Discharge mechanism in CO2: A study on possible occurrence of secondary discharges caused by field distortion during streamer or leader propagation

Since the introduction of SF6 in the 1950s, gas-insulated high voltage circuit breakers and Gas-insulated switchgear (GIS) have improved considerably, in particular concerning required drive energy for operation, compactness, and reliability. Nevertheless, high voltage insulation design has become increasingly challenging in recent years....

Board Level Vibration Testing and Qualification for Automotive Application

Revolutionary changes in automotive industry toward fully connected electrical vehicles is changing the world of Board Level Reliability (BLR) Vibration Testing. It is taking BLR Vibration tests beyond board level to board module application level.<br/>In this thesis, it contains the development of a reliability test concept called Board Module...

Determination of the Pre-Qualification Rules for the Acceptance Testing of MVDC Cable System

In the transmission and distribution network of the future, there is expected to be a mix of both Alternating Current (AC) and Direct Current (DC). In the high voltage division owing to technical and economic aspects, there is a wider use of High Voltage Direct Current (HVDC) instead of High Voltage Alternating Current (HVAC). However, when...

Feasibility Study for Usage of Optical Partial Discharge Detection in HV Cable Termination

Cable terminations are essential for connecting a cable to a piece of equipment such as a circuit breaker, transformer, motor, etc. Proper terminations are of great importance in order to provide faultless cable systems. Improper terminations could result in overheating, partial discharges, eventual breakdown, flashover and breakdown in the...