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Grounding electrode line direct current voltage transformer transient characteristic test method and device

A technology of DC voltage and transient characteristics, applied in the direction of measuring devices, instruments, and measuring electrical variables, etc., can solve the problems of low quality and efficiency of transient characteristics tests, achieve the effects of reducing errors, improving efficiency, and simplifying the data processing process

Pending Publication Date: 2021-12-31
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] This application provides a method and device for testing the transient characteristics of a DC voltage transformer on a grounding electrode line to solve the problem of low quality and efficiency in the transient characteristics test of traditional DC voltage transformers

Method used

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  • Grounding electrode line direct current voltage transformer transient characteristic test method and device
  • Grounding electrode line direct current voltage transformer transient characteristic test method and device
  • Grounding electrode line direct current voltage transformer transient characteristic test method and device

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Embodiment Construction

[0039] The embodiments will be described in detail hereinafter, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following examples do not represent all implementations consistent with this application. These are merely examples of systems and methods consistent with aspects of the present application as recited in the claims.

[0040] see figure 1 , is a schematic flow chart of a test method for the transient characteristics of a ground electrode line DC voltage transformer provided in the embodiment of the present application. from figure 1 It can be seen that the experimental method for the transient characteristics of the ground electrode line DC voltage transformer provided by this application includes:

[0041] S1: Get the harmonic voltage signa...

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Abstract

The invention provides a grounding electrode line direct current voltage transformer transient characteristic test method and device. The transient characteristic of a tested direct current voltage transformer is obtained through specific value error, phase error, step rise time and step response time characteristic vectors. A step response low value and a step response high value of a step response signal are obtained through a method of sampling a step response signal low value interval and a step response signal high value interval and averaging sampled data; the step rise time and the step response time characteristic vector of the step response signal are obtained through the step response low value and the step response high value of the step response signal to characterize the transient characteristics of the tested DC voltage transformer, so that the data processing process is simplified, the error is reduced, and the efficiency is improved.

Description

technical field [0001] The present application relates to the technical field of electric equipment detection, in particular to a method and device for testing the transient characteristics of a DC voltage transformer of a ground electrode line. Background technique [0002] A ground electrode is an array of conductive elements placed in the earth to provide a low resistance path between the DC circuit and the earth. The ground electrode line is an insulated line connecting the DC neutral bus of the converter station and the ground electrode, and is an important part of the HVDC transmission system. At the same time, DC voltage transformers, similar to transformers, are instruments used to transform voltage, and are mainly used for line protection and power measurement. In the grounding pole line laid by double circuits, two independent DC voltage transformers are installed in the converter station to measure the current, so as to realize the fault detection and protection ...

Claims

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Application Information

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IPC IPC(8): G01R35/02
CPCG01R35/02
Inventor 朱梦梦
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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