CN106410635A - Method for monitoring temperature of static contact of power switch cabinet - Google Patents

Abstract

The invention discloses a method for monitoring temperature of a static contact of a power switch cabinet. The switch cabinet, a noise monitoring module and an electromagnetic radiation monitoring module which are uniformly distributed in a control room, a data transmission unit, a control center unit and a terminal display unit are used in the method. The switch cabinet comprises a cabinet body and a sealing door; a cavity is formed inside the sealing door; threaded holes in communication with the cavity are uniformly formed in the inner surface of the sealing door; a jetting mechanism or a hole cover is arranged on the threaded holes; the cavity is connected with an air supply mechanism; an exhaust mechanism is arranged above the cabinet body; and a temperature monitoring module and a smoke monitoring module are arranged in the cabinet body. According to the method, the sealed switch cabinet is used to shield inside electromagnetic radiation and noise, a map and a monitored noise and radiation condition in the control room are combined to remind field personnel and to remind the field personnel of maintenance in real time, so that harm to the field personnel, caused by the electromagnetic radiation and the noise, is reduced, and real-time cooling of the power switch cabinet static contact is realized.

Description

A method for monitoring the temperature of a static contact of a power switch cabinet

technical field

The invention relates to the technical field of electromagnetic field of a power switch cabinet, in particular to a method for monitoring the temperature of a static contact of a power switch cabinet.

Background technique

With the upgrading of power equipment, most of the power plants and substations currently adopt the power transmission method of switchgear. Since the switchgear cannot be opened during operation, it is impossible to measure the actual temperature and temperature of the high-voltage static contacts in the operating switchgear. current information. The switchgear operates in a complex environment for a long time, and its internal high-voltage static contacts are easy to loosen and oxidize. In the case of overload operation and poor installation, the contact surface resistance will gradually increase. When the load current flows, the high-voltage static contact The temperature of the contacts will rise or even burn out, resulting in large-scale power outages and great potential safety hazards. Therefore, it is extremely important to monitor the cooling and current information of the high-voltage static contacts in the switch cabinet in real time. However, the existing high-voltage static contact temperature measuring devices have problems such as complex operation, poor safety, inaccurate and fast measurement, inability to obtain measurement data in real time, single measurement types, and can only be used to measure temperature information.

In order to solve the problems existing in the prior art, people have carried out long-term exploration and proposed various solutions. For example, the Chinese patent literature discloses a high-voltage switch contact temperature measuring device [Application No.: 201220002375.8], which includes a current transformer set on the arm of the high-voltage switch static contact. There is a wireless transmitter module powered by a device, and a temperature measurement hole is provided on the support arm. A temperature sensor electrically connected to the input end of the wireless transmitter module is inserted in the temperature measurement hole, and a wireless receiver module that can receive signals from the wireless transmitter module is also included. The output end of the wireless receiving module is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with a display screen.

The above-mentioned scheme solves the problem of complex operation and poor safety of the existing high-voltage switch contact temperature measuring device to a certain extent, so that it can quickly obtain measurement information, but the scheme still exists: complex structure, low measurement accuracy, measurement The type is single and can only be used to measure temperature information.

The electrical switchgear is responsible for receiving and controlling the electrical information of each device in the substation, but most of the electrical switchgears are collectively placed in the control room, and the noise and electromagnetic radiation are very large. With the development of my country's electric power industry and the improvement of people's awareness of environmental protection, How to reduce or even eliminate the noise pollution and electromagnetic pollution of electrical switchgear has become a new topic. At present, the control of noise and electromagnetic radiation in electrical switchgear mainly depends on adding shielding devices. The shielding device is generally made of special materials, which can absorb a certain frequency spectrum or a certain frequency band of spectral noise, so as to achieve the purpose of reducing the noise emitted by the entire device. However, some noise shielding devices have their own defects, such as: 1. The absorbed noise spectrum range is narrow, resulting in insignificant shielding effect; 2. It affects the ventilation and heat dissipation of the switchgear device, and there is no way to control the electromagnetic radiation to reduce the harm to the staff. Therefore, the switchgear can only be placed in a radiation-isolated room and non-workers are prohibited from approaching, but for those who need to enter the work, electromagnetic damage continues all the time.

