Study Of The Ultra-High Voltage Grid Parameter And Arithmetic Of Geomagnetially Induced Current

Geomagnetic storms in the network induced geomagnetically induced current (GIC) which largely threaten the power system. Along with the implementation of " the Eleventh Five-Year Plan" UHV construction scheme, China will form a large number of transmission lines which have the characteristics of the ultra-high voltage, large-capacity, long-distance. The thesis researches the UHV power grid transmission line parameters and the structure of the grid and the transformer the impact of current level of GIC , the work have important significance to the assessment of the ultra-high voltage power grid level and influence . The paper bases on the elements of GIC current circulation in the different grid , advances the assessment model in order to calculate the level of the GIC , factors which influence the GIC and the selection method of the grid parameter . We also advance the complex network equivalent method and the method of calculating equivalent model. Finally, I assess the result of the GIC in the 2010 planning ultra-high voltage power grid .