Alashan Protection Of Long Distance Transmission Line Special Problem Analysis And Countermeasure

Alxa League in the Inner Mongolia Autonomous Region’s western, its vast. Because of its vast territory, industrial zone dispersion. Due to the unique geographical location, no power point support, so the formation of the Alashan power grid unique network structure and long distance, light load, multistage cascade power supply power supply mode. In order to balance long distance transmission have excess reactive power, power network configuration of a large number of reactor on the balance.In Alashan special power transmission line operation were found in high frequency protection time delay of export issues. In this paper, the operation of high frequency protections protection action during the collection and the influence of high frequency protection delay action for each investigation, to find the exact cause of time delay protection exit. Due to the particularity of Alashan power grid, Alashan Power Bureau with the Beijing Quartet company of Alashan power grid system model was build, protection action simulation experiment, test of high frequency protection device in Alashan grid adaptive. Through analysis and experiment analysis of high frequency protection delay action delay action causes, and for the reasons put forward solutions.