CN110212643B - Transformer substation SF6 gas state monitoring system based on NB-IoT technology - Google Patents
Transformer substation SF6 gas state monitoring system based on NB-IoT technology Download PDFInfo
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- CN110212643B CN110212643B CN201910523836.2A CN201910523836A CN110212643B CN 110212643 B CN110212643 B CN 110212643B CN 201910523836 A CN201910523836 A CN 201910523836A CN 110212643 B CN110212643 B CN 110212643B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- H02J13/0075—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/128—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment involving the use of Internet protocol
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Abstract
The invention discloses a transformer substation SF6 gas state monitoring system based on an NB-IoT technology, which can monitor the SF6 gas state at a far end in real time, is beneficial to providing a feasible fault early warning scheme for the safe operation of equipment, improves the working level and the working quality, and prepares for the large data operation of the intelligent operation and detection equipment. The system comprises a monitoring terminal unit positioned at a remote terminal, a communication channel unit used for transmitting data of the monitoring terminal unit to a rear-end data storage unit, and a data display unit connected with the data storage unit and used for displaying the data; the monitoring terminal unit comprises a temperature sensor installation component which is installed on an SF6 density relay of the transformer substation, and the temperature sensor installation component comprises a temperature pressure sensor; an NB-IoT module is arranged in the temperature and pressure sensor; the temperature and pressure sensor is in wireless communication with the local display instrument through the NB-IoT module; all local display instruments are wirelessly connected with the wireless communication network of the communication channel unit.
Description
Technical Field
The invention relates to a substation SF6 state monitoring system, which is particularly used for monitoring temperature and pressure data of all SF6 density relays of a substation.
Background
The SF6 density relay is an important protection and control element in SF6 electrical equipment and plays an important role in ensuring the reliable operation of the equipment, and the operation pressure (P), the temperature (T) and the density value (P20) of SF6 gas must reach the regulations of relevant standards so as to keep the SF6 electrical equipment in a good working state for a long time. However, the SF6 electrical equipment monitoring means of more than 90% refers to a needle type SF6 density relay, the relay does not have a data remote transmission function, the gas pressure and the gas temperature cannot be remotely monitored, and only a density value (P20) is displayed. With the development of industrial technology in China, part of power enterprises also change the remote-transmission SF6 density relay, but in the changing process, the construction amount is huge, and a large amount of manpower and material resources are consumed.
In order to solve the problems, the maintainers hope to change the current situation by advanced scientific and technical means and realize the remote monitoring of the gas state of the SF6 electrical equipment. With the background, research and development personnel of our company develop an SF6 gas dynamic monitoring technology based on a ubiquitous Internet of things NB-IoT wireless communication mode, can monitor the SF6 gas state at a far end in real time, analyzes according to monitoring data, provides a feasible fault early warning scheme for safe operation of equipment, improves the working level and the working quality, and prepares for large data operation of intelligent operation and detection equipment.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a transformer substation SF6 gas state monitoring system based on NB-IoT technology, which can monitor the SF6 gas state at a remote end in real time, and is helpful to provide a feasible fault early warning scheme for the safe operation of equipment, improve the working level and the working quality, and prepare for the large data operation of the equipment for intelligent operation and inspection.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the transformer substation SF6 gas state monitoring system based on the NB-IoT technology comprises a monitoring terminal unit positioned at a remote terminal, a communication channel unit used for transmitting data of the monitoring terminal unit to a rear-end data storage unit and a data display unit connected with the data storage unit and used for displaying the data;
the monitoring terminal unit comprises a temperature sensor installation component installed on an SF6 density relay of the transformer substation, and the temperature sensor installation component comprises a temperature pressure sensor; an NB-IoT module is arranged in the temperature and pressure sensor; the temperature and pressure sensor and the local display instrument are in wireless communication through the NB-IoT module; all the local display instruments are wirelessly connected with a wireless communication network of the communication channel unit;
the data storage unit comprises an electric power Internet of things gateway, and the electric power Internet of things gateway is connected with a security technology platform with an embedded CMA port; the safety technology platform is in communication connection with the master station and is connected with the data display platform of the data display unit; the master station is connected with a PMS system of the data display unit;
the temperature and pressure sensor comprises a sensor mounting head and a disc-shaped mounting plate fixed at the end part of the sensor mounting head, wherein a boss is arranged on the surface of the mounting plate, a light-transmitting protective cover is in threaded connection with the outer end face of the boss, and a sensor sealing ring is arranged between the light-transmitting protective cover and the boss; a support stud is further fixed on the mounting plate, a lower circuit board is supported and fixed on the support stud, a sensor is arranged in the center of the lower circuit board, and the sensor penetrates through the lower circuit board; the surface of the lower circuit board is provided with a conductive socket, and a conductive plug of the upper circuit board is inserted into the conductive socket; the battery is fixed at the center of the upper circuit board, and the wireless transmitting antenna and the NB-IoT module are also fixed on the upper circuit board; the sensor comprises a pressure sensor and a temperature sensor; the end face, far away from the boss, of the light-transmitting protective cover is an end cover made of a wave-transmitting material; the sensor mounting head is radially provided with a rubber pad; the rubber pad is a fluorine rubber pad;
a photovoltaic bracket is inserted on the boss inside the light-transmitting protective cover, the cross section of the photovoltaic bracket is a regular polygon, and a photovoltaic plate is fixedly arranged on each side surface of the photovoltaic bracket; the lug boss is also provided with an antenna in an antenna slot which is arranged around the circumferential surface of the lug boss; the antenna also has a positioning rod inserted in the boss.