The current electromagnetic radiation shielding and noise reduction mostly use thin paint to brush the surface of the electric control cabinet and design a noise radiation shielding structure on the wall of the electric control room. The shielding effect of the former is not ideal, and the latter has no protection for the indoor staff. Long-term exposure to electromagnetic noise is very harmful to the body. However, using thicker wave-absorbing materials or sealed cabinets for radiation shielding of the electric control cabinet is extremely unfavorable for its heat dissipation, and it is easy to damage the equipment. Moreover, in the prior art, the intensity of electromagnetic radiation is not monitored in the control room, and the staff cannot be given reference information, and the electromagnetic radiation situation in the control room cannot be grasped. The environment is extremely unfavorable to the body.

The invention with application number 201410490514.X discloses an electromagnetic shielding room. The electromagnetic shielding room includes: a shielding shell; the inside of the shielding shell forms a closed electromagnetic shielding space, and its wall surface includes: a permalloy shielding interlayer, a support layer, an aluminum plate shielding interlayer, a permalloy shielding The interlayer and the aluminum plate shielding interlayer are respectively fixed on the inside and outside of the support layer. The invention not only uses permalloy to shield low-frequency magnetic fields, but also uses aluminum plates to shield high-frequency electromagnetic fields, thereby improving the effect of high-frequency shielding. But this invention can't carry out electromagnetic shielding to each electric switchgear, can't guarantee the health of indoor staff.

The invention with the application number 201510820315.5 discloses a noise and electromagnetic radiation monitoring and shielding device for electrical switchgear of a communication base station, which includes a switchgear and a casing. A wave-absorbing material plate, a temperature and humidity monitoring module is installed on the inner surface of the housing, a noise monitoring module and an electromagnetic radiation monitoring module are installed on the outer surface of the housing, and a temperature control module is installed inside the housing. The present invention uses wedge-shaped wave-absorbing material boards to shield radiation, and the radiation-absorbing effect is far greater than the radiation-proof coatings in the prior art; foam aluminum boards are used to absorb noise, and further reduce radiation energy, which can reduce the operating time of equipment Eliminate noise as much as possible; monitor the temperature and humidity in the switchgear and install a temperature and humidity adjustment module to avoid the inconvenience of heat dissipation in the switchgear caused by the thicker shell, improve the safety of equipment operation, and prolong the service life of the equipment. This invention does not establish a complete electromagnetic environment monitoring system, and the temperature control effect on the electrical switchgear is poor, the energy consumption is large, and it is not intelligent.

Contents of the invention

The problem to be solved by the present invention is to provide a method for monitoring the temperature of the static contacts of the electric switchgear. The sealed switchgear is used to shield the internal electromagnetic radiation and noise, so as to reduce the influence on the control room, and the map in the control room and the monitoring Combined with noise and radiation conditions, it can remind the on-site personnel and can cool down the static contacts of the switch cabinet in real time.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A static contact temperature monitoring system for a power switchgear, comprising a switchgear, a noise monitoring module and an electromagnetic radiation monitoring module uniformly arranged in a control room, a data transmission unit, a control center unit, and a terminal display unit, the switchgear includes a cabinet body and a sealed door, the inside of the sealed door is provided with a cavity, the cabinet body is a double-layer structure, the inner surface of the sealed door is uniformly provided with threaded holes communicating with the cavity, and the threaded holes are provided with an air injection mechanism or Hole cover, the cavity is connected to the air supply mechanism, an exhaust mechanism is arranged above the cabinet, a temperature monitoring module and a smoke monitoring module are arranged in the cabinet, and the air supply mechanism is connected to the temperature monitoring module and the smoke monitoring module. The modules are connected, the noise monitoring module, the electromagnetic radiation monitoring module and the air supply mechanism are connected to the control center unit through the data transmission unit, the control center unit is connected to the terminal display unit, and the switch cabinet is equipped with An infrared thermometer for detecting the static contact of the switch cabinet. The infrared thermometer is connected to a programmable controller. The two sides of the switch cabinet are respectively provided with a main semiconductor cooling piece and a secondary semiconductor cooling piece. The main semiconductor cooling piece Both the sub-semiconductor refrigerating sheet are connected with the programmable controller.

The hot surface of the main semiconductor heat sink is provided with a main radiator, the hot surface of the secondary semiconductor cooling sheet is provided with a secondary radiator, the primary radiator is provided with a main temperature sensor, and the secondary radiator is provided with a secondary temperature sensor. sensor, the main temperature sensor and the secondary temperature sensor are connected with the programmable controller.

Heat-conducting silica gel is arranged between the main semiconductor cooling sheet and the auxiliary semiconductor cooling sheet and the switch cabinet.

Both the main radiator and the secondary radiator are connected with the switch cabinet through an elastic mechanism.

