Modeling partial discharge in a three-phase cable joint experiment with minimal adjustable parameters

Abstract

A general physical model of partial discharge (PD) has been developed and used to simulate discharges within a void at the tip of a metallic spike defect within a three-phase 11 kV paper insulated lead covered (PILC) cable joint. Discharges are modeled by altering surface charge density at the void boundary using a logistic function distribution. The model was validated against experimental data, and a good agreement was observed with minimal free parameters. The model was then used to investigate the impact of single phase energization on PD activity in three-phase PILC cable joints. It was concluded that PD testing of three-phase PILC cable joints should be performed at raised temperatures with the cable fully energized as this results in a higher frequency of PD activity, and reduces the level of background PD from cable terminations. This research represents a further step towards developing PD models that can describe measurements taken from operational high voltage plant.

Reliability and Life Prediction Algorithms of Insulated Cables Based on Wireless Network Communication

“…e rapid development of information and communication technology has brought great convenience to people's lives [7], but with the rapid expansion of user groups, the scale of business has also grown rapidly, which has brought an increasing burden on the field of communication networks [8]. At the same time, energy consumption has gradually become an important factor restricting global economic development and environmental protection, and the information and communication industry has become one of the industries with the largest energy consumption [6]. Figure 1 shows the distribution of energy consumption in wireless communication networks [9].…”

“…Callender et al simulate the discharge by changing the surface charge density at the boundary of the gap using a logistic function distribution then use this model to study the influence of single-phase energization on the partial discharge activity in the threephase PILC cable joints. e model can describe the measured values obtained from the high-voltage equipment in operation [6]. However, these scholars did not combine wireless network communication to predict and analyze the reliability and life of insulated cables.…”

Numerical modelling, simulation and experimental validation of partial discharge in cross‐linked polyethylene cables

“…where N PD is the generated electrons within the void per unit time due to the last discharge and is given as in (6) [32]…”

“…Cavities may also be created at the end surfaces of the insulation, particularly between the cable insulation and reinforcing insulation such as stress relief cone and winding rubber tapes during the installation or jointing of cables [3,4]. Cavities in the insulation near the cable terminations, resulting from the human intervention during installations or air trapping during the moulding process is a potential source of PD [5,6]. Since damage to the insulation is usually preceded by the occurrence of PDs, PD monitoring has been treated as a potential scheme for monitoring the condition of cables [3].…”

Assessment of creeping discharge initiated by metal particles on the silicone rubber/XLPE interface in cable joints

“…In [12], PD patterns of cable joints indicated that the existence of the defect inside the joint PD risks, was due to the obvious result of making bad process, meanwhile the oscillation detection technology effectively judged entirely correct. In [13], a metallic spike defect within a three-phase 11 kV cable joint was made, which investigated the impact of single phase energization on PD activity, but was not further used in high voltage plant. In [14][15][16][17][18], the typical defects in power cable such as protrusion defect of cable joint, void defect, interface filled with silicone oil, interface without silicone oil, the defect led to treeing breakdown, and the interface with conductive path in main insulation were designed, then PD patterns of each defect were discussed based on statistical calculation, and PD inception voltage and breakdown voltage were studied which indicated that the effect on interface silicone oil might be thought to be similar phenomena against discharge in oil impregnated insulation systems.…”