As a preferred embodiment of the present invention: the temperature sensor installing component comprises a temperature sensor installing component I and a temperature sensor installing component II; the temperature sensor additional assembly I comprises a four-way valve body, a valve is arranged at the top of the four-way valve body, and a sulfur hexafluoride body interface used for being connected and conducted with a sulfur hexafluoride equipment body is arranged at the bottom of the four-way valve body; one end face of the four-way valve body is provided with a meter interface which is used for being connected and conducted with the relay gas path joint, one end face, opposite to the meter interface, of the four-way valve body is provided with a gas supplementing interface, and a temperature pressure sensor is arranged on the four-way valve body and is adjacent to the meter interface and the gas supplementing interface;
the sulfur hexafluoride density relay comprises a three-way valve body, the three-way valve body is connected with the sulfur hexafluoride density relay through the relay expansion port, and the other two ports of the three-way valve body are respectively a sulfur hexafluoride equipment mounting port and an air supplement expansion port.
As a preferred embodiment of the present invention: the light-transmitting protective cover is a light-transmitting polycarbonate protective cover; the battery is a lithium argon battery; the photovoltaic panel is electrically connected with the lithium argon battery through a rectifier; the diameter of the light-transmitting protective cover is 36mm; the height is 35mm.
As a preferred embodiment of the present invention: the size of the upper surface of the light-transmitting protective cover is smaller than that of the lower surface of the light-transmitting protective cover, and inclined holes are symmetrically formed in the outer surface of the light-transmitting protective cover; the opening of the inclined hole is positioned on the outer surface, the inclined hole comprises a left inclined hole and a right inclined hole, and the left inclined hole points to the lower surface; the right inclined hole is directed to the upper surface.
As a preferred embodiment of the present invention: the mounting plate is a base, an insulating anti-theft nut is combined at the bottom end of the base, external threads are arranged on the outer edge of the bottom end of the base, first internal threads which are correspondingly screwed with the external threads are arranged at the top end of the insulating anti-theft nut, internal threads are additionally arranged on the inner edge of the bottom end of the base, second internal threads are additionally arranged at the bottom end of the insulating anti-theft nut, the second internal threads and the internal threads at the bottom end of the base are in the same spiral direction and are correspondingly connected, the second internal threads and the first internal threads are in opposite spiral directions, namely the first internal threads of the insulating anti-theft nut and the external threads of the base are designed into opposite teeth; when the base is screwed and fixed on the installation joint, the insulating anti-theft nut is screwed on the base in the same direction, and the base is embedded into the insulating anti-theft nut, wherein the insulating anti-theft nut has a special shape and can be unscrewed by a special hand tool, if the insulating anti-theft nut is not opened by using the special hand tool and the base is rotated in the opposite direction by bare hands, the combination of the insulating anti-theft nut and the base is tighter and tighter, so that a thief cannot take away the temperature and pressure sensor by the bare hands, and the anti-theft effect is achieved.
