CN207474927U - It is a kind of for power distribution station high-tension switch cabinet in wet down anti-condensation system - Google Patents

Abstract

The utility model is a dehumidification and anti-condensation system used in a high-voltage switch cabinet of a power distribution station, which includes a switch cabinet (1) installed indoors, and the indoor ground is provided with cables for routing in the switch cabinet (1). cable trench (2), and an exhaust wall hole (3) is set on the indoor wall, and a cable trench fan (4) is set between the exhaust wall hole (3) and the cable trench (2), and the cable trench fan The air inlet end of (4) is connected to the cable trench (2), and the air outlet end of the cable trench fan (4) is connected to the exhaust wall hole (3); the system also includes an air inlet wall arranged on the indoor wall Hole (6), the air inlet wall hole (6) is connected to the air inlet of the fresh air fan of the system host (5), thereby introducing outside air. The utility model is a dehumidification and anti-condensation system used in a high-voltage switch cabinet of a power distribution station, which has good dehumidification effect, stable operation and high reliability.

Description

A dehumidification and anti-condensation system in a high-voltage switch cabinet for a power distribution station

technical field

The utility model relates to a dehumidification and anti-condensation system, in particular to a system applied in a substation to reduce the humidity in a cabinet space of a high-voltage switch so as to prevent dew condensation.

Background technique

At present, the distribution substation is the most basic unit at the bottom of the distribution network, with a wide range of distribution and a large number. Among them, the 10kv (20kv) metal-sealed switchgear is the most direct equipment for supplying power to users; its operation reliability is directly It is related to the quality of power supply and the reliability of power supply. On-site operation experience shows that the air quality in the switchgear of the station is poor (humidity, condensation). During the long-term operation, condensation will cause discharge between the busbars in the switchgear room and between the busbars to the ground, resulting in creepage. Electricity, pollution flashover and other accidents; therefore, it is necessary to reduce the humidity in the switchgear to prevent condensation;

Today, the conventional methods of dehumidification and anti-condensation in the switchgear are:

1. Install a dehumidifier in the station room; since the dehumidifier can only reduce the indoor air humidity, it cannot reduce the air humidity in the switch cabinet.

2. Increase the surface temperature of the parts that do not allow condensation in the cabinet through heating in the cabinet to make it higher than the dew point temperature of the surrounding air; this heating method is divided into two forms: one is to install a heater in the cabinet, depending on the situation The heater is turned on or off manually; the second is that in addition to the heater, the cabinet is equipped with a condensation sensor to control the switching of the heater.

There are the following problems for the first type of heater installed in the cabinet:

① After the temperature in the cabinet rises, it is easy to evaporate the water vapor in the cable trench at the bottom of the cabinet, which increases the humidity in the cabinet.

② It is necessary to manually turn on or turn off the heater, which is not conducive to the requirement of unattended stations.

③ Long-term heating energy waste is large.

For the second type of cabinet, in addition to the heater, there are the following problems in setting the condensation sensor:

① Condensation sensors are all passive actions. Sometimes the air humidity is very high, but since no condensation has formed at the condensation sensor, the heater will not start, that is, there is a certain amount of delay.

② Due to the inherent characteristic defects of the condensation sensor, it is not sensitive to changes in relative humidity.

③When the condensation sensor is eroded by chemical substances in dust and water, its sensitivity will be changed, resulting in deviation of the anti-condensation control point, thereby reducing the reliability of anti-condensation.

There is an urgent need for a dehumidification and anti-condensation system with good dehumidification effect, stable operation and high reliability.

Contents of the invention

The purpose of the utility model is to overcome the above disadvantages and provide a dehumidification and anti-condensation system for high-voltage switch cabinets in power distribution stations with good dehumidification effect, stable operation and high reliability.

The purpose of this utility model is achieved in that:

A dehumidification and anti-condensation system in a high-voltage switch cabinet for a power distribution station. The system includes a switch cabinet installed indoors. A cable trench for routing cables in the switch cabinet is provided on the ground of the room, and the indoor There is an exhaust wall hole on the wall, and a cable trench fan is arranged between the exhaust wall hole and the cable trench. The air inlet end of the cable trench fan is connected to the cable trench, and the air outlet end of the cable trench fan is connected to the exhaust wall. Hole;

The system also includes a system host installed indoors, the system host is provided with a power control board with a controller, the controller on the power control board is connected to the frequency converter, dehumidifier and air conditioner in the system host connected, and the shell of the system host is provided with a fresh air outlet and a cooling dehumidification outlet, the frequency converter controls the fresh air fan, and the outlet of the fresh air fan is facing the fresh air outlet, and the air outlets of the dehumidifier and the air conditioner are facing the cooling and dehumidifying outlet;

The system also includes an air inlet wall hole arranged on the indoor wall, and the air inlet wall hole is connected to the air inlet of the fresh air fan of the system host, thereby introducing outside air.

