Online correction method for interference of DC (Direct Current) power transmission line on geomagnetic observation

A technology for DC transmission lines and DC lines, which is applied in the direction of DC network circuit devices, electromagnetic/magnetic exploration, circuit devices, etc. corners etc.

Active Publication Date: 2012-01-18
STATE GRID ELECTRIC POWER RES INST
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  • Abstract
  • Description
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Problems solved by technology

This method of equating the entire line to a long straight wire does not consider the radius of curvature of the earth and sea waves, nor does it consider the large number of corners in the actual transmission line. The derived calculation model is obviously too rough

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  • Online correction method for interference of DC (Direct Current) power transmission line on geomagnetic observation
  • Online correction method for interference of DC (Direct Current) power transmission line on geomagnetic observation
  • Online correction method for interference of DC (Direct Current) power transmission line on geomagnetic observation

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and examples, but these examples should not be construed as limiting the present invention.

[0021] In the present invention, through VB programming and ACCESS database technology, the information of all DC transmission lines and magnetic stations in various places in the country is unified on one platform, and according to the real-time observation data of DC transmission lines and geomagnetic stations, the DC is calculated according to the principle of magnetic field vector superposition The impact value of line interference on geomagnetic observation, and real-time geomagnetic Z component data correction.

[0022] The basic idea of ​​DC transmission line current and magnetic field calculation is to use the line tower as the node to calculate the magnetic field at each span of the line at the geomagnetic observation instrument, so as to obtain the magnetic fie...

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Abstract

The invention relates to an online correction method for the interference of a DC (Direct Current) power transmission line on geomagnetic observation. The method is used for accurately solving the interference level of a specific DC power transmission line on a specific geomagnetic observation station, and correcting interfered geomagnetic observation data. The online correction method comprises the following steps of: establishing the DC power transmission line and an online database system of a geomagnetic station, and acquiring imbalance current a real-time circuit and geomagnetic observation data through an online data input interface. In the method, a system software platform is established through a VB (Visual Basic) programming technology; the data required for calculation is acquired from a database and the online data input interface; current magnetic field produced by a DC circuit is calculated according to a spatial three-dimensional computation model of the DC power transmission line; a spatial current magnetic field vector obtained through the calculation is projected in a geomagnetic observation direction; the interference level of current of the DC circuit to geomagnetic Z-component observation is finally obtained; and a geomagnetic observation is corrected.

Description

technical field [0001] The invention belongs to the intersection field of high-voltage power transmission and transformation engineering electromagnetic compatibility and the monitoring of the earth's geomagnetic field. Specifically, it is a method for accurately solving the interference level of a specific direct current transmission line to a specific geomagnetic observation station, and correcting the disturbed geomagnetic observation data. method. Background technique [0002] my country is located in an area with frequent seismic activity, and seismic and geomagnetic monitoring stations all over the country undertake the important task of forecasting and monitoring seismic activity, and monitor geological activities by observing changes in the geomagnetic field. It is not easy to distinguish the DC magnetic field and the geomagnetic field signal generated by the DC transmission line under normal operating conditions, but if the transmission current is changed, switching...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/00G01V3/40
Inventor 万保权张小武谢辉春唐波张建功
Owner STATE GRID ELECTRIC POWER RES INST
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