As a preferred embodiment of the present invention: air holes are formed in the positions, corresponding to the temperature pressure sensor, the air supplementing interface and the sulfur hexafluoride body interface, of the four-way valve body; the air supply interface is provided with a detachable plug;
when the valve is opened, the relay air inlet pipe and the sulfur hexafluoride body interface are conducted through the four-way valve body air passage; when the valve is closed, the relay air inlet pipe is communicated with the air supply interface air passage.
As a preferred embodiment of the present invention: the conductive plug and the conductive socket comprise conductive wiring terminals, and the lower circuit board and the upper circuit board comprise a CPU, an NB-IoT module and a temperature and pressure signal processing module; the CPU is msp430g2433, and the NB-IoT module is a BC95-B5/B8 module of a 'moving away' brand.
As a preferred embodiment of the present invention: the communication channel is an NB-IoT network or an APN private network or a GPRS network; the three-way valve body and the four-way valve body are made of all stainless steel materials, and the temperature sensor is additionally provided with components which pass through three inspection processes of water inspection, gas inspection and helium mass spectrum leakage inspection; the temperature and pressure sensor is internally provided with a Betty Bridgman state equation, and the current gas density value is automatically calculated according to the acquired SF6 gas pressure and temperature; the temperature and pressure sensor sends data within a normal range to the data storage unit once within 24 hours according to a preset threshold, and if the data exceeds the preset threshold, the data sending interval is shortened to 5 minutes once.
As a preferred embodiment of the present invention: the back panel of the on-site display instrument is provided with 33 pressure signal input channels and 1 temperature signal; 2 paths of alarm signals; the controller of the local display instrument comprises an amplifying circuit module, an ARM processor, a digital-to-analog converter, a voltage-to-current converter and a current galvanostat; the controller amplifies signals transmitted by the pressure acquisition sensor, the sulfur hexafluoride density meter and the temperature sensor through a built-in amplifying circuit module, and the amplified signals are calculated through the ARM processor; the signal data obtained by calculation is converted into a voltage signal through a digital-to-analog converter, then the voltage signal is converted into a current signal through a voltage-to-current converter, and the current signal passes through a current galvanostat and then is transmitted through a communication module of the local display instrument.
The invention has the beneficial effects that:
the invention relates to a transformer substation SF6 gas state monitoring system based on NB-IoT technology, which comprises a monitoring terminal unit positioned at a remote terminal, a communication channel unit used for transmitting data of the monitoring terminal unit to a rear-end data storage unit and a data display unit connected with the data storage unit and used for displaying the data; the monitoring terminal unit is used for collecting SF6 gas and temperature at the position of the sulfur hexafluoride density relay, the communication channel unit is used for wireless transmission, and the data display unit is used for displaying data in real time to achieve a monitoring effect;
the monitoring terminal unit comprises a temperature sensor installation component which is installed on an SF6 density relay of the transformer substation, and the temperature sensor installation component comprises a temperature pressure sensor; an NB-IoT module is arranged in the temperature and pressure sensor; the temperature and pressure sensor and the local display instrument are in wireless communication through the NB-IoT module; all the local display instruments are wirelessly connected with the wireless communication network of the communication channel unit; the temperature sensor is additionally arranged, so that the temperature, pressure and density information can be intelligently collected in a large area and transmitted in a centralized way; the NB-IoT module has low transmission cost, low power consumption and long service life, so that the whole system is more stable, and the modification cost is reduced; the local display instrument plays a role of wireless relay, so that data transmission is more reasonable and reliable;
the data storage unit comprises an electric power Internet of things gateway, and the electric power Internet of things gateway is connected with a security technology platform with an embedded CMA port; the safety technology platform is in communication connection with the master station and is connected with the data display platform of the data display unit; the master station is connected with a PMS system of the data display unit; the whole data transmission and display are in accordance with national network safety standards and management standards, so that the applicability is strong, and the method can be popularized in a large area.
The temperature and pressure sensor transmits data through the NB-IoT module, and has the advantages of low power consumption, long distance and the like of the NB-IoT module; the temperature and pressure sensor provides a plug-in type conductive plug and conductive socket structure on the basis of ensuring the traditional sealing structure, thus realizing the plug-in structure, being easy to replace and maintain devices and reducing the maintenance cost; the battery and the upper circuit board are fixedly connected (generally welded) in a way, so that the space is saved; the housing of wave-transparent material ensures reliable transmission of wireless signals. A photovoltaic bracket is inserted into a boss inside a light-transmitting protective cover of the temperature and pressure sensor, the cross section of the photovoltaic bracket is a regular polygon, and a photovoltaic plate is fixedly arranged on each side surface of the photovoltaic bracket; the lug boss is also provided with an antenna in an antenna slot which is arranged around the circumferential surface of the lug boss; the antenna also has a positioning rod for being inserted in the boss. The photovoltaic panel is supplemented and compensated for one circle, and can be used for lighting and power generation at 360 degrees; the antenna is built in and embedded into the antenna slot, so that the transmitted signal strength can be ensured, and the occupied space is reduced; the locating lever of antenna can let the fixed of antenna more reliable.