The elastic mechanism is a tower spring arranged on the main radiator and a screw threaded through the tower spring and connected to the switch cabinet.

Both the main radiator and the secondary radiator are hollow structures, and both the primary radiator and the secondary radiator are filled with cooling liquid.

Further, the noise monitoring module adopts a noise monitor, and the electromagnetic radiation monitoring module includes an electromagnetic radiation detector.

Further, the temperature monitoring module uses an infrared temperature sensor, and the smoke monitoring module uses a smoke sensor.

Further, the temperature monitoring module is correspondingly arranged on the air injection mechanism, and the smoke monitoring module is arranged on the top of the cabinet.

Further, the gas supply mechanism includes an air supply module, an inert gas supply module and a controller connected thereto, the air supply module and the inert gas supply module are connected to the cavity through a solenoid valve, and the solenoid valve is connected to the The controller is connected.

Further, an insulating layer is provided on the inner surface of the cavity.

Further, the air supply module includes a filter screen, an air pump, and a cooling cavity connected in sequence, and a cooling module is arranged in the cooling cavity.

Further, the inert gas supply module includes a gas storage tank storing inert gas.

Further, the air injection mechanism includes an air injection pipe movably arranged on the threaded hole, a semicircular spray head is arranged on the top of the air injection pipe, and an air injection hole is arranged on the spray head.

Further, the exhaust mechanism includes an exhaust port and an exhaust duct, and the exhaust port is provided with barbed wire.

Further, the data transmission unit includes a fiber optic transceiver and an optical fiber, and the control center unit includes a monitoring host connected to a GIS module.

Further, the GIS module provides the position distribution map of the electrical switch cabinet in the control room, and combines the received electromagnetic radiation information and noise information with the position distribution map of the electrical switch cabinet to form a follow-up environmental information map. The host computer sends the environmental information map to the terminal display unit to remind the on-site staff of the environmental information.

Further, the terminal display unit adopts a display screen or a portable communication terminal set in the control room.

A method for monitoring the temperature of a static contact of a power switch cabinet, comprising the following steps:

1) When the switchgear is started, the programmable controller controls the work of the main semiconductor cooling chip, and the main semiconductor cooling chip cools down the temperature of the switch cabinet;

2) When the temperature of the main radiator on the side of the main semiconductor cooling chip exceeds the set high value, the programmable controller disconnects the power supply of the main semiconductor cooling chip, and at the same time the programmable controller controls the operation of the secondary semiconductor cooling chip, and the secondary semiconductor cooling chip is supplied to the switch cabinet cool down;

3) When the auxiliary semiconductor cooler is working, the main semiconductor cooler is not working, and the temperature of the main radiator is gradually decreasing. When the temperature of the auxiliary radiator on the side of the auxiliary semiconductor cooler exceeds the set value, the programmable controller disconnects the auxiliary radiator. Semiconductor cooling chip power supply, at the same time, the programmable controller controls the work of the main semiconductor cooling chip, and the main semiconductor cooling chip cools down the temperature of the switch cabinet.

The invention provides a method for monitoring the temperature of the static contacts of the electric switchgear. The switchgear is arranged in the control room. In order to shield the electromagnetic radiation of the noise mechanism of the electric switchgear, the switchgear itself needs to have the function of electromagnetic shielding. Therefore, the switchgear includes The cabinet body and the airtight door are both made of electromagnetic shielding boards. There is a cavity inside the airtight door and the cabinet body is a double-layer structure. When the airtight door is closed, the noise and electromagnetic waves in the cabinet will be Radiation is isolated. The switchgear is not filled with electrical equipment, and there are not many equipment with severe heat generation, and they are scattered in the switchgear, and the uniformly arranged threaded holes correspond to these devices. Hole cover, the cover hole acts as a blockage. This structure can ensure that the cold air contacts the heating electrical equipment when it enters the switch cabinet, which greatly enhances the cooling effect. Compared with the traditional cabinet full of air-conditioning, the demand for air-conditioning Reduce the use of electric energy, and the exhaust mechanism above the cabinet exhausts the excess gas in the switch cabinet to facilitate the entry of cold air.

