Damp and dew condensation control device and system applied to high-voltage switchgear

Abstract

The invention provides a damp and dew condensation control device and system applied to a high-voltage switchgear,and relates to the technical field of electric power equipment,wherein the damp and dew condensation control device applied to the high-voltage switchgear comprises a first controller and a rotating wheel dehumidifier which are connected,a second controller and a switchgear,the first controller and the second controller are connected with a control end,the control end generates a dehumidifying instruction after receiving a first external trigger,the first controller generates a rotating wheel driving signal according to the dehumidifying instruction,and the rotating wheel dehumidifier filters out moisture in the air under the control of the rotating wheel driving signal to obtain dry air,the control end generates a target searching instruction after receiving a second external trigger,the second controller searches the switchgear which needs to be dehumidified according tothe target searching instruction,and controls the opening of the ventilation valve of the switchgear,so that the switchgear carries out dehumidifying by introducing the dry air through the opened ventilating valve,so that the problem of dew condensation in the high-voltage switchgear can be conveniently and quickly solved.

Description

technical field [0001] The invention relates to the technical field of electric power equipment, in particular to a moisture condensation prevention device and system applied to a high-voltage switch cabinet. Background technique [0002] As a kind of power equipment widely used in urban power supply and distribution systems, the high-voltage switchgear will affect its normal operation status due to changes in the temperature and humidity of its internal environment, as well as the completeness of airtightness. When the switchgear is overhauled, it will inevitably cause external humid air to enter the inside of the cabinet, which will easily cause moisture condensation inside the switchgear. If the switchgear is in such an environmental state for a long time, the cabinet body will Various vicious short-circuit faults are prone to occur inside, including single-phase short-circuit, two-phase short-circuit, and even three-phase short-circuit. In addition, long-term moisture c...

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Problems solved by technology

[0004] However, when the heating and dehumidification technology is used, since the moisture still remains in the cabinet, when the external environment cools down sharply, the metal shell of the switch cabinet acts as a good conductor of heat, and its temperature will also drop rapidly to reach the dew point temperature. The moisture retained in the body can still be converted into condensation, and condense on the surface of the electrical components in the cabinet, thus failing to achieve the purpose of dehumidification in the cabinet

However, the heating and dehumidification method cannot solve the problem of condensation formed when the ambient temperature changes rapidly, that is, if the ambient temperature changes rapidly, the temperature of some electrical components in the cabinet will quickly drop to the dew point to form condensation. At this moment, the humidity inside the cabinet will drop instead, making it impossible for the outside world to judge that condensation has occurred, and thus cannot continue to eliminate condensation

[0005] To sum up, at present, there is no favorable solution to the problem that the condensation in the high-voltage switchgear cannot be effectively eliminated

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