The utility model is a dehumidification and anti-condensation system used in a high-voltage switch cabinet of a power distribution station. The power control board of the system is also connected with an air conditioner remote control, a temperature and humidity sensor, a smoke sensor, a water immersion alarm device, A fire alarm device, an external equipment failure alarm device and a mobile terminal, wherein the mobile terminal communicates with the cloud center through a network.

The utility model is a dehumidification and anti-condensation system used in a high-voltage switch cabinet of a power distribution station. The temperature and humidity sensor includes an indoor temperature and humidity sensor installed on the indoor wall, and a hole wall installed The outdoor temperature and humidity sensor on the top, and the cable trench temperature and humidity sensor installed in the air duct of the cable trench fan.

Compared with the prior art, the beneficial effects of the utility model are:

Because the cable trench of the utility model is in a negative pressure state, only the air in the switch cabinet flows to the cable trench, and the moisture in the cable trench does not flow to the switch cabinet, thereby reducing the humidity in the switch cabinet; and by introducing external fresh air, Make the room in a positive pressure state to ensure that the fresh air continuously flows into the switch cabinet, thereby further reducing the humidity in the switch cabinet; The frequency converter of the fan, cable trench fan and air conditioner are automatically adjusted, so that the entire operation process can be managed unmanned; in addition, through the setting of the mobile terminal, the entire system can conveniently transmit various information to the outside world, not only for local The alarm can also be conveniently passed on to the remote service personnel.

Description of drawings

Fig. 1 is a structural schematic diagram of a dehumidification and anti-condensation system used in a high-voltage switch cabinet of a power distribution station according to the present invention.

Fig. 2 is a circuit block diagram of a dehumidification and anti-condensation system used in a high-voltage switch cabinet of a power distribution station according to the present invention.

in:

Switch cabinet 1, cable trench 2, exhaust wall hole 3, cable trench fan 4, system host 5, air inlet wall hole 6;

Fresh air outlet 5.1, refrigeration dehumidification outlet 5.2;

An indoor temperature and humidity sensor 101 , an outdoor temperature and humidity sensor 102 , and a cable trench temperature and humidity sensor 103 .

Detailed ways

Referring to Fig. 1 and Fig. 2, the utility model relates to a dehumidification and anti-condensation system used in a high-voltage switch cabinet of a power distribution station. The system includes a switch cabinet 1 installed indoors, and the indoor ground is equipped with a useful The cable trench 2 where the cables are routed in the switch cabinet 1, and an exhaust wall hole 3 is arranged on the indoor wall, and a cable trench fan 4 is arranged between the exhaust wall hole 3 and the cable trench 2, and the cable trench fan 4 The air inlet end is connected to the cable trench 2, and the air outlet end of the cable trench fan 4 is connected to the exhaust wall hole 3, so as to ensure that the cable trench 2 is in a negative pressure state, so that the wind flow direction between the cable trench 2 and the switch cabinet 1 is Flow from the switch cabinet 1 to the cable trench 2 to ensure that the moisture in the cable trench 2 will not enter the switch cabinet 1;

The system also includes a system host 5 installed indoors, the system host is provided with a power control main board with a controller, the controller on the power control main board and the frequency converter, dehumidifier and The air conditioner is connected, and the shell of the system host 5 is provided with a fresh air outlet 5.1 and a refrigeration dehumidification outlet 5.2, the frequency converter controls the fresh air fan, and the air outlet of the fresh air fan is facing the fresh air outlet 5.1, the air outlet of the dehumidifier and the air conditioner Facing the refrigeration and dehumidification outlet 5.2;

The system also includes an air inlet wall hole 6 arranged on the indoor wall, and the air inlet wall hole 6 is connected to the air inlet of the fresh air fan of the system host 5, thereby introducing outside air;