The cavity inside the airtight door is connected to the air supply mechanism, which receives information from the temperature monitoring module and the smoke monitoring module, and supplies cold air to cool down the equipment in the cabinet when the temperature rises, and when the temperature is within the normal value It is enough to ventilate through the outside air. When the temperature inside the cabinet is high and burning smoke is detected, the gas supply mechanism provides inert gas that can extinguish the fire, such as carbon dioxide, nitrogen, etc., so that the fire extinguishing function is realized because of the tightness of the cabinet. . On the other hand, the noise monitoring module, the electromagnetic radiation monitoring module and the air supply mechanism are connected to the control center unit. The control center can monitor the indoor noise, electromagnetic radiation, temperature in the switch cabinet, and whether there is a fire, and can complete unified deployment, and will Noise and electromagnetic radiation information is sent to the terminal display unit, so that the on-site staff can grasp the situation of radiation and noise pollution. When the radiation exceeds the standard, the area where the radiation exceeds the standard can be bypassed, and the personnel are notified for maintenance, which greatly reduces the impact of electromagnetic radiation and noise on the on-site staff. damage caused.

The beneficial effects of the present invention are:

1. Use sealed switchgear to shield the internal electromagnetic radiation and noise, reduce the impact on the control room, and combine the map in the control room with the monitored noise and radiation conditions to remind the on-site personnel and bypass the radiation intensity Larger areas, and timely reminders for maintenance, greatly reducing the damage caused by electromagnetic radiation and noise to on-site staff;

2. The sealed switch cabinet adopts a special cooling method, which can not only ensure a good cooling effect, but also ensure less power consumption, and is particularly practical;

3. The cooling mechanism can be fed with one of ordinary air, cold air and inert gas, and can be used according to different situations. It has a wider scope of application and more powerful functions.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing:

Fig. 1 is the structural representation of switchgear of the present invention;

Fig. 2 is a system structure diagram of the static contact temperature monitoring method of the electric switch cabinet of the present invention;

Fig. 3 is a structural schematic diagram of the air supply mechanism of the present invention.

detailed description

Below in conjunction with Fig. 1 to Fig. 3, the technical solution of the present invention is further shown, and the specific implementation is as follows:

Embodiment one

As shown in Figures 1 and 2: this embodiment provides a method for monitoring the temperature of the static contacts of a power switch cabinet, including a noise monitoring module 6 and an electromagnetic radiation monitoring module 7 uniformly arranged in a switch cabinet, a control room, and a data transmission unit 5. The control center unit 3 and the terminal display unit 1. The switch cabinet includes a cabinet body 11 and a sealed door 12. A cavity 14 is provided inside the sealed door 12. The cabinet body 11 is a double-layer structure. The sealed door The inner surface of 12 is uniformly provided with threaded holes 15 communicating with the cavity 14, an air injection mechanism or a hole cover 16 is arranged on the threaded holes 15, the cavity 14 is connected with the air supply mechanism 8, and the top of the cabinet body 11 An exhaust mechanism is set, a temperature monitoring module 9 and a smoke monitoring module 10 are set in the cabinet 11, the air supply mechanism 8 is connected to the temperature monitoring module 9 and the smoke monitoring module 10, the noise monitoring module 6, the electromagnetic The radiation monitoring module 7 and the gas supply mechanism 8 are connected to the control center unit 3 through the data transmission unit 5, and the control center unit 3 is connected to the terminal display unit 1. The infrared thermometer of the contact 30, the infrared thermometer 31 is connected with a programmable controller 33, and the two sides of the switch cabinet are respectively provided with a main semiconductor cooling sheet 36 and a secondary semiconductor cooling sheet 32, and the main semiconductor cooling sheet Both the sheet 36 and the auxiliary semiconductor cooling sheet 32 are connected with the programmable controller 33 .

The thermal surface of the main semiconductor heat sink is provided with a main radiator 37, and the thermal surface of the secondary semiconductor cooling fin is provided with a secondary radiator 38. The primary radiator is provided with a main temperature sensor 40, and the secondary radiator is provided with a main temperature sensor. There is an auxiliary temperature sensor 39, and both the main temperature sensor and the auxiliary temperature sensor are connected with the programmable controller.

A method for monitoring the temperature of a static contact of a power switch cabinet, comprising the following steps:

1) When the switchgear is started, the programmable controller controls the work of the main semiconductor cooling chip, and the main semiconductor cooling chip cools down the temperature of the switch cabinet;

2) When the temperature of the main radiator on the side of the main semiconductor cooling chip exceeds the set high value, the programmable controller disconnects the power supply of the main semiconductor cooling chip, and at the same time the programmable controller controls the operation of the secondary semiconductor cooling chip, and the secondary semiconductor cooling chip is supplied to the switch cabinet cool down;

3) When the auxiliary semiconductor cooler is working, the main semiconductor cooler is not working, and the temperature of the main radiator is gradually decreasing. When the temperature of the auxiliary radiator on the side of the auxiliary semiconductor cooler exceeds the set value, the programmable controller disconnects the auxiliary radiator. Semiconductor cooling chip power supply, at the same time, the programmable controller controls the work of the main semiconductor cooling chip, and the main semiconductor cooling chip cools down the temperature of the switch cabinet.