Drawings
FIG. 1 is a schematic perspective view of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of one embodiment of a temperature and pressure sensor according to the present invention;
fig. 3 is a schematic structural diagram of an embodiment of an antenna according to the present invention;
FIG. 4 is a schematic structural diagram of a preferred embodiment of the temperature and pressure sensor of the present invention;
FIG. 5 is a schematic view of the installation position of the temperature and pressure sensor according to the present invention;
FIG. 6 is a schematic block circuit diagram of one embodiment of a temperature and pressure sensor of the present invention;
FIG. 7 is a schematic view of a four-way valve assembly of the temperature and pressure sensor according to the present invention;
fig. 8 is a schematic view of the installation structure of the air supply port assembly of the temperature and pressure sensor of the present invention.
Description of reference numerals:
100-a monitoring terminal unit, 200-a communication channel unit, 300-a data storage unit and 400-a data display unit; 1001-local display instrument, 1002-temperature sensor installation component I, 1003-temperature sensor installation component II; 2001-wireless communication network; 3001-electric power internet of things gateway, 3002-security technology platform, 3003-main station; 4001-data display platform, 4002-PMS system;
101-wave-transparent material, 102-light-transmitting protective cover, 103-sensor, 104-conductive plug, 105-sensor sealing ring, 106-support stud, 107-sensor mounting head, 108-lithium argon battery, 109-upper circuit board, 110-conductive socket, 111-lower circuit board, 112-fluororubber pad, 113-photovoltaic board, 117-antenna, 118-positioning rod, 119-inclined hole, 120-base, 121-insulating antitheft nut, 123-mounting joint and 124-air inlet;
1032: rectifier, 1033: temperature-pressure signal processing module, 1034: temperature sensor, 1035: pressure sensor, 1036: CPU,1037: NB-IoT module, 1038: terminal, 1039: a lithium argon battery;
201-a relay body, 202-a meter interface, 203-a valve, 204-a temperature pressure sensor, 205-a gas supplementing interface, 206-a sulfur hexafluoride body interface, 207-a four-way valve body, 208-a sulfur hexafluoride equipment mounting port, 209-a relay expansion port and 210-a three-way valve body.
Detailed Description
The following description of the embodiments of the invention refers to the accompanying drawings and examples:
as shown in fig. 1 to 8, which illustrate an embodiment of the present invention, as shown in fig. 1, the transformer substation SF6 gas state monitoring system based on NB-IoT technology of the present invention includes a monitoring terminal unit 100 located at a remote terminal, a communication channel unit 200 for transmitting data of the monitoring terminal unit to a back-end data storage unit 300, and a data presentation unit 400 connected to the data storage unit and for presenting data;
the monitoring terminal unit comprises a temperature sensor installation component installed on an SF6 density relay of the transformer substation, and the temperature sensor installation component comprises a temperature pressure sensor 204; an NB-IoT module 1037 is disposed within the temperature and pressure sensor; the temperature and pressure sensor and the local display instrument are in wireless communication through the NB-IoT module; all local display instruments are wirelessly connected with a wireless communication network 2001 of a communication channel unit;
the data storage unit comprises an electric power internet of things gateway 3001, and the electric power internet of things gateway is connected with a security technology platform 3002 with an embedded CMA port; the security technology platform 3002 is in communication connection with the master station 3003 and is connected with the data display platform 4001 of the data display unit; the master station is connected with the PMS system 4002 of the data display unit;
the temperature and pressure sensor comprises a sensor mounting head 107 and a disc-shaped mounting plate fixed at the end part of the sensor mounting head, wherein a boss is arranged on the surface of the mounting plate, a light-transmitting protective cover 102 is in threaded connection with the outer end face of the boss, and a sensor sealing ring 105 is arranged between the light-transmitting protective cover and the boss; a support stud 106 is further fixed on the mounting plate, a lower circuit board 111 is supported and fixed on the support stud, a sensor is arranged in the center of the lower circuit board, and the sensor penetrates through the lower circuit board; the surface of the lower circuit board is provided with a conductive socket 110, and a conductive plug 104 of the upper circuit board is inserted in the conductive socket; the battery is fixed in the center of the upper circuit board 109, and the wireless transmitting antenna 117 and the NB-IoT module 1037 are also fixed on the upper circuit board; the sensors include a pressure sensor 1035 and a temperature sensor 1034; the end face, far away from the boss, of the light-transmitting protective cover is an end cover made of a wave-transmitting material 101; a rubber pad is radially arranged on the sensor mounting head; the rubber pad is a fluororubber pad;
a photovoltaic bracket is inserted on the boss inside the light-transmitting protective cover, the cross section of the photovoltaic bracket is a regular polygon, and a photovoltaic panel 113 is fixedly arranged on each side surface of the photovoltaic bracket; the boss is also provided with an antenna 117 in an antenna slot surrounding the circumferential surface of the boss; the antenna also has a locating rod 118 for insertion into the boss.
