Evaluative approach of transmission line and substation insulation failure probability in climate changing

Abstract

Due to many kinds of climate phenomena and changes, power transmission lines and substations have faced many events that cause some failures, outages and local blackouts which can have root in insulation behavior. Fine dust, as introduced recently, climate changing can effect on insulation equipment according to contamination probability function values and weather conditions that need to be evaluated in many situations, with and without climate changing, to obtain the new failure probability function based on area and zone contamination which is categorized initially. This paper at first presents failure mechanism for insulation and next, by using conceptual explanation, introduces a failure probability modeling to investigate the climate change effects on lines and substations. The movement acceleration (MA) index has been proposed with aim to be applied in preventively possess and any planning for decreasing the failure probability. The main concept of proposed MA index has been shown the trend of climate parameter changing which need to be inter as initial data in calculation and process for selection or design of an equipment in power system such as equivalent salt deposit density and any environmental specification. Based on the presented states that determine existence contamination levels of line routs and zones, the events and outages have been classified to determine the failure probability curves and showing the difference between pre-expected of insulation failures without climate changing. Khuzestan utility from Iran as an experimental case study has been investigated in this paper for realizing the hidden weather conditional effects and events.