Heat-conducting silica gel is arranged between the main semiconductor cooling sheet and the auxiliary semiconductor cooling sheet and the switch cabinet.

Both the main radiator and the secondary radiator are connected with the switch cabinet through an elastic mechanism.

The elastic mechanism is a tower spring arranged on the main radiator and a screw threaded through the tower spring 34 and connected to the switch cabinet 35 .

Both the main radiator and the secondary radiator are hollow structures, and both the primary radiator and the secondary radiator are filled with cooling liquid.

The switchgear is installed in the control room. In order to shield the electromagnetic radiation of the noise mechanism of the electrical switchgear, the switchgear itself needs to have the function of electromagnetic shielding. Therefore, the switchgear includes a cabinet body and a sealed door, and both the cabinet body and the sealed door use electromagnetic shielding plates. It is made, there is a cavity inside the airtight door and the cabinet body is a double-layer structure, when the airtight door is closed, the noise and electromagnetic radiation in the cabinet will be isolated. The switchgear is not filled with electrical equipment, and there are not many equipment with severe heat generation, and they are scattered in the switchgear, and the uniformly arranged threaded holes correspond to these devices. Hole cover, the cover hole acts as a blockage. This structure can ensure that the cold air contacts the heating electrical equipment when it enters the switch cabinet, which greatly enhances the cooling effect. Compared with the traditional cabinet full of air-conditioning, the demand for air-conditioning Reduce the use of electric energy, and the exhaust mechanism above the cabinet exhausts the excess gas in the switch cabinet to facilitate the entry of cold air.

The cavity inside the airtight door is connected to the air supply mechanism, which receives information from the temperature monitoring module and the smoke monitoring module, and supplies cold air to cool down the equipment in the cabinet when the temperature rises, and when the temperature is within the normal value It is enough to ventilate through the outside air. When the temperature inside the cabinet is high and burning smoke is detected, the gas supply mechanism provides inert gas that can extinguish the fire, such as carbon dioxide, nitrogen, etc., so that the fire extinguishing function is realized because of the tightness of the cabinet. . On the other hand, the noise monitoring module, the electromagnetic radiation monitoring module and the air supply mechanism are connected to the control center unit. The control center can monitor the indoor noise, electromagnetic radiation, temperature in the switch cabinet, and whether there is a fire, and can complete unified deployment, and will Noise and electromagnetic radiation information is sent to the terminal display unit, so that the on-site staff can grasp the situation of radiation and noise pollution. When the radiation exceeds the standard, the area where the radiation exceeds the standard can be bypassed, and the personnel are notified for maintenance, which greatly reduces the impact of electromagnetic radiation and noise on the on-site staff. damage caused.

When in use, the shielding mechanism composed of the sealed door and the cabinet shields the internal electromagnetic radiation and noise. The noise monitoring module and the electromagnetic radiation monitoring module in the shielding room monitor the electromagnetic environment in the room and send the monitoring information to the control center unit. , and finally displayed on the terminal display unit. The air supply mechanism supplies air to the cavity, which can provide ordinary air, low-temperature gas, and inert gas to realize the functions of ventilation, cooling and even fire extinguishing. The control center unit can also receive temperature and smoke information, and can quickly act when something happens. respond.

The noise monitoring module 6 adopts a noise monitor, and the electromagnetic radiation monitoring module 7 includes an electromagnetic radiation detector. The electromagnetic radiation detector has a built-in high-precision electric/magnetic field composite sensor with high sensitivity, fast response, and fully compensated frequency response, providing The most accurate measurement results can measure the radiation intensity in the control room, monitor whether the radiation is within a safe range, and send the value to the control center unit. The noise monitor adopts BR-ZS noise monitor, built-in high-sensitivity sensor and data acquisition module, so that the on-site noise signal can be output at 4~20mA/RS232 standard without distortion, and can be directly connected with the control center unit to feed back the monitoring information, and the operation is more convenient. convenient.