Preferably, as shown in fig. 1, 7 and 8: the temperature sensor installing component comprises a temperature sensor installing component I and a temperature sensor installing component II; the temperature sensor additional assembly I comprises a four-way valve body 207, a valve 203 is mounted at the top of the four-way valve body, and a sulfur hexafluoride body interface 206 used for being connected and conducted with a sulfur hexafluoride equipment body is mounted at the bottom of the four-way valve body; one end face of the four-way valve body is provided with a meter interface 202 which is used for being connected and conducted with the relay gas path joint, one end face of the four-way valve body, which is opposite to the meter interface, is provided with a gas supplementing interface 205, and a temperature pressure sensor is arranged on the four-way valve body, which is adjacent to the meter interface and the gas supplementing interface;
the sulfur hexafluoride density relay comprises a temperature sensor, a temperature pressure sensor, a temperature sensor installing component II, a sulfur hexafluoride density relay, a three-way valve body 210, a relay expanding port and a sulfur hexafluoride equipment installing port 208.
Preferably, as shown in fig. 2: the light-transmitting protective cover is a light-transmitting polycarbonate protective cover; the battery is a lithium argon battery; the photovoltaic panel is electrically connected with the lithium argon battery through a rectifier; the diameter of the light-transmitting protective cover is 36mm; the height is 35mm. When the lithium argon battery is purchased, the lithium argon battery is an imported wide-temperature coin-type lithium argon battery, and the service life of the battery is greatly prolonged due to double-mode power supply. The sensor is designed into the size of
The height is 35mm; the sensor adopts a micro-power consumption industrial element and an IC chip; the sensor adopts a 360-degree inlet light energy-taking plate, and a high-strength light-transmitting polycarbonate protective cover is arranged on the outer side of the sensor; the energy can be stored under the condition of low light level, an imported wide-temperature coin-type lithium-argon battery is arranged in the sensor, and the sensor is guaranteed to run reliably within 10-15 years.
Preferably, as shown in fig. 4: the size of the upper surface of the light-transmitting protective cover is smaller than that of the lower surface of the light-transmitting protective cover, and inclined holes 119 are symmetrically formed in the outer surface of the light-transmitting protective cover; the opening of the inclined hole is positioned on the outer surface, the inclined hole comprises a left inclined hole and a right inclined hole, and the left inclined hole points to the lower surface; the right inclined hole is directed to the upper surface. The light-transmitting protective cover is in a round table shape, so that the light-transmitting protective cover is not easy to directly rotate by hands; in addition, the angles of the inclined holes on the light-transmitting protective cover and the horizontal plane are different, the inclined hole on the left side points to the lower surface, the inclined hole on the right side points to the upper surface, the two inclined holes do not point to the opening connecting line of the two inclined holes, and the aperture is small, so that a common tool is difficult to forcibly screw the light-transmitting protective cover.
