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High-voltage cable induction parameter estimation method and system and readable storage medium

A technology of sensing parameters and high-voltage cables, applied in information technology support systems, fault locations, etc., can solve the problems of errors, difficult to meet the parallel, symmetry, and equal-length assumptions of electromagnetic field theory, and achieve the effect of improving estimation accuracy.

Pending Publication Date: 2022-08-09
STATE GRID CORP OF CHINA +1
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Problems solved by technology

However, because the actual cable line is limited by the laying conditions and the magnetic induction coupling is nonlinear, it will be difficult for this method to satisfy the parallel, symmetrical, and equal-length assumptions of the electromagnetic field theory, resulting in a large error between the actual induction parameters and the theoretical calculation parameters

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  • High-voltage cable induction parameter estimation method and system and readable storage medium
  • High-voltage cable induction parameter estimation method and system and readable storage medium
  • High-voltage cable induction parameter estimation method and system and readable storage medium

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Embodiment Construction

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Thus, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0023] It sh...

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Abstract

The embodiment of the invention provides a high-voltage cable induction parameter estimation method and system and a readable storage medium, and the method comprises the steps: obtaining a sheath current generated at a preset detection point for a long-distance high-voltage cable line composed of a plurality of three-phase nine-section crossed interconnection cable basic units, the detection points comprise direct grounding points arranged at the left end and the right end of the high-voltage cable line. According to the superposition calculation relation between the sheath current and the capacitance current generated at each section of the cable, the induction current generated in the line loop is calculated; under the condition that multiple non-ideal conditions in actual working conditions are considered, induction parameters are estimated according to the induction current, and the induction parameters comprise the self-inductance of the protection layer, the mutual inductance of the A-phase conductor to the B-phase protection layer, the mutual inductance of the A-phase conductor to the C-phase protection layer and the mutual inductance of the B-phase conductor to the C-phase protection layer.

Description

technical field [0001] The present application relates to the technical field of induction parameter estimation, and in particular, to a high-voltage cable induction parameter estimation method, system, and readable storage medium. Background technique [0002] High-voltage cable induction parameters are crucial for ground fault diagnosis, reactive power compensation, and relay protection. At present, the existing technology mainly relies on the electromagnetic field theory to calculate the induction parameters, and there is no online estimation method for the actual parameters. However, because the actual cable line is limited by the laying conditions and the magnetic induction coupling is nonlinear, it will be difficult for this method to satisfy the assumptions of parallel, symmetrical and equal length of the electromagnetic field theory, resulting in a large error between the actual induction parameters and the theoretical calculation parameters. SUMMARY OF THE INVENTI...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCG01R31/083G01R31/088Y04S10/52
Inventor 李新国曾海燕杨斌高新昀涂京郭浩然谢诚陈阳
Owner STATE GRID CORP OF CHINA
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