The temperature monitoring module 9 adopts an infrared temperature sensor, and the smoke monitoring module 10 adopts a smoke sensor, and the infrared temperature sensor is a non-contact temperature measuring element, which can accurately monitor the temperature in the area and is less affected by the environment. The smoke sensor uses an ion-type smoke sensor inside, which can monitor the concentration of smoke, and cooperate with the infrared temperature sensor to monitor whether a fire has occurred, and the judgment accuracy is higher.

The temperature monitoring module 9 is correspondingly arranged on the air injection mechanism, the smoke monitoring module 10 is arranged on the top of the cabinet body 11, the temperature monitoring module is set corresponding to the air injection mechanism, and the monitoring accuracy is higher. The solenoid valve can be opened when the temperature of the corresponding point is detected to be too high, which makes the use of air-conditioning more reasonable and saves energy. The smoke monitoring module is set on the top of the cabinet, because the smoke rises after a fire, which is easier to detect and more sensitive in response.

Embodiment two

As shown in Figures 1 to 3: this embodiment provides a method for monitoring the temperature of the static contacts of a power switchgear, including a switchgear, a noise monitoring module 6 and an electromagnetic radiation monitoring module 7 uniformly arranged in a control room, and a data transmission unit 5. The control center unit 3 and the terminal display unit 1. The switch cabinet includes a cabinet body 11 and a sealed door 12. A cavity 14 is provided inside the sealed door 12. The cabinet body 11 is a double-layer structure. The sealed door The inner surface of 12 is uniformly provided with threaded holes 15 communicating with the cavity 14, an air injection mechanism or a hole cover 16 is arranged on the threaded holes 15, the cavity 14 is connected with the air supply mechanism 8, and the top of the cabinet body 11 An exhaust mechanism is set, a temperature monitoring module 9 and a smoke monitoring module 10 are set in the cabinet 11, the air supply mechanism 8 is connected to the temperature monitoring module 9 and the smoke monitoring module 10, the noise monitoring module 6, the electromagnetic The radiation monitoring module 7 and the gas supply mechanism 8 are connected to the control center unit 3 through the data transmission unit 5 , and the control center unit 3 is connected to the terminal display unit 1 .

The gas supply mechanism 8 includes an air supply module, an inert gas supply module and a controller 28 connected thereto. The air supply module and the inert gas supply module are connected to the cavity 14 through a solenoid valve 23, and the solenoid valve 23 is connected with the controller 28. In order to meet the functions of ventilation, cooling and fire extinguishing, the cavity is connected to the air supply mechanism through a solenoid valve, and the solenoid valve is controlled by the controller. When only ventilation is required, the air supply module sucks in the outside air, and when cooling is required , the air supply module cools the inhaled air, and then sends it into the cavity. When it is necessary to extinguish the fire, the solenoid valve shuts off the connection between the air supply module and the cavity, and connects the inert gas supply module to the cavity, filling the inert gas Into the cavity and then filled into the cabinet to realize the fire extinguishing function. The use is more intelligent like this, and the function of the air supply mechanism is more powerful.

The inner surface of the cavity 14 is provided with an insulating layer 13, which can insulate the cold air, avoid additional temperature rise, and reduce the cooling effect.

The air supply module includes a filter screen 27, an air pump 26, and a cooling chamber 25 connected in sequence. A refrigeration module 24 is arranged in the cooling chamber 25. The filter screen prevents foreign debris from being sucked into the cabinet, and the air pump sucks in outside air to cool the air. The chamber body cooperates with the refrigeration module to cool down the inhaled air, and this structure can realize the function of supplying air or cold air. The refrigeration module can adopt the refrigeration mode of the compressor or semiconductor refrigeration.

Described inert gas supply module comprises the gas storage tank 29 that stores inert gas, inert gas can adopt carbon dioxide or nitrogen, because its consumption is not big, only uses when situation occurs in the cabinet, and is a sealed environment in the cabinet, therefore It only needs to set up a gas storage tank, which can extinguish the fire by blocking the oxygen.

Embodiment Three

As shown in Figures 1 and 2: this embodiment also provides a method for monitoring the temperature of the static contacts of a power switch cabinet, including a noise monitoring module 6 and an electromagnetic radiation monitoring module 7 uniformly arranged in a switch cabinet, a control room, and a data transmission Unit 5, control center unit 3 and terminal display unit 1. The switch cabinet includes a cabinet body 11 and a sealed door 12. A cavity 14 is provided inside the sealed door 12. The cabinet body 11 is a double-layer structure. The sealed The inner surface of the door 12 is uniformly provided with threaded holes 15 communicating with the cavity 14, an air injection mechanism or a hole cover 16 is arranged on the threaded holes 15, the cavity 14 is connected with the air supply mechanism 8, and the cabinet body 11 An exhaust mechanism is arranged above, a temperature monitoring module 9 and a smoke monitoring module 10 are arranged in the cabinet body 11, the air supply mechanism 8 is connected with the temperature monitoring module 9 and the smoke monitoring module 10, the noise monitoring module 6, The electromagnetic radiation monitoring module 7 and the gas supply mechanism 8 are connected to the control center unit 3 through the data transmission unit 5 , and the control center unit 3 is connected to the terminal display unit 1 .

