CN110336188B - Moisture-proof dehumidification method for 10 kV box transformer substation - Google Patents
Moisture-proof dehumidification method for 10 kV box transformer substation Download PDFInfo
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- CN110336188B CN110336188B CN201910521365.1A CN201910521365A CN110336188B CN 110336188 B CN110336188 B CN 110336188B CN 201910521365 A CN201910521365 A CN 201910521365A CN 110336188 B CN110336188 B CN 110336188B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/24—Circuit arrangements for boards or switchyards
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/56—Cooling; Ventilation
- H02B1/565—Cooling; Ventilation for cabinets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Drying Of Gases (AREA)
- Air Conditioning Control Device (AREA)
Abstract
A moisture-proof dehumidification method for a 10 kV box transformer substation belongs to the moisture-proof dehumidification field of devices for power supply and distribution. A semiconductor dehumidification module is arranged in a box transformer substation cabinet body; temperature and humidity sensors are respectively arranged inside and outside the cabinet body; a drainage pipeline and an exhaust fan are arranged on the cabinet body; and the dehumidification module, the temperature and humidity sensor and the exhaust fan are connected with the local control terminal module. When the humidity in the cabinet body is higher than the humidity of external air and the humidity in the cabinet body is higher than a preset humidity upper limit value, starting an exhaust fan, and changing the air inside and outside through a quick exchange box to reduce the humidity of the air in the cabinet body; when the humidity in the cabinet body is higher than the preset humidity upper limit value, the dehumidifying module actively sucks the humid air in the closed space in the closed box-type cabinet body into the dehumidifying air channel, the water vapor in the air is cooled by the dehumidifying module and then condensed into water, the water is discharged out of the cabinet body through the water guide pipe, and the dehumidified dry air circulates in the cabinet. The damp-proof dehumidification function in the box transformer substation cabinet body is realized through the working modes of cooling, water draining and ventilating.
Description
Technical Field
The invention belongs to the fields of moisture prevention, dehumidification and monitoring of power supply and distribution devices, and particularly relates to a moisture prevention and dehumidification method for a 10 kV box transformer substation.
Background
In a low-voltage distribution network, a box-type substation or a box-type transformer (box transformer for short) is the most common terminal distribution mode, is generally installed outdoors, and is used as an intermediate link for high-low voltage conversion and electric energy distribution to residential users.
However, the box transformer and the switch cabinet are often sealed, the internal space is narrow, the box transformer and the switch cabinet are affected by rainy seasons and weather changes, humid air cannot be discharged in time, and condensation easily occurs inside the box transformer and the switch cabinet.
The insulating properties that the condensation attaches on components and parts or electrical connection point and can influence equipment and cause short circuit or earth fault easily, the corrosion of the metallic structure spare of equipment in the cabinet also can be accelerated to the condensation, reduces equipment operation reliability and mechanical strength, and the insulating properties of electric component also can greatly reduced causes accidents such as electric equipment creepage, flashover and tripping operation.
According to incomplete statistics, the faults of the electrical equipment caused by the external environment change factors account for 62% of the overall faults of the equipment, the defects of the design and devices account for 18%, the use and maintenance factors account for 11%, and other factors such as security and protection account for 9%, wherein the problem that the interior of the switch equipment is affected with damp is particularly prominent.
The general unmanned on duty of outdoor case becomes, when the trouble takes place, often have a plurality of intermediate links from discovery trouble to relevant personnel before overhauls and the power transmission between to bring bad influence for enterprise's production and resident's life. In addition, in the southeast coastal areas of Shanghai cities, the water vapor content in the air is high, the temperature difference between day and night is large, the condensation phenomenon is easy to occur, and the electric power safety of a low-voltage power distribution network is seriously threatened, so that a spectrum-dependent effective measure is urgently required to solve the condensation problem.
The application publication date is 2017, 8 and 11, and the application publication number is CN 107039892A in Chinese invention patent application, which discloses a method for preventing moisture and dehumidifying of a high-voltage switch system, and the method comprises the following steps: (1) cleaning the insulation position of a high-voltage switch cabinet of a high-voltage switch system by using acetone, smearing anti-pollution flashover coating on the insulation position, and simultaneously plugging a cable inlet by using fireproof mortar and plugging a joint by using glass cement; (2) respectively setting a starting temperature threshold value, a stopping temperature threshold value, a starting humidity threshold value and a stopping humidity threshold value on a control device; (3) the control device starts the high ventilation dehumidification device and the heating device; (4) the control device starts a ventilation and dehumidification device and at least one heating device in the high-voltage switch system; (5) heating the gas in the high-voltage switch cabinet by the heating device, simultaneously discharging the heated gas into the ventilation and dehumidification device, condensing the heated gas to obtain dry gas, and then conveying the dry gas into the high-voltage switch cabinet through the ventilation and dehumidification device; (6) and (5) repeating the step (5) until the temperature and/or the humidity detected by the temperature and humidity sensing device reach a stop threshold, and stopping the ventilation and dehumidification device and the heating device by the control device.