Further, the power control board of the system is also connected with an air conditioner remote controller, a temperature and humidity sensor, a smoke sensor, a water immersion alarm device, a fire alarm device, an external equipment failure alarm device and a mobile terminal, and the mobile terminal communicates with the user through the network. The cloud center is connected by communication, so that various internal and external information of the distribution station can be uploaded to the cloud center conveniently for background personnel, and the information can be transmitted to the corresponding person in charge of each distribution station in real time;

Further, the temperature and humidity sensor includes an indoor temperature and humidity sensor 101 installed on the indoor wall, an outdoor temperature and humidity sensor 102 installed on the wall of the air inlet wall hole 6, and an indoor temperature and humidity sensor 102 installed in the air duct of the cable trench fan 4. The temperature and humidity sensor 103 of the cable trench, so as to detect the temperature and humidity of each position;

When the outdoor air is in a state of high humidity (the fresh air fan of the system is stopped), if the indoor humidity is higher than the control requirement, the system can automatically start the dehumidifier and air conditioner to realize the dehumidification function through the controller on the power control board to ensure indoor humidity control within the set limits;

This system abandons the traditional heating and anti-condensation method in the cabinet, but reduces the dew point temperature of the air by effectively reducing the moisture content of the air in the cabinet. The humidity of the indoor air outside the cabinet is controlled, and the air pressure is in a positive pressure state (fresh air A fan pushes outside air into the room). The air in the cable trench is in a negative pressure state under the action of the cable trench negative pressure device, so that the air in the gap between the bottom of the switch cabinet and the cable trench can only flow from top to bottom (that is, from the inside of the switch cabinet to the cable trench), eliminating the need for cables The ditch humid air enters the switch cabinet; while the air in the cabinet only comes from the indoor air outside the cabinet, which reduces the moisture content of the air in the cabinet and ensures that the dew point temperature of the air in the cabinet is lower than the surface temperature of the equipment in the cabinet, so as to achieve The purpose of anti-condensation switch cabinet.

In addition: it should be noted that the above specific implementation is only an optimization solution of this patent, and any changes or improvements made by those skilled in the art based on the above ideas are within the scope of protection of this patent.

Claims (3)

1. it is a kind of for power distribution station high-tension switch cabinet in wet down anti-condensation system, it is characterised in that：The system includes It is installed on indoor switchgear（1）, which is provided with for switchgear（1）The cable duct of inner cable cabling（2）, and room Air draft wall hole is provided in interior walls（3）, the air draft wall hole（3）And cable duct（2）Between be provided with cable duct wind turbine（4）, should Cable duct wind turbine（4）Air intake be connected to cable duct（2）, cable duct wind turbine（4）Outlet air end be connected to air draft wall hole（3）；

The system, which also includes, is installed on indoor system host（5）, it is provided with controller in the system host Electric control mainboard, controller and system host on the Electric control mainboard（5）Interior frequency converter, dehumidifier are connected with air-conditioning It connects, and system host（5）Shell on be provided with fresh wind port（5.1）With refrigerated dehumidification air port（5.2）, Frequency Converter Control fresh air wind Machine, and the air outlet face fresh wind port of the fresh-air fan（5.1）, the air outlet face refrigerated dehumidification wind of the dehumidifier and air-conditioning Mouthful（5.2）；

The system also includes the air inlet wall hole being set on indoor wall（6）, the air inlet wall hole（6）It is connected to system host （5）Fresh-air fan air inlet, so as to import outside air.

2. as described in claim 1 it is a kind of for power distribution station high-tension switch cabinet in wet down anti-condensation system, it is characterised in that： Air-conditioning remote control, Temperature Humidity Sensor, smoke sensor device, water logging alarm dress are also associated on the Electric control mainboard of the system It puts, fire alarm installation, external device accident warning device and mobile terminal, the mobile terminal are led to by network and cloud center News are connected.

3. as claimed in claim 2 it is a kind of for power distribution station high-tension switch cabinet in wet down anti-condensation system, it is characterised in that： The Temperature Humidity Sensor includes the indoor temperature and humidity sensor being installed on indoor wall（101）, be installed on air inlet wall hole （6）Hole wall on outdoor temperature humidity sensor（102）And it is installed on cable duct wind turbine（4）Air duct in cable duct temperature Humidity sensor（103）.