The air injection mechanism includes an air injection pipe 20 movably arranged on the threaded hole 15, a semicircular spray head 21 is arranged on the top of the air injection pipe 20, and an air injection hole 22 is arranged on the spray head 21, which is a kind of air injection mechanism. One end of the jet pipe is provided with a thread matched with the threaded hole, which is convenient for fixing on the threaded hole, and the effect of thread sealing is also very good. The semi-circular nozzle set on the top of the jet pipe is convenient for the gas to spray in a scattered shape, which can well cover the heating equipment, and the cooling effect is better and more uniform.

Described exhaust mechanism comprises exhaust port 17 and exhaust duct 19, and described exhaust port 17 is provided with barbed wire 18, and exhaust mechanism is to discharge the gas that enters, and gas can heat up in cabinet, so exhaust mechanism is arranged on On the top of the cabinet, the barbed wire mesh at the exhaust port plays the role of electromagnetic shielding, avoiding incomplete electromagnetic shielding and affecting the outside world.

Embodiment Four

As shown in Figures 1 and 2: this embodiment also provides a method for monitoring the temperature of the static contacts of a power switch cabinet, including a noise monitoring module 6 and an electromagnetic radiation monitoring module 7 uniformly arranged in a switch cabinet, a control room, and a data transmission Unit 5, control center unit 3 and terminal display unit 1. The switch cabinet includes a cabinet body 11 and a sealed door 12. A cavity 14 is provided inside the sealed door 12. The cabinet body 11 is a double-layer structure. The sealed The inner surface of the door 12 is uniformly provided with threaded holes 15 communicating with the cavity 14, an air injection mechanism or a hole cover 16 is arranged on the threaded holes 15, the cavity 14 is connected with the air supply mechanism 8, and the cabinet body 11 An exhaust mechanism is arranged above, a temperature monitoring module 9 and a smoke monitoring module 10 are arranged in the cabinet body 11, the air supply mechanism 8 is connected with the temperature monitoring module 9 and the smoke monitoring module 10, the noise monitoring module 6, The electromagnetic radiation monitoring module 7 and the gas supply mechanism 8 are connected to the control center unit 3 through the data transmission unit 5 , and the control center unit 3 is connected to the terminal display unit 1 .

The data transmission unit 5 includes a fiber optic transceiver and an optical fiber, and the control center unit 3 includes a monitoring host 4 connected to the GIS module 2 . The data transmission unit uses optical fiber to transmit the information between the site and the control center unit, first of all, it is less affected by the surrounding environment, the information transmission speed is fast, and no additional electromagnetic radiation is generated, and the use safety is high. The control center unit includes a monitoring host, which can be an industrial control computer. The monitoring host is connected to the GIS module. The GIS module can combine the monitored radiation and noise information with the map of the substation and the map of the switch cabinet layout in the control room, in the form of a map. It shows the radiation and noise intensity of each location, provides detailed reference for on-site personnel, and is also conducive to early warning and rapid discovery of accidents, which is beneficial to both on-site personnel and equipment.

The GIS module 2 provides the position distribution map of the electrical switch cabinet in the control room, and combines the received electromagnetic radiation information and noise information with the position distribution map of the electrical switch cabinet to form a follow-up environmental information map. The monitoring host 4 Send the environmental information map to the terminal display unit 1 to remind the on-site staff of the environmental information.

The terminal display unit 1 adopts a display screen or a portable communication terminal set in the control room. The terminal display unit is to display the map information after combining the electromagnetic radiation information and noise information with the location distribution map of the electrical switchgear, which plays the role of early warning, timely detection of faults and reminders to workers, so it can be used indoors. display screens or portable communication terminals carried by every employee.

Finally, it is noted that the above embodiments are only used to illustrate the technical solution of the present invention without limitation, other modifications or equivalent replacements made by those skilled in the art to the technical solution of the present invention, as long as they do not depart from the spirit and spirit of the technical solution of the present invention All should be included in the scope of the claims of the present invention.

