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Harmonic coupling modeling method and system for AC-DC power grid

A technology of DC power grid and AC power grid, applied in AC network to reduce harmonic/ripple, AC network circuit, power transmission AC network, etc., can solve problems such as increased reactive power consumption, small resistance per unit length, permanent damage, etc. , to achieve the effect of improving the predictive ability

Pending Publication Date: 2022-03-01
EAST INNER MONGOLIA ELECTRIC POWER COMPANY +2
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Problems solved by technology

[0002] Canada and the United States each built 400mm 2 The 735kV and 760kV voltage level power grids with four split conductors, because the unit length resistance of the 735kV and 760kV voltage level grid conductors are relatively small, the geomagnetic induced current (geomagnetic induced current, GIC) generated by the geomagnetic storm in the 735kV and 760kV power grids is relatively large, 1989 The strong geomagnetic storm on March 13, 2010 caused a major blackout in the 735kV and 760kV power grids in North America and caused a major blackout in the 735kV power grid in Quebec, Canada, and caused 60 Many transmission lines and substation transformer protection devices tripped one after another, and many plant transformers in the United States were permanently damaged due to excessive temperature rise caused by harmonics

Method used

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  • Harmonic coupling modeling method and system for AC-DC power grid
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  • Harmonic coupling modeling method and system for AC-DC power grid

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Embodiment Construction

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0048] The purpose of the present invention is to provide a harmonic coupling modeling method and system for AC and DC power grids, so as to realize the calculation and analysis of the harmonic distribution of the AC and DC power grid under the influence of geomagnetic induction current, and then improve the risk of harmonics caused by the geomagnetic induction current of the power grid. Ability to predict.

[0049] In order to make the above objects, features...

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Abstract

The invention provides an AC / DC power grid harmonic coupling modeling method and system. The method comprises the following steps: acquiring historical data of an inductive geoelectric field when a geomagnetic storm occurs; constructing an alternating current power grid transformer harmonic source model, a direct current power grid converter transformer harmonic source model, a direct current power grid converter bridge harmonic source model, a direct current power grid harmonic network model and an alternating current power grid harmonic network model according to the induced earth electric field historical data during geomagnetic storm; and constructing an AC-DC power grid harmonic coupling model based on the AC power grid transformer harmonic source model, the DC power grid converter transformer harmonic source model, the DC power grid converter bridge harmonic source model, the DC power grid harmonic network model and the AC power grid harmonic network model. According to the method, the harmonic coupling model of the AC-DC power grid is constructed, so that the harmonic distribution of the AC-DC power grid under the influence of the geomagnetic induction current can be calculated and analyzed, and the capability of predicting the harmonic risk caused by the geomagnetic induction current of the power grid is improved.

Description

technical field [0001] The invention relates to the technical field of AC and DC power grids, in particular to a harmonic coupling modeling method and system for AC and DC power grids. Background technique [0002] Canada and the United States each built 400mm 2 The 735kV and 760kV voltage level power grids with four split conductors, because the unit length resistance of the 735kV and 760kV voltage level grid conductors are relatively small, the geomagnetic induced current (geomagnetic induced current, GIC) generated by the geomagnetic storm in the 735kV and 760kV power grids is relatively large, 1989 The strong geomagnetic storm on March 13, 2010 caused a major blackout in the 735kV and 760kV power grids in North America and caused a major blackout in the 735kV power grid in Quebec, Canada, and caused 60 Many transmission lines and substation transformer protection devices tripped one after another, and many plant transformers in the United States were permanently damaged...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20H02J3/00H02J3/01H02J3/36G06F113/04
CPCG06F30/20H02J3/00H02J3/01H02J3/36G06F2113/04H02J2203/20H02J2203/10H02J2003/365Y02E40/40Y02E60/60G06F30/367
Inventor 曹阳杨培宏刘万福党伟经慧英刁凤新孙睿
Owner EAST INNER MONGOLIA ELECTRIC POWER COMPANY
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