Preferably, as shown in fig. 4: the mounting plate is a base, an insulating anti-theft nut 121 is combined at the bottom end of the base, an external thread is arranged on the outer edge of the bottom end of the base, a first internal thread which is correspondingly screwed with the external thread is arranged at the top end of the insulating anti-theft nut, an internal thread is additionally arranged on the inner edge of the bottom end of the base, a second internal thread is additionally arranged at the bottom end of the insulating anti-theft nut, the second internal thread and the internal thread at the bottom end of the base are in the same spiral direction and are correspondingly connected, the second internal thread and the first internal thread are in opposite spiral directions, namely the first internal thread of the insulating anti-theft nut and the external thread of the base are designed into opposite teeth; when the base is screwed and fixed on the installation joint, the insulating anti-theft nut is screwed on the base 120 in the same direction, so that the base is embedded in the insulating anti-theft nut, wherein the insulating anti-theft nut has a special shape and can be unscrewed by a special hand tool, if the insulating anti-theft nut is not opened by using the special hand tool and the base is rotated in the opposite direction by bare hands, the combination of the insulating anti-theft nut and the base is tighter and tighter, so that a thief cannot take away the temperature and pressure sensor by the bare hands, and the anti-theft effect is achieved.
Preferably, as shown in fig. 7: air holes are formed in the positions, corresponding to the temperature pressure sensor, the air supplementing interface and the sulfur hexafluoride body interface, of the four-way valve body; the air supplementing interface is provided with a detachable plug;
when the valve is opened, the relay air inlet pipe and the sulfur hexafluoride body interface are conducted through the four-way valve body air passage; when the valve is closed, the relay air inlet pipe is communicated with the air supply interface air passage. The air supply interface is used for supplying air, the temperature pressure sensor is used for monitoring temperature and pressure, therefore, air supply work can be realized only by connecting the air supply interface and the rotary valve during air supply, and the sulfur hexafluoride density relay does not need to be disassembled.
Preferably, as shown in the figure: the conductive plug and the conductive socket comprise conductive wiring terminals, and the lower circuit board and the upper circuit board comprise a CPU, an NB-IoT module and a temperature and pressure signal processing module; the CPU is msp430g2433, and the NB-IoT module is a BC95-B5/B8 module of a 'moving away' brand.
Preferably, as shown in the figure: the communication channel is an NB-IoT network or an APN private network or a GPRS network; the three-way valve body 210 and the four-way valve body are made of stainless steel, and the temperature sensor is additionally provided with components which pass through three detection processes of water detection, gas detection and helium mass spectrum leakage detection; the temperature and pressure sensor is internally provided with a Betty Bridgman state equation, and the current gas density value is automatically calculated according to the acquired SF6 gas pressure and temperature; the temperature and pressure sensor sends data within a normal range to the data storage unit once within 24 hours according to a preset threshold, and if the data exceeds the preset threshold, the data sending interval is shortened to 5 minutes once.
Preferably, as shown in the figure: the back panel of the local display instrument 1001 is provided with 33 pressure signal input channels and 1 temperature signal; 2 paths of alarm signals; the controller of the local display instrument comprises an amplifying circuit module, an ARM processor, a digital-to-analog converter, a voltage-to-current converter and a current galvanostat; the controller amplifies signals transmitted by the pressure acquisition sensor, the sulfur hexafluoride density meter and the temperature sensor through a built-in amplifying circuit module, and the amplified signals are calculated through the ARM processor; the signal data obtained by calculation is converted into a voltage signal through a digital-to-analog converter, then the voltage signal is converted into a current signal through a voltage-to-current converter, and the current signal passes through a current galvanostat and then is transmitted through a communication module of the local display instrument.
In a particular alternative, the parameters of the temperature and pressure sensor in a particular embodiment of the invention may be referenced in the following table:
specific parameters for the local display (also called wireless repeater) may be as follows:
a: the sensor access number is as follows: maximum 36 groups (based on field conditions); wireless receiving mode: loRa;
the wireless uploading mode comprises the following steps: an NB-ioT wireless data transmission module (a built-in encryption communication module conforming to national network standard);
transmission distance: wide area network, without distance restrictions;
power supply: AC220\ DC110\ DC220;
protection grade: and (4) IP65.
B: the number of sensors connected: maximum 36 groups (depending on field conditions); wireless receiving mode: loRa;
wireless uploading mode: the 4G wireless data transmission module (internally provided with an encryption communication module conforming to national network standards);
transmission distance: wide area network, without distance limitations;
power supply: AC220\ DC110\ DC220;
protection grade: and IP65.
While the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the above embodiments, and various changes, which relate to the related art known to those skilled in the art and fall within the scope of the present invention, can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.