In the technical scheme, firstly, the insulating edge of a high-voltage switch cabinet of the high-voltage switch system is cleaned by acetone, which is generally difficult to implement for a box transformer substation with a compact structure unless the whole box transformer substation is disassembled; the box transformer is disassembled and then assembled, and the assembled assembly quality and electrical safety parameters are difficult to ensure in actual work; and secondly, a heating dehumidification mode is adopted, so that the method is not suitable for the high-temperature and humid environment in the south.
With the increasing popularity of the application of the box-type transformer, how to carry out a long-term, effective and stable dehumidification method on the box-type transformer is a problem which needs to be solved urgently in practical work.
Disclosure of Invention
The invention aims to provide a moisture-proof dehumidification method for a 10 kV box transformer substation. The temperature and humidity inside and outside the box transformer substation cabinet are respectively measured by arranging a plurality of temperature sensors, the air circulation inside the box transformer substation cabinet is accelerated by adopting a cooling-drainage-ventilation method, and a dehumidification module is controlled to automatically perform dehumidification work, so that the condition that condensation is generated inside the box transformer substation cabinet is eliminated, and the purpose of preventing condensation is achieved; meanwhile, a computer client or mobile phone App software is used as a control medium to realize the interaction and remote control of remote data.
The technical scheme of the invention is as follows: the damp-proof dehumidification method for the 10 kV box transformer substation comprises the steps of dehumidifying air in a cabinet body, and is characterized in that:
a dehumidification module and a corresponding temperature and humidity sensor are arranged in a closed box type cabinet body of the box transformer substation;
the dehumidification module is used for condensing and dehumidifying the humid air passing through the dehumidification air channel;
the temperature and humidity sensor is used for automatically detecting the humidity in the closed box type cabinet body;
at least one drainage pipeline is arranged on the closed box type cabinet body;
the drainage pipeline is used for draining condensed water generated by the dehumidification module out of the drainage cabinet body;
when the temperature and humidity sensor detects that the humidity in the cabinet body is higher than a preset humidity upper limit value, the dehumidification module is controlled to start dehumidifying;
the dehumidifying module actively sucks the humid air in the closed space in the closed box type cabinet body into the dehumidifying air channel, the water vapor in the air is cooled by the dehumidifying module and condensed into water, the water is discharged out of the cabinet body through the water guide pipe, and the dehumidified dry air circulates in the cabinet;
when the humidity in the cabinet body is lower than a preset humidity lower limit value, controlling the dehumidification module to stop working;
when the humidity in the cabinet body is higher than the preset lower limit value of the humidity but lower than the preset upper limit value of the humidity, the dehumidification module keeps the current working state.
Furthermore, a temperature and humidity sensor is respectively and simultaneously arranged inside and outside the closed box-type cabinet body, and an exhaust fan is arranged on the closed box-type cabinet body; simultaneously detecting and comparing the air humidity inside and outside the closed box type cabinet body in real time;
when the humidity inside the closed box type cabinet body is higher than the humidity of the air outside the closed box type cabinet body and the humidity inside the closed box type cabinet body is higher than a preset humidity upper limit value, starting the exhaust fan, and changing the air inside and outside through the quick exchange box to reduce the humidity of the air inside the cabinet body;
when the humidity inside the cabinet body is equal to or less than the humidity of the air outside the closed box-type cabinet body, the operation of the exhaust fan is stopped.
Specifically, the dehumidification module is a drain type dehumidifier; the exhaust fan is a centrifugal fan.
Specifically, the drainage type dehumidifier be semiconductor refrigeration formula dehumidifier, the condensation takes place near the refrigeration face of semiconductor refrigeration formula dehumidifier for the steam molecule in the air meets the low temperature, adheres to on the metal block surface of refrigeration face, after the hydrone gathers into the dribble, because self gravity, along the metal block surface gliding drip into the water collector, be connected with water drainage pipe through the soft pipe of water collector, the derivation case becomes outward.
Furthermore, the dehumidification module, the corresponding temperature and humidity sensor and the exhaust fan are connected with a local control terminal module; the local control terminal module is connected with the remote server through a GPRS communication module.
