Simulation method for inhibiting condensation of switch cabinet

Abstract

The invention discloses a simulation method for inhibiting the condensation of a switch cabinet, and relates to the technical field of the insulation state evaluation of electrical equipment. The method comprises the following steps that: establishing a simplified switch cabinet model, and carrying out structured mesh generation; according to different heat transfer ways in the switch cabinet, calculating temperature in the switch cabinet; according to a moisture diffusion way in the switch cabinet, calculating moisture in the switch cabinet; and according to the calculated temperature and moisture, determining a condensation inhibition way. By use of the method, the detailed structure of the switch cabinet is simplified, moisture and temperature distribution in the switch cabinet in a process that moisture and temperature are mutually coupled is calculated, a ventilation device and a heating device are additionally arranged to research a measure for inhibiting condensation formation in the switch cabinet, and numerical calculation is used for verifying the effectiveness of the measure. The method has the advantages of small calculated amount and high calculation efficiency.

Description

technical field [0001] The invention relates to the technical field of electric equipment insulation state evaluation, in particular to a simulation method for suppressing condensation in a switch cabinet. Background technique [0002] As a power distribution equipment, high-voltage switchgear plays a very important role in the operation of the power grid, and the insulation capacity of the switchgear is an important factor for the safe and stable operation of the switchgear. In addition to the design, material and quality factors of the insulation capacity of high-voltage switchgear, switchgear insulation accidents frequently occur due to harsh environmental factors such as temperature, humidity and condensation in the indoor operating environment. The long-term operation experience of switchgear shows that the generation of condensation in the cabinet will lead to the decline of internal insulation performance, and various insulation defects will gradually develop into bre...

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Problems solved by technology

[0003] At present, the understanding of the condensation phenomenon in the switchgear is not deep enough, the physical process of the condensation, especially the energy and mass exchange mechanism in the condensation is still unclear, and the influencing factors on the condensation under different operating conditions are also lacking. For system analysis, it is urgent to establish a simulation model of condensation in the switchgear, in-depth study of its condensation process and influencing factors, and grasp the deterioration of insulation parts in the switchgear under the condition of humid air condensation, the corrosion process of metal parts, and the deterioration process of condensation in the cabinet insulation And detection, characterization and evaluation methods to guide the optimal design of anti-condensation in the switchgear and on-site maintenance operations

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