Claims (9)
1. Transformer substation SF6 gas state monitoring system based on NB-IoT technique its characterized in that: the monitoring terminal unit is positioned at a remote terminal, the communication channel unit is used for transmitting the data of the monitoring terminal unit to the rear-end data storage unit, and the data display unit is connected with the data storage unit and is used for displaying the data;
the monitoring terminal unit comprises a temperature sensor installation component which is installed on an SF6 density relay of the transformer substation, and the temperature sensor installation component comprises a temperature pressure sensor; an NB-IoT module is arranged in the temperature and pressure sensor; the temperature and pressure sensor and the local display instrument are in wireless communication through the NB-IoT module; all the local display instruments are wirelessly connected with the wireless communication network of the communication channel unit;
the data storage unit comprises an electric power Internet of things gateway, and the electric power Internet of things gateway is connected with a security technology platform with an embedded CMA port; the safety technology platform is in communication connection with the master station and is connected with the data display platform of the data display unit; the master station is connected with a PMS system of the data display unit;
the temperature and pressure sensor comprises a sensor mounting head and a disc-shaped mounting plate fixed at the end part of the sensor mounting head, wherein a boss is arranged on the surface of the mounting plate, a light-transmitting protective cover is in threaded connection with the outer end face of the boss, and a sensor sealing ring is arranged between the light-transmitting protective cover and the boss; a support stud is further fixed on the mounting plate, a lower circuit board is supported and fixed on the support stud, a sensor is arranged in the center of the lower circuit board, and the sensor penetrates through the lower circuit board; the surface of the lower circuit board is provided with a conductive socket, and a conductive plug of the upper circuit board is inserted into the conductive socket; the battery is fixed at the center of the upper circuit board, and the wireless transmitting antenna and the NB-IoT module are also fixed on the upper circuit board; the sensor comprises a pressure sensor and a temperature sensor; the end face, far away from the boss, of the light-transmitting protective cover is an end cover made of a wave-transmitting material; the sensor mounting head is radially provided with a rubber pad; the rubber pad is a fluorine rubber pad;
a photovoltaic bracket is inserted on the boss inside the light-transmitting protective cover, the cross section of the photovoltaic bracket is a regular polygon, and a photovoltaic plate is fixedly arranged on each side surface of the photovoltaic bracket; the lug boss is also provided with an antenna in an antenna slot which is arranged around the circumferential surface of the lug boss; the antenna also has a positioning rod for being inserted in the boss.
2. The NB-IoT technology-based substation SF6 gas status monitoring system of claim 1, wherein: the temperature sensor installing component comprises a temperature sensor installing component I and a temperature sensor installing component II; the temperature sensor additional assembly I comprises a four-way valve body, a valve is arranged at the top of the four-way valve body, and a sulfur hexafluoride body interface used for being connected and conducted with a sulfur hexafluoride equipment body is arranged at the bottom of the four-way valve body; one end face of the four-way valve body is provided with a meter interface used for being connected and conducted with the relay gas circuit connector, one end face, opposite to the meter interface, of the four-way valve body is provided with a gas supplementing interface, and a temperature pressure sensor is arranged on the four-way valve body and is adjacent to the meter interface and the gas supplementing interface;
the sulfur hexafluoride density relay comprises a three-way valve body, the three-way valve body is connected with the sulfur hexafluoride density relay through the relay expansion port, and the other two ports of the three-way valve body are respectively a sulfur hexafluoride equipment mounting port and an air supplement expansion port.
3. The NB-IoT technology based substation SF6 gas status monitoring system of claim 1, wherein: the light-transmitting protective cover is a light-transmitting polycarbonate protective cover; the battery is a lithium argon battery; the photovoltaic panel is electrically connected with the lithium argon battery through a rectifier; the diameter of the light-transmitting protective cover is 36mm; the height is 35mm.
4. The NB-IoT technology-based substation SF6 gas status monitoring system of claim 1, wherein: the size of the upper surface of the light-transmitting protective cover is smaller than that of the lower surface of the light-transmitting protective cover, and inclined holes are symmetrically formed in the outer surface of the light-transmitting protective cover; the opening of the inclined hole is positioned on the outer surface, the inclined hole comprises a left inclined hole and a right inclined hole, and the left inclined hole points to the lower surface; the right inclined hole points to the upper surface.
