Three dimensional simulation of the arc inside an insulator-arrester with a multichamber system

Abstract

Based on the thermo-physical properties of plasma air, the temperature and flow fields of an insulator–arrester with a multi-chamber system are investigated using three-dimensional computational fluid dynamics. The plasma flow is assumed to be steady incompressible laminar flow and in local thermodynamic equilibrium. The results obtained show that the arc inside the chamber bends downwards, indicating that the Lorentz force induced is directed away from the exit and pushes plasma air down. The outlet also provides passage for plasma flow both in and out of the chamber.

Study on the Arc Motion Characteristics of Multi-Chamber Arrester Based on 3D Model

“…The arc plasma moves outside the chamber after 39.6 µs, during this process the temperature and brightness of the arc are constantly decreasing, as shown in Fig. 14 (7)- (11). After 92.4 µs, almost all the arc plasma moves out of the chamber, and the arc cannot be observed at 422.4 µs, as shown in Fig.…”

“…The effects of electrical conductivity, temperature, airflow velocity, current amplitude and structural parameters on arc motion in multi-chamber are analyzed [10], but the process in the simulation results is in the order of milliseconds, which is quite different from the experiment results, which is in the order of microseconds. The temperature field and velocity field of multi-chamber under different currents are analyzed and the results show that due to the Lorentz force reverse (toward the inside of the outlet), the arc is pushed into the chamber, causing the outlet to have both positive and negative airflows [11]. It has been showed that the instantaneous increase of temperature is the cause of the change of airflow velocity, and the chamber structure has a significant impact on the arc extinguishing effect [12].…”

Development of a Two-Temperature Mathematical Model of Plasma Processes in a Discharge Chamber of a Multi-chamber Arrester Operating in Conditions of Mountain Areas

“…Investigations of the physical processes that take place inside such devices have been carried out over the years to improve the efficiency of multi-chamber arrester operation. Along with experimental methods [4], theoretical studies using mathematical modeling become widespread [5][6][7][8][9][10]. The data obtained during experiments are used in the mathematical model as initial data as well as for the purpose of correcting the model.…”

Mathematical simulation of operation of multi-chamber arrester for lightning protection of power lines: calculation of thermophysical properties of nonequilibrium plasma

“…To improve the efficiency of multi-chamber arrester operation it is necessary to perform studies of the physical processes that take place inside such devices. Along with experimental methods [4], theoretical studies using mathematical modeling become widespread [5][6][7][8][9][10].…”