Claims (10)

1. a kind of power switch cabinet static contact temperature monitoring system it is characterised in that：Including switch cubicle, interior is controlled to be uniformly arranged Noise module and electromagnetic radiation monitoring module, data transmission unit, control centre's unit and terminal display unit, described Switch cubicle includes cabinet and hermatic door, setting cavity inside described hermatic door, and described cabinet is double-decker, in described hermatic door Surface is uniformly arranged the screwed hole connecting with described cavity, setting jet mechanism or port lid on described screwed hole, described cavity with Gas supply mechanism connects, and arranges setting temperature monitoring module and smoke monitoring mould in exhaust gear, described cabinet above described cabinet Block, described gas supply mechanism is connected with described temperature monitoring module and smoke monitoring module, described noise module, electromagnetic radiation Monitoring modular and gas supply mechanism are passed through data transmission unit and are connected with described control centre unit, described control centre unit and institute State terminal display unit to connect, in described switch cubicle, be provided with the infrared radiation thermometer for detection switch cabinet static contact, described infrared Temperature measurer is connected with Programmable Logic Controller, and described switch cubicle is respectively provided on two sides with main semiconductor cooling piece and secondary semiconductor refrigerating Piece, described main semiconductor cooling piece and secondary semiconductor chilling plate are all connected with Programmable Logic Controller.

2. power switch cabinet static contact temperature monitoring system as claimed in claim 1 it is characterised in that：Described main semiconductor dissipates The hot face setting main radiator of backing, the hot face setting secondary radiator of described pair semiconductor chilling plate, described main radiator sets There is main temperature sensor, described secondary radiator is provided with secondary temperature sensor, described main temperature sensor and secondary temperature sensor All it is connected with Programmable Logic Controller.

3. power switch cabinet static contact temperature monitoring system as claimed in claim 2 it is characterised in that：Described main semiconductor system Cold is equipped with heat conductive silica gel and between secondary semiconductor chilling plate and switch cubicle.

4. power switch cabinet static contact temperature monitoring system as claimed in claim 3 it is characterised in that：Described main radiator and Secondary radiator is all connected by elastic mechanism with switch cubicle.

5. power switch cabinet static contact temperature monitoring system as claimed in claim 4 it is characterised in that：Described elastic mechanism is The tower spring being arranged in main radiator and the screw rod threadeded with switch cubicle through tower spring.

6. power switch cabinet static contact temperature monitoring system as claimed in claim 5 it is characterised in that：Described main radiator and Secondary radiator is hollow structure, and is all filled with coolant inside main radiator and secondary radiator.

7. power switch cabinet static contact temperature monitoring system as claimed in claim 6 it is characterised in that：Described noise monitoring mould Block adopts noise level indicator, and described electromagnetic radiation monitoring module includes electromagnet radiation detection instrument.

8. power switch cabinet static contact temperature monitoring system as claimed in claim 7 it is characterised in that：Described temperature monitoring mould Block is correspondingly arranged in described jet mechanism, and described smoke monitoring module is arranged on described cabinet top.

9. power switch cabinet static contact temperature monitoring system as claimed in claim 8 it is characterised in that：Described gas supply mechanism bag Include air supply module, noble gases supply module and the controller being attached thereto, described air supply module and noble gases Supply module is connected with described cavity by electromagnetic valve, and described electromagnetic valve is connected with described controller.

10. the power switch cabinet static contact temperature monitoring method as described in any one of claim 1-9 it is characterised in that：Including Following steps：

1）After switch cubicle starts, Controlled by Programmable Controller main semiconductor cooling piece works, and main semiconductor cooling piece gives switch Cabinet is lowered the temperature；

2）When the main radiator temperature of main semiconductor cooling piece side exceedes setting high level, Programmable Logic Controller disconnects main semiconductor Cooling piece power supply, Controlled by Programmable Controller pair semiconductor chilling plate work simultaneously, secondary semiconductor chilling plate is lowered the temperature to switch cubicle；

3）When secondary semiconductor chilling plate works, main semiconductor cooling piece does not work, the temperature of main radiator being gradually lowered, when The secondary radiator temperature of secondary semiconductor chilling plate side exceedes setting value, and Programmable Logic Controller disconnects secondary semiconductor chilling plate electricity Source, Controlled by Programmable Controller main semiconductor cooling piece work simultaneously, main semiconductor cooling piece is lowered the temperature to switch cubicle.