5. The NB-IoT technology-based substation SF6 gas status monitoring system of claim 1, wherein: the mounting plate is a base, an insulating anti-theft nut is combined at the bottom end of the base, external threads are arranged on the outer edge of the bottom end of the base, first internal threads which are correspondingly screwed with the external threads are arranged at the top end of the insulating anti-theft nut, internal threads are additionally arranged on the inner edge of the bottom end of the base, second internal threads are additionally arranged at the bottom end of the insulating anti-theft nut, the second internal threads and the internal threads at the bottom end of the base are in the same spiral direction and are correspondingly connected, the second internal threads and the first internal threads are in opposite spiral directions, namely the first internal threads of the insulating anti-theft nut and the external threads of the base are designed into opposite teeth; when the base is screwed and fixed on the installation joint, the insulating anti-theft nut is screwed on the base in the same direction, and the base is embedded into the insulating anti-theft nut, wherein the insulating anti-theft nut has a special shape and can be unscrewed by a special hand tool, if the insulating anti-theft nut is not opened by using the special hand tool and the base is rotated in the opposite direction by bare hands, the combination of the insulating anti-theft nut and the base is tighter and tighter, so that a thief cannot take away the temperature and pressure sensor by the bare hands, and the anti-theft effect is achieved.
6. The NB-IoT technology-based substation SF6 gas status monitoring system of claim 2, wherein: air holes are formed in the positions, corresponding to the temperature and pressure sensor, the air supplementing interface and the sulfur hexafluoride body interface, of the four-way valve body; the air supply interface is provided with a detachable plug;
when the valve is opened, the relay air inlet pipe and the sulfur hexafluoride body interface are conducted through the four-way valve body air passage; when the valve is closed, the air inlet pipe of the relay is communicated with the air supply interface.
7. The NB-IoT technology-based substation SF6 gas status monitoring system of claim 1, wherein: the conductive plug and the conductive socket comprise conductive wiring terminals, and the lower circuit board and the upper circuit board comprise a CPU, an NB-IoT module and a temperature and pressure signal processing module; the CPU is msp430g2433, and the NB-IoT module is a BC95-B5/B8 module of a 'moving away' brand.
8. The NB-IoT technology-based substation SF6 gas status monitoring system of claim 2, wherein: the communication channel is an NB-IoT network or an APN private network or a GPRS network; the three-way valve body and the four-way valve body are made of all stainless steel materials, and the temperature sensor is additionally provided with components which pass through three inspection processes of water inspection, gas inspection and helium mass spectrum leakage inspection; the temperature and pressure sensor is internally provided with a Betty Bridgman state equation, and the current gas density value is automatically calculated according to the acquired SF6 gas pressure and temperature; the temperature and pressure sensor sends data within a normal range to the data storage unit once within 24 hours according to a preset threshold, and if the data exceeds the preset threshold, the data sending interval is shortened to 5 minutes once.
9. The NB-IoT technology-based substation SF6 gas status monitoring system of claim 1, wherein: the back panel of the on-site display instrument is provided with 33 pressure signal input channels and 1 temperature signal; 2 paths of alarm signals; the controller of the local display instrument comprises an amplifying circuit module, an ARM processor, a digital-to-analog converter, a voltage-to-current converter and a current galvanostat; the controller amplifies signals transmitted by the pressure acquisition sensor, the sulfur hexafluoride density meter and the temperature sensor through a built-in amplifying circuit module, and the amplified signals are calculated through the ARM processor; the signal data obtained by calculation is converted into a voltage signal through a digital-to-analog converter, then the voltage signal is converted into a current signal through a voltage-to-current converter, and the current signal passes through a current galvanostat and then is transmitted through a communication module of the local display instrument.
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| CN110836835A (en) * | 2019-10-30 | 2020-02-25 | 国网福建省电力有限公司检修分公司 | Intelligent SF6 density on-line monitoring data analysis and information feedback system |
| CN116222668A (en) * | 2020-08-18 | 2023-06-06 | 成都一通密封股份有限公司 | Pressure sensing corrector and pressure sensing correction system thereof |
| CN112798398A (en) * | 2020-12-30 | 2021-05-14 | 广西电网有限责任公司电力科学研究院 | Be used for GIS density relay gas pressure testing arrangement |
| CN113777085B (en) * | 2021-09-14 | 2024-06-04 | 河北地质大学 | Floating algae concentration monitor based on fluorescence sensing technology |
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