Statistical Distribution of Energization Overvoltages of EHV Cables

Transmission Lines Energization: Relevant Factors on Statistical Evaluation of Transient Overvoltages

This paper aims to evaluate important factors that affect switching transients overvoltages during transmission line energization. These factors include the number of repetitions to ensure the statistical characteristic of the study, the variation range of the mean closing time of the circuit breaker contacts, the model used for the representation of the transmission line and the influence of t...

Short Literature Survey on the Reliability of Ehv Xlpe Cables

An Analysis of Transient Overvoltages during the Energization of Electric Ship Propulsion Systems

This paper addresses the resonance phenomena that can occur in an isolated distribution system during transient events such as repeated energizations or power converter switching. In particular, the aim of this study is to analyze the energization of an onboard radial distribution system installed on an electric ship and to determine how the various leakage parameters that can cause resonance p...

Insulation coordination of MV cables against lightning - induced overvoltages generated by LEMP - coupled overhead lines

-The paper deals with the stresses of cable insulations due to lightning induced overvoltages for the case of distribution networks composed by MV overhead lines and buried cables. We are here interested only in the conditional probability of the cable breakdown in absence of line flashovers, which means that flashovers along the overhead line are disregarded. We illustrate a procedure based on...

On-line Partial Discharge Assessment and Monitoring of MV to EHV Cables

To effectively manage their electricity networks, owners and operators around the world have a very real need to understand the condition of their often ageing Transmission and Distribution assets. Of all the major asset classes, underground cables often have the least available condition data but at the same time have a significant impact on network performance. One of the predominant causes o...