CN208847830U - A kind of wireless sensor device and wireless detecting system - Google Patents
A kind of wireless sensor device and wireless detecting system Download PDFInfo
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- CN208847830U CN208847830U CN201820374052.9U CN201820374052U CN208847830U CN 208847830 U CN208847830 U CN 208847830U CN 201820374052 U CN201820374052 U CN 201820374052U CN 208847830 U CN208847830 U CN 208847830U
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Abstract
The utility model discloses a kind of wireless sensing devices, it is detected applied to high pressure oil immersion current transformer, including temperature sensor, pressure sensor, signal processing unit, sensor main control unit and radio receiving transmitting module, temperature sensor and pressure sensor are separately connected signal processing unit, signal processing unit connects sensor main control unit, and sensor main control unit connects radio receiving transmitting module.The utility model also provides a kind of wireless detecting system.Wireless sensing device and wireless detecting system provided by the utility model, pass through the temperature and pressure value in detection high pressure oil immersion current transformer, and server is sent to by radio receiving transmitting module, can whether to occur few oil in real-time detection high pressure oil immersion current transformer, the accidents such as breakdown occur, while avoid the problem that personnel's inspection not in time and waste of manpower.
Description
Technical field
The utility model relates to high voltage electric equipment technical field, more particularly to one kind are mutual applied to high pressure oil immersion electric current
The wireless sensing device and wireless detecting system of sensor.
Background technique
High pressure oil immersion current transformer using oil insulate to coil, high-tension apparatus in the process of running usually because
Certain reason occurs internal breakdown and generates bulk gas, so that internal pressure be caused to increase, or even sets off an explosion.High pressure oil at present
The explosion-proof mode of immersion current transformer is installation metal expander, and when mutual inductor breaks down, the gas of generation makes interior
Portion's pressure rise extends metal expander to achieve the purpose that release stress and prompt failure.Or it is mutual in oil-immersed current
Explosion-protection equipment is filled on sensor, and venting of dust explosion is carried out when pressure reaches certain value.No matter which kind of explosion-proof mode all can only be in pressure mistake
It attends the meeting greatly and is just acted when causing equipment damage, and also need personnel's inspection that could find failure.
In addition, the insulation performance of equipment, which can weaken, even results in punch through damage, at present still when oil leak situation occurs in equipment
It can only just can know that by manual inspection by observing oil level inspection hole.And mutual inductor is generally relatively high, cannot be directly viewed
Oil level in observation window increases inspection difficulty.
Utility model content
Existing high pressure oil immersion current mulual inductor malfunction context of detection there are aiming at the problem that, the utility model embodiment mentions
For wireless sensing device and wireless detecting system, can detect in time whether occur in high pressure oil immersion current transformer breakdown,
The failures such as oil leak, and solve the problems, such as manual inspection.
A kind of wireless sensing device provided by the embodiment of the utility model, be applied to high pressure oil immersion current transformer into
Row detection, including temperature sensor, pressure sensor, signal processing unit, sensor main control unit and radio receiving transmitting module, temperature
Degree sensor and pressure sensor are separately connected signal processing unit, and signal processing unit connects sensor main control unit, sensing
Device main control unit connects radio receiving transmitting module；
Temperature sensor is used for the temperature that the temperature in high pressure oil immersion current transformer is detected and be will test
Detection signal is sent to signal processing unit；
Pressure sensor is used for the pressure that the pressure in high pressure oil immersion current transformer is detected and be will test
Detection signal is sent to signal processing unit；
Signal processing unit, and will treated temperature for handling temperature detection signal and pressure detecting signal
Detected signal value and pressure detecting signal value are sent to sensor main control unit；
Sensor main control unit is for receiving temperature detection signal value and pressure detecting after signal processing unit processes
Signal value, and sent by radio receiving transmitting module.
Under normal circumstances, since temperature change oily in high pressure oil immersion current transformer can make volume change, from
And internal pressure is caused to change, this variation range is smaller, generally ± 10Kpa or so, so basic place inside current transformer
In micro-positive pressure or tiny structure.Wireless sensing device provided by the embodiment of the utility model, real-time measurement high pressure oil immersion electric current are mutual
Temperature detection signal value and detected signal value are uploaded to server by wireless signal and carried out just by the pressure and temperature in sensor
Ground shows or upload the data to again that backstage is shown.After receiving data, it can judge whether equipment occurs by temperature height
Failure and cause to generate heat, judge whether equipment bulk gas or oil leak situation occurs by pressure size.That is the utility model
The wireless sensing device of offer, can be with real-time detection to find whether break down in current transformer in time, to overcome
Existing detection device cannot detect in time, but will be when deformation occurs just recognizes and have occurred that failure for metal expander.
Meanwhile temperature detection signal value and pressure detecting signal value are transferred to by server by setting radio receiving transmitting module, it does not need
It arranges personnel to go live inspection again, both saves manpower, also improve efficiency.
