Progress Report on IEEE Standards for Selecting Insulators with Respect to Icing INMR Panel Discussion on Pollution and Icing - (PPT)

摘要

In some regions, partial or complete bridging of insulator dry arc distance by ice or snow leads to poor reliability, especially in the transition temperature range of -2 to 0°C. Ice and snow problems have always been sporadic on HV systems at 115 and 230 kV, but were recognized as a serious reliability constraint on some EHV and UHV systems in the late 1980s. This led to development of new test methods for these situations, incorporating high electric stress of up to 100 kV line-ground/mdryarc, compared to 70 kV/m on typical 230-kV systems. Sufficient experience in several countries led to formation of a series of IEEE Power and Energy Society (PES) and Dielectrics and Electrical Insulation Society (DEIS) task forces. After building consensus among experts around the world, these groups formalized a Guide to Test Methods and Procedures to Evaluate the Electrical Performance of Insulators in Freezing Conditions, IEEE Standard 1783-2009. Work is continuing on IEEE Standards Project P1820, a Guide on the Selection of Transmission and Distribution Insulators with Respect to Icing.