…”

Analysis of the neutral grounding modes influence on the reliability characteristics of local systems with renewable energy sources

“…22, No. 1 (2021) Ostapchuk O, Kuznetsov V, Kruczek W, Kuznetsov V, Tsyplenkov D.: Analysis of the neutral modes ... 46 grounding, along with the fulfilment of the requirement to ensure reliability of power supply to consumers, serious attention is drawn to the main network parameters influencing the performance of power supply systems, these include: -insulation levels and overvoltage resistibility (overvoltage protection) [21,22]; -provision of single-phase-to-ground failure protection and its performance; -selectivity of protection actions against ground failures; -safety protection from the effect of touch and step voltages at earth failure.…”

“…In this case, it is required to include a high-voltage resistor and devices for its connection into the neutral network, which in addition to switching devices may also include special transformers needed for the connection of resistors. In networks with ground-failure currents up to 5 A, additional capital costs decrease practically to zero, since in this case it is possible to manage available in the network measuring transformers and low-voltage resistors [21].…”

Effects of Broken Skirts and Pollution on Voltage Distribution for Cap and Pin Glass Insulators

“…Due to the better knowledge regarding the materials characteristic's parameterization used in broken and polluted insulators, simulated studies had become similar to studies with an experimental component. Recent studies with numerical simulation models of insulators demonstrate the validity of numerical techniques to estimate the electrical field and potential distribution on insulators such as the Boundary Element Method (BEM), the Finite Difference Method (FDM) and the, Finite Element Method (FEM), [1,2]. Generally, in engineering, the FEM has already been established for a long time and is a successful numerical method to solve electric field problems, using the discretization of the domain, as well as coupling with other physical processes (multi-physics), [2,3].…”