Simulation results of an Automatic Reclosing Device Mode and Operation Modeling for Too Long Overhead Lines

Abstract

Mongolia occupies a vast territory encompassing 1,564,116 square kilometers. However, due to its low population density, urban cities are mostly located far from one another, and electricity consumption can be relatively low. Also, 110 kV and 220 kV overhead power lines built in the urban areas of Mongolia tend to be longer than the standard. Therefore, Mongolia's power grid system differs from those of other countries due to these features. Furthermore, 110 and 220 kV overhead lines in Mongolia pass through high mountain regions and steppe regions at an average altitude of more than 1000 meters above sea level, providing electricity to consumers in adverse weather conditions. In addition, because it is not uncommon for electrical substations to be interconnected, the overhead lines are designed as a network that forms a system. In this case, the study of the operation, failure and outage of the overhead lines and electrical grid will play a significant role in improving the continuous reliability of the power supply. And the relay protection and automation equipment in the network should therefore be improved and made more flexible and smart. In our joint research, based on the results of the last ten years of data on overhead line outages, relay protection, and automatic reclosing device operation, we modelled a too-long-line automatic reclosing device that reflects the characteristics of Mongolia's electrical grids. As a final note, we have presented some of the results of the operation simulation of our model in this article.