Method for calibrating on-line chromatographic monitoring device of transformer station without shutdown

A technology of monitoring device and calibration method, which is applied in measurement devices, instruments, scientific instruments, etc., can solve problems such as unstable operation of equipment, uneven quality, poor accuracy, etc., to avoid economic losses and adverse social effects, and ensure safety and stability of the economy. The effect of running and avoiding grid accidents

Inactive Publication Date: 2016-11-09
STATE GRID HEBEI ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

At present, there are many kinds of online chromatographic analysis systems in the market, with different functions, and good and bad are mixed. my country has a vast territory. Only one power company in one province has more than 200 sets of online chromatographic monitoring devices in operation. More than half of the equipment is unstable due to high failure rate and accurate It is out of service due to poor sex and other reasons

Method used

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  • Method for calibrating on-line chromatographic monitoring device of transformer station without shutdown
  • Method for calibrating on-line chromatographic monitoring device of transformer station without shutdown
  • Method for calibrating on-line chromatographic monitoring device of transformer station without shutdown

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Embodiment 1

[0031] This embodiment is part of the content of the calibration report of the main transformer online chromatograph at a certain site, the details are as follows:

[0032] 1. Verification content and requirements

[0033] 1.1 Measurement error test

[0034] 1.1.1 Standard oil sample preparation

[0035] 1.1.1.1 After injecting new transformer oil into the calibration instrument, a certain amount of standard single-component gas (H 2 , CO, CO 2 、CH 4 、C2 h 6 、C 2 h 4 、C 2 h 2 ), fully mixed with transformer oil under the condition of 60°C in the calibrating instrument, and prepared a certain concentration of "standard oil sample containing seven components". The concentration of each gas component in the prepared standard oil sample was determined by a laboratory gas chromatograph.

[0036] 1.1.1.2 The concentration of components in the standard oil sample shall refer to the following requirements:

[0037] 1.1.1.2.1 The lowest detection limit (allowable deviation -...

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Abstract

The invention relates to a method for calibrating an on-line chromatographic monitoring device of a transformer station without shutdown. The method comprises the following steps: allowing an oil outlet and an oil return opening of a chromatographic calibrating apparatus to be communicated with an oil inlet pipe and an oil outlet pipe of the on-line monitoring device respectively so as to form a basic loop of an on-line monitoring device calibration system; preparing a standard oil sample for calibration in the chromatographic calibrating apparatus; opening the basic loop of the on-line monitoring device calibration system through a control valve and starting the on-line monitoring device for detection of the concentration of gas dissolved in the standard oil sample prepared in the chromatographic calibrating apparatus; introducing carrier gas into a chromatographic instrument for 10 min; starting the chromatographic instrument, weighing a certain amount of the standard oil sample from the chromatographic calibrating apparatus after the base line of the chromatographic instrument becomes stable, and detecting the standard oil sample by using the chromatographic instrument; and respectively recording the detection data of the on-line monitoring device and the chromatographic instrument, and on the basis of the detection data of the chromatographic instrument, analyzing whether the relative measurement errors and repeatability of the on-line monitoring device meets requirements.

Description

technical field [0001] The invention relates to a non-stop calibration method for an online chromatographic monitoring device in a substation. The device can be used as an on-line monitoring device for dissolved gas in transformer oil in a substation, a power plant, etc. to perform calibration without stopping the machine. Background technique [0002] Transformer is one of the important electrical equipment in power system, once it breaks down, it will bring serious consequences. It is a recognized effective means to ensure the safe operation of transformers by analyzing the content of dissolved gas components in transformer oil by gas chromatography to monitor the health status of transformers. At present, there are many kinds of online chromatographic analysis systems in the market, with different functions, and good and bad are mixed. my country has a vast territory. Only one power company in one province has more than 200 sets of online chromatographic monitoring device...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
CPCG01N30/02G01N2030/025
Inventor 刘克成马慧芳张立军王娟怡王艳
Owner STATE GRID HEBEI ELECTRIC POWER RES INST
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