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Voltage acquisition method and system for on-line monitoring of lightning arrester

An acquisition method and lightning arrester technology, applied in the direction of measuring current/voltage, measuring electrical variables, instruments, etc., can solve the problem of inability to accurately obtain the voltage used for online monitoring of lightning arresters, and achieve the effect of accurate acquisition

Active Publication Date: 2018-03-16
XJ ELECTRIC +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a voltage acquisition method for on-line monitoring of arresters to solve the problem that the voltage for on-line monitoring of arresters cannot be accurately obtained

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  • Voltage acquisition method and system for on-line monitoring of lightning arrester
  • Voltage acquisition method and system for on-line monitoring of lightning arrester
  • Voltage acquisition method and system for on-line monitoring of lightning arrester

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Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0027] The invention provides a voltage acquisition method for on-line monitoring of lightning arresters. The lightning arrester is connected to a bus through a connecting line, and the voltage of the connecting line is collected as a line extraction voltage, and the line extraction voltage and the collected voltages of each bus are transmitted to the line lightning arrester voltage extraction unit. ; Discrimination is carried out in the voltage extraction unit of the line arrester, and the discrimination steps are as follows:

[0028] 1). Judging whether there is voltage in the line extraction voltage, if there is no voltage, then do not obtain the voltage for arrester monitoring; if there is voltage, go to step 2);

[0029] 2). Determine whether each busbar is under pressure. If there is no pressure, go to step 4). is 3);

[0030] 3). Set an error range t...

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Abstract

The invention relates to a voltage acquisition method and an acquisition system for on-line monitoring of arresters. The line extraction voltage and the collected bus voltages are transmitted to the line arrester voltage extraction unit; the following discrimination method is carried out in the line arrester voltage extraction unit: judging whether the line extraction voltage If there is no voltage, the voltage acquisition for arrester monitoring will not be performed; if there is voltage, it will be judged whether there is voltage on each busbar, and the busbar with voltage will enter the judgment, and the busbar without voltage will not be judged. Whether the voltage deviation of the voltage bus is within the error range, if it is within the error range with only one bus, then use this bus voltage as the voltage for online monitoring of the arrester; if it is within the error range with two or more buses, use the deviation The minimum bus voltage; if it is not within the error range, the three-phase voltage is self-generated for the line extraction voltage, and the self-generated three-phase voltage is used as the voltage for online monitoring of the arrester.

Description

technical field [0001] The invention relates to a voltage acquisition method and an acquisition system for on-line monitoring of lightning arresters, belonging to the field of on-line monitoring of electric power systems. Background technique [0002] The research shows that the resistive current component flowing through the arrester can effectively reflect the deterioration degree of the arrester, and the accurate calculation of the resistive current of the arrester must be based on the actual voltage signal and leakage current signal of the arrester. Therefore, the accurate real-time acquisition of voltage signals is the key to accurately calculate the resistive current of the arrester on-line monitoring device. [0003] In the current online monitoring voltage extraction methods of line arresters, the common methods are: [0004] (1) Realization method of distinguishing and extracting the actual withstand voltage of arrester based on bus voltage, attached figure 1 An e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00
Inventor 路光辉梁武民曾国辉王伟杰庒益诗雍明超牧继清周钟郭旭梁东森王国玉
Owner XJ ELECTRIC