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A Calculation and Evaluation Method of Insulation Gas Condensation Temperature

An evaluation method and technology of insulating gas, applied in the field of calculation and evaluation of dew condensation temperature, which can solve problems such as the lack of a clear calculation method for dew condensation temperature.

Active Publication Date: 2020-02-04
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are theoretical calculation formulas for the calculation of condensation temperature. However, considering that electric high-voltage equipment is a closed system, and there is an adsorption-desorption equilibrium of water vapor inside, there is no definite calculation method for the condensation temperature in this state.

Method used

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  • A Calculation and Evaluation Method of Insulation Gas Condensation Temperature
  • A Calculation and Evaluation Method of Insulation Gas Condensation Temperature
  • A Calculation and Evaluation Method of Insulation Gas Condensation Temperature

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Embodiment

[0035] Method step description:

[0036] A method for calculating and evaluating the dew condensation temperature of insulating gas, which is applied to the calculation and evaluation of the dew condensation temperature inside gas-insulated power equipment. First, get the moisture content value (humidity value, the same below) inside the gas chamber of the electrical equipment through testing; then, record the ambient temperature and the pressure of the gas chamber involved in the test; and then test and record according to whether there is an adsorbent in the gas chamber The obtained data are substituted into different condensation calculation formulas to obtain the condensation temperature of the air chamber; finally, the calculated condensation temperature is compared with the lowest temperature of the environment where the electrical equipment is located. Flowchart such as figure 1 .

[0037] Further characterization of the method steps:

[0038] The electrical equipmen...

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Abstract

The invention relates to a calculation and evaluation method of an insulating gas condensation temperature. The method mainly comprises the following steps: firstly, recording a pressure value and an environment temperature of an air chamber and testing to obtain a moisture content value in the air chamber of electric equipment; according to whether an adsorbent exists in the air chamber or not, substituting recorded and tested data into a corresponding condensation temperature calculation formula, so as to obtain a condensation temperature; and comparing the obtained condensation temperature with a lowest temperature of the environment of the electric equipment, thus obtaining a conclusion. Compared with the prior art, the calculation and evaluation method has the advantages that the existence condition of the adsorbent is considered, the obtained condensation temperature accords with an actual value, the formulation of an overhauling plan, caused by the fact that the humidity is too high, is relatively reasonable and the like.

Description

technical field [0001] The invention relates to a method for calculating and evaluating the condensation temperature, in particular to a method for calculating and evaluating the condensation temperature of insulating gas. Background technique [0002] The humidity (moisture content) of the insulating gas is one of the important bases for the status evaluation of gas-insulated equipment such as GIS. One of the hazards of high humidity in high-voltage equipment is that when the temperature drops, condensation is easy to condense inside the equipment and cause flashover. However, during power outage maintenance or live detection tests, it is often found that the humidity in the air chamber of some normally operating equipment is abnormal or even too high. There are strict regulations on the humidity value in high-voltage electrical equipment at home and abroad, such as IEC60694 stipulates the maximum allowable value of moisture in the equipment (400Pa, Td=-5℃); Siemens, a wel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G01N25/12
CPCG01N25/12G06F30/20
Inventor 邓先钦潘莹厉敏宪高凯
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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