It preferably, further include power module, power module connects sensor main control unit, and sensor main control unit passes through
IO1 interface connects temperature sensor, sensor main control unit and connects pressure sensor, sensor main control unit by IO2 interface
Temperature sensor data acquisition port and pressure sensor data acquisition port are separately connected by signal processing unit.Pass through setting electricity
Source module provides power supply, such as battery, lithium battery, power supply and wireless sensing device can be arranged integrally, not need again
In addition route is provided power supply is provided, that is, does not need still further to be routed on high-tension apparatus, the safety of device can be provided, while
The installation of more convenient device.
Preferably, sensor main control unit includes memory and processor, and memory is stored with executable computer program
The temperature detection data and pressure sensor detected with temperature sensor detect pressure detection data, and processor is for calling
The computer executable program that stores in memory simultaneously realizes following method for managing power supply:
Data acquire energizing step: when the preset data acquisition intervals time arrives, passing through IO1 interface and IO2 interface
High level is sent to temperature sensor and pressure sensor, opens the feeder ear of temperature sensor and pressure sensor acquisition data
Mouthful；And when receiving the temperature detection signal and pressure detecting signal that temperature sensor and pressure sensor detect, pass through
IO1 interface and IO2 interface send low level to temperature sensor and pressure sensor, close the temperature sensor and pressure passes
The supply port of sensor acquisition data；
Data processing energizing step: the temperature detection signal value and pressure for calling the last time stored in memory to detect
Detected signal value calculates the temperature between just collected temperature detection signal value and last collected temperature detection signal value
Spend the pressure between change in detection signal value and just collected pressure detecting signal value and last acquisition pressure detecting signal value
Power change in detection signal value, and judge whether temperature detection signal changing value is less than preset temperature change threshold value, judge simultaneously
Whether pressure detecting signal changing value is less than preset pressure change threshold value, if so, control sensor main control unit enter it is low
Power consumption mode, if wherein temperature detection signal changing value or pressure detecting signal changing value any one of be greater than and become
Change threshold value, the temperature detection signal value and pressure detecting signal value that have just detected are sent by radio receiving transmitting module immediately.
Sensor main control unit is by the power supply management to temperature sensor, pressure sensor, in temperature sensor and pressure
When force snesor does not need to carry out data acquisition, supply port is disconnected, electric energy can be saved.It is sent simultaneously by control data
Frequency, when not needing to handle and send data, whole device is in low-power consumption mode, can save electric energy to the maximum limit,
So that power module, as the electricity in battery, lithium battery can guarantee wireless sensing device in high pressure oil immersion Current Mutual Inductance
Device whole life cycle carries out temperature and pressure detection and does not all need in addition to replace battery.
Preferably, data processing energizing step further include: when judge temperature detection signal changing value be less than preset temperature
Change threshold, and pressure detecting signal changing value be less than preset pressure change threshold value when, then judge whether to data send
Interval time sends the just collected temperature detection signal value and pressure detecting letter if having arrived data transmission interval time
Number value, otherwise, into low-power consumption mode.By the way that data transmission interval time is arranged, may remain in the regular hour will be adopted
The temperature detection signal value and pressure detecting signal value collected is sent to server, to facilitate server staff to check, together
When facilitate server to save relevant historical data, and can be by being changed at trend analysis to the historical data of preservation
Reason, to analyze the working condition of high pressure oil immersion current transformer.
Preferably, data processing energizing step is judging whether to before data transmission interval time, further includes:
Judge just whether collected temperature detection signal value is less than preset temperature threshold, and just collected pressure inspection
It surveys whether signal value is less than preset first pressure threshold value, or is greater than preset second pressure threshold value, if it is, continuing to sentence
It is disconnected whether to arrive data transmission interval time, otherwise, just collected temperature detection signal value and the pressure detecting are sent immediately
Signal value.Wherein preset temperature threshold is dangerous temperature value, illustrates that temperature is too high higher than this temperature, failure or few occurs
Whether oil, first pressure threshold value are the first safe pressure value, for characterizing in current transformer because a large amount of gas of accident generation occur
Body illustrates to produce a large amount of gas in equipment, there is accident hair if pressure detecting signal value is greater than the first safe pressure value
It is raw；Second pressure threshold value is the second safe pressure value, for characterize equipment whether oil leak, if pressure detecting signal value is less than the
Two pressure thresholds illustrate that oil accident has occurred in current transformer.In addition to comparing transformed value, also compare the temperature inspection detected
Whether survey signal value and pressure detecting signal value are within the scope of safe temperature and pressure, if having met or exceeded safety
Temperature and pressure range, the temperature detection signal value and pressure detecting signal value that also will test immediately are sent to server.
The index for judging high pressure oil immersion operation of current transformers exