Rapid urbanization and industrialisation globally over the last three decades has triggered expanded interest in reliable electric power. High voltage (HV) stations and line-insulators are deployed extensively in power systems networks. The environmental stresses affect both mechanical and electrical performance of the insulators during service. Accumulation of pollution and surface contamination on the insulators can lead to an increase in leakage current and partial discharge (PD) activity and may result in premature failure of power systems. Surface flashover is one of the significant reasons for failure of high voltage insulators bringing about the loss of power supply and increase in the assembling, manufacturing and maintenance costs. These problems are particularly severe in coastal and remote locations. Sea salt contamination on High voltage stations and line-insulators still remains one of the main aspects to consider for design and dimensioning of insulators. A common phenomenon in the coastal areas is the rapid development of salt deposit on high voltage insulators due to wind originating from the seashore. This paper reviews the effect of sea salt contamination density on high voltage insulators, particularly, the effect of environmental stresses. Previous research on this subject is reported and numerous models produced for expected tainting levels is discussed. The aim of this research study is to develop a mathematical model correlating relationship between dependent (ESDD) and independent variables namely; wind velocity and direction. COMSOL multiphysics have been used for identifying high electric field stress on high voltage insulators and modelling the contaminated insulator in order to analyse surface flashover phenomena. Prediction of salty polluted insulators will be done with ceramic and non-ceramic materials model under AC voltage at different pollution levels and at different wind speed and directions.
|Publication status||Published - Jan 2015|
|Event||8th Universities High Voltage Network (UHVnet) Colloquium: HVDC Power Transmission Technologies - Staffordshire University, Stafford, United Kingdom|
Duration: 14 Jan 2015 → 15 Jan 2015
Conference number: 8th
|Conference||8th Universities High Voltage Network (UHVnet) Colloquium|
|Abbreviated title||UHVnet 2015|
|Period||14/01/15 → 15/01/15|