Furthermore, the local control terminal module control terminal changes the humid environment inside the box transformer substation by collecting data of the temperature sensor and the humidity sensor inside and outside the box transformer substation, analyzing and processing the data through the control terminal processor and starting the drainage type dehumidifier and the exhaust fan.
Specifically, the on-site control terminal module pass through the inside and outside humiture data of GPRS module with the case becomes, dehumidifier, exhaust fan running state upload and give background server, realize the inside long-range real time monitoring of box and show at computer terminal and cell-phone APP terminal.
Furthermore, the moisture-proof dehumidification method can remotely monitor the working states of the drainage type dehumidifier and the centrifugal exhaust fan at the computer terminal and the mobile phone APP terminal, and can remotely control the running start or stop of the drainage type dehumidifier and the centrifugal exhaust fan.
Compared with the prior art, the invention has the advantages that:
1. an integrated dehumidification system is adopted, so that the moisture-proof and dehumidification problems of the box transformer substation are solved;
2. through setting up GPRS module and backstage server structure, realized the inside long-range real time monitoring of box and at computer terminal and cell-phone APP terminal demonstration to can the operation start-up or the stop of remote control drainage type dehumidifier and centrifugal exhaust fan.
3. Through the mode of operation of cooling-drainage-ventilation, adopt drainage type semiconductor refrigeration dehydrating unit to minimum occupation space improves the inside moist environment of case transformer substation through dehumidification and cooling two aspects, and cooperation remote server becomes inside to the case and carries out real time monitoring, has realized the internal dampproofing dehumidification function of case transformer substation cabinet, has played very big effect to the trouble that reduces the case transformer substation, has ensured the safety and stability operation that the case transformer substation, has prolonged the life that the case transformer substation.
Drawings
FIG. 1 is a block diagram of the control flow of the present invention;
FIG. 2 is a schematic diagram of the system topology of the present invention;
fig. 3 is a schematic diagram of a hardware circuit structure of the control terminal of the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
In fig. 1 and fig. 2, the technical solution of the present invention provides a moisture-proof dehumidification method for a 10 kv box transformer substation, which includes dehumidifying air in a cabinet body, and the invention lies in that:
a dehumidification module is arranged in a closed box type cabinet body of the box type transformer substation;
temperature and humidity sensors are respectively and correspondingly arranged inside and outside a closed box type cabinet body of the box transformer substation;
at least one drainage pipeline is arranged on the closed box type cabinet body;
an exhaust fan is arranged on the closed box type cabinet body;
the dehumidification module, the corresponding temperature and humidity sensor and the exhaust fan are connected with a local control terminal module;
the local control terminal module is connected with the remote server through a GPRS communication module.
The dehumidification module is used for condensing and dehumidifying the humid air passing through the dehumidification air channel;
the temperature and humidity sensor is used for automatically detecting the ambient humidity inside and outside the closed box type cabinet body;
the drainage pipeline is used for draining condensed water generated by the dehumidification module out of the drainage cabinet body;
the dehumidification module is used for actively sucking moist air in a closed space in the closed box type cabinet body into the dehumidification air channel, water vapor in the air is cooled by the dehumidification module and condensed into water, the water is discharged out of the cabinet body through the water guide pipe, and the dehumidified dry air circulates in the cabinet;
when the humidity in the cabinet is higher than a preset humidity upper limit value, controlling the dehumidification module to start working;
when the humidity in the cabinet is lower than a preset humidity lower limit value, controlling the dehumidification module to stop working;
when the humidity in the cabinet is higher than the preset lower limit value of the humidity but lower than the preset upper limit value of the humidity, the dehumidification module keeps the current working state.
When the humidity inside the closed box type cabinet body is higher than the humidity of the air outside the closed box type cabinet body and the humidity inside the closed box type cabinet body is higher than a preset humidity upper limit value, starting the exhaust fan, and changing the air inside and outside through the quick exchange box to reduce the humidity of the air inside the cabinet body;
when the humidity inside the cabinet body is equal to or less than the humidity of the air outside the closed box-type cabinet body, the operation of the exhaust fan is stopped.
Specifically, the dehumidification module is a drain type dehumidifier; the exhaust fan is a centrifugal fan.
Specifically, the drainage type dehumidifier be semiconductor refrigeration formula dehumidifier, the condensation takes place near the refrigeration face of semiconductor refrigeration formula dehumidifier for the steam molecule in the air meets the low temperature, adheres to on the metal block surface of refrigeration face, after the hydrone gathers into the dribble, because self gravity, along the metal block surface gliding drip into the water collector, be connected with water drainage pipe through the soft pipe of water collector, the derivation case becomes outward.
