Geomagnetic disturbance geoelectric field calculation method based on block geoelectric structure

Abstract

The invention belongs to the technical field of crossing of power systems and geophysics, and relates to a geomagnetic disturbance geoelectric field calculation method based on a block geodetic electrical structure, which comprises the following steps: S1, establishing a block geodetic three-dimensional electrical structure model; s2, adopting a geoelectric field algorithm based on a Maxwell equation; s3, calculating a geoelectric field component magnitude of the geomagnetic storm GMD; and s4, determining the maximum value and direction of the geoelectric field component of the geomagnetic storm GMD. According to the method provided by the invention, the ground is partitioned according to the city-level jurisdiction of the provincial power grid, the three-dimensional electrical structure model of the ground is established according to the city-level jurisdiction, the geoelectric field of the geomagnetic storm GMD is calculated, and then the GIC of the power grid of each region is calculated, so that the calculation precision and the calculation speed of the geoelectric field of the geomagnetic storm GMD and the GIC of the power grid are improved.

Description

technical field [0001] The invention belongs to the interdisciplinary technical field of electric power system and geophysics, and relates to a geomagnetic disturbance geoelectric field calculation method based on block geoelectric structure, in particular to a geomagnetic disturbance (geomagnetic disturbance, GMD) of a geomagnetic storm that affects an AC power grid. Electric field calculation method. Background technique [0002] The geomagnetic storm described in the present invention refers to the geomagnetic storm caused by the intense activity of the solar magnetic field. The GMD of the geomagnetic storm induces an electric field on the ground, and the geomagnetic storm induced current (GIC) generated by the electric field in the power grid affects the safe operation of the power grid. Accurate calculation of geoelectric field is the basis for calculating GIC, and then evaluating the impact of GIC on power grid stability and disaster prevention. The previous algorith...

AI Technical Summary

Problems solved by technology

The previous algorithm based on large-area geomagnetic storm geoelectric field has a large computational workload and long calculation time. It is only suitable for offline analysis of power grid GIC, and is not suitable for online analysis of GIC accident handling in power grid operation scheduling, which affects the speed of power grid GIC accident handling.

[0003] For the algorithm of GMD geoelectric field, the current algorithm based on plane wave theory believes that the geoelectric field of the whole research area or a certain area is the same, and the algorithm does not fully consider the geoelectric structure of the large area studied or a certain area. Therefore, it will affect the accuracy of the grid GIC calculation results; in addition, the use of the finite element method to calculate the geomagnetic storm geoelectric field in a large area requires a large number of grids for adaptive division, a large calculation workload and a long calculation time

Images