Furthermore, the local control terminal module control terminal changes the humid environment inside the box transformer substation by collecting data of the temperature sensor and the humidity sensor inside and outside the box transformer substation, analyzing and processing the data through the control terminal processor and starting the drainage type dehumidifier and the exhaust fan.
Specifically, the in-situ control terminal module (control terminal for short) upload the inside and outside humiture data of case change, dehumidifier, exhaust fan running state to the backend server through the GPRS module, realize the inside long-range real time monitoring of box and show at computer terminal and cell-phone APP terminal.
Furthermore, the moisture-proof dehumidification method can remotely monitor the working states of the drainage type dehumidifier and the centrifugal exhaust fan at the computer terminal and the mobile phone APP terminal, and can remotely control the running start or stop of the drainage type dehumidifier and the centrifugal exhaust fan.
Specifically, the control acquisition unit of the present invention adopts a multitask closed-loop working mode, and a program block diagram thereof is shown in fig. 1.
The system hardware topology of the present invention is shown in fig. 2.
Since the drawings in fig. 1 and 2 are both customary in the industry and their meanings are completely understood by those skilled in the art without any doubt, the detailed working steps and the specific connections between hardware will not be described in detail here.
In fig. 3, the main functions of the control terminal include temperature and humidity measurement, condensation point determination and calculation, setting of a working mode, indication and alarm, dehumidification control, heating and ventilation control, and receiving instructions of the monitoring control platform and sending own state and data through the communication management module. According to the function requirement systems, an ARM single chip microcomputer is selected as a control core of the control terminal to meet the requirements of operation, storage, I/O interfaces and communication, and each control terminal in the ring main unit is provided with a unique address code and cabinet body information corresponding to the address code and can independently perform remote information interaction with the monitoring management platform.
As shown in the figure, the control terminal can change the humid environment inside the box transformer substation by collecting the data of the temperature sensor and the humidity sensor inside and outside the box transformer substation, analyzing and processing the data by the control terminal processor and starting the drainage type dehumidifier and the centrifugal fan. And can also pass through GPRS communication module, with the data and the drainage type dehumidifier that temperature sensor, humidity transducer gathered, centrifugal fan open and stop state, operating time etc. upload background server, show at computer terminal and cell-phone APP terminal to can remote control drainage type dehumidifier and centrifugal fan's operating condition.
The integrated dehumidification system is installed on 20 box transformers such as an XX power supply box transformer substation in an XX region of Shanghai city, a Zhenhua XX box transformer substation with No. 9, an XX path box transformer substation with No. 1, a box transformer substation with No. 2 and the like, so that the automatic start and stop of a fan and a dehumidification device of the box transformer substation are realized, the change conditions of the temperature and humidity inside and outside the box transformer substation can be remotely observed, and the start and stop of the fan and the dehumidifier can be remotely controlled. In 6 months of integrated operation of dehumidification, no condensation and equipment corrosion phenomena are found through on-site inspection, and the dehumidification target of the box transformer substation is achieved.
The invention adopts the working mode of cooling-water draining-ventilating and adopts the water draining type semiconductor refrigeration and dehumidification device, thereby improving the humid environment inside the box transformer substation through two aspects of dehumidification and temperature reduction with the minimum occupied space, matching with the remote server to carry out real-time monitoring on the inside of the box transformer substation, realizing the moisture-proof and dehumidification functions in the box transformer substation cabinet body, playing a great role in reducing the faults of the box transformer substation, ensuring the safe and stable operation of the box transformer substation and prolonging the service life of the box transformer substation.
The invention can be widely applied to the field of moisture prevention and dehumidification of the box-type transformer substation or the box-type transformer.
Claims (3)
1. A damp-proof dehumidification method for a 10 kV box transformer substation comprises the steps that a dehumidification air duct is arranged in a closed box type cabinet body of the box transformer substation; a dehumidification module is arranged in the dehumidification air duct; a corresponding temperature and humidity sensor is arranged in the closed box type cabinet body; the dehumidification module is used for condensing and dehumidifying the humid air passing through the dehumidification air channel; the temperature and humidity sensor is used for automatically detecting the environmental humidity in the closed box type cabinet body; at least one drainage pipeline is arranged on the closed box type cabinet body; the condensed water draining device is used for draining the condensed water generated by the dehumidifying module out of the draining cabinet body; the method is characterized in that:
the inside and the outside of the closed box type cabinet body are respectively and simultaneously provided with a temperature and humidity sensor which is used for simultaneously detecting and comparing the air humidity inside and outside the closed box type cabinet body in real time;
an exhaust fan is arranged on the closed box type cabinet body and used for rapidly exchanging air inside and outside the box type cabinet body and reducing the humidity of the air inside the cabinet body;
the dehumidification module, the corresponding temperature and humidity sensor and the exhaust fan are connected with a local control terminal module;
the local control terminal module is connected with the remote server through a GPRS communication module;
when the temperature and humidity sensor detects that the humidity in the cabinet body is higher than a preset humidity upper limit value, the dehumidification module is controlled to start dehumidifying;
the dehumidifying module actively sucks the humid air in the closed space in the closed box type cabinet body into the dehumidifying air channel, the water vapor in the air is cooled by the dehumidifying module and condensed into water, the water is discharged out of the cabinet body through the water guide pipe, and the dehumidified dry air circulates in the cabinet;
when the humidity in the cabinet body is lower than a preset humidity lower limit value, controlling the dehumidification module to stop working;
when the humidity in the cabinet body is higher than the preset lower limit value of the humidity but lower than the preset upper limit value of the humidity, the dehumidification module keeps the current working state;
when the humidity inside the closed box type cabinet body is higher than the humidity of the air outside the closed box type cabinet body and the humidity inside the closed box type cabinet body is higher than a preset humidity upper limit value, starting the exhaust fan, and changing the air inside and outside through the quick exchange box to reduce the humidity of the air inside the cabinet body;
when the humidity inside the cabinet body is equal to or less than the humidity of the air outside the closed box-type cabinet body, the operation of the exhaust fan is stopped;
the local control terminal module control terminal collects data of an internal temperature sensor and an external temperature sensor and a humidity sensor of the box transformer substation, analyzes and processes the data through a control terminal processor, and changes the humid environment inside the box transformer substation by starting a drainage type dehumidifier and an exhaust fan;
the local control terminal module uploads the internal and external temperature and humidity data of the box transformer substation, the running states of a dehumidifier and an exhaust fan to a background server through a GPRS module, so that remote real-time monitoring of the interior of the box body and display of the data at a computer terminal and a mobile phone APP terminal are realized;
according to the moisture-proof dehumidification method for the 10 kV box transformer substation, the working states of the dehumidifier and the exhaust fan can be remotely monitored on the computer terminal and the mobile phone APP terminal, and the operation start or stop of the dehumidifier and the exhaust fan can be remotely controlled;
the 10 kV box transformer substation moisture-proof dehumidification method adopts a cooling-drainage-ventilation method to accelerate air circulation in a box transformer substation cabinet body and control a dehumidification module to automatically perform dehumidification, so that the condition that condensation is generated in the box transformer substation cabinet body is eliminated, and the purpose of preventing condensation is achieved.
2. The moisture-proof and dehumidifying method for a 10 kv box transformer substation as claimed in claim 1, wherein the dehumidifying module is a drain type dehumidifier; the exhaust fan is a centrifugal fan.
3. The moisture-proof and dehumidifying method for a 10 kv box transformer as claimed in claim 2, wherein the water discharging type dehumidifier is a semiconductor refrigerating type dehumidifier, molecules of water vapor in the air are condensed when encountering low temperature near a refrigerating surface of the semiconductor refrigerating type dehumidifier and attached to a surface of a metal block of the refrigerating surface, when the water molecules are gathered into small water drops, the water drops slide down along the surface of the metal block and drop into the water receiving tray due to self gravity, and the water drops are connected with the water discharging pipeline through a flexible conduit of the water receiving tray to be led out of the box transformer.
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| CN110793571A (en) * | 2019-10-22 | 2020-02-14 | 云南恒协科技有限公司 | Ring main unit online monitoring system |
| CN110829191A (en) * | 2019-10-28 | 2020-02-21 | 广东盈丰源机电设备有限公司 | Power distribution system with dehumidifier |
| CN111129963A (en) * | 2019-12-26 | 2020-05-08 | 深圳供电局有限公司 | Distribution box control device and method and distribution box system |
| CN111770655A (en) * | 2020-07-14 | 2020-10-13 | 国网冀北电力有限公司技能培训中心 | Be provided with dampproof device's electric power communication cabinet |
| CN116437599A (en) * | 2023-03-13 | 2023-07-14 | 西安铁路信号有限责任公司 | Fireproof and explosion-proof box dehumidifying, dewatering and condensation preventing device and method |
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| CN110336188A (en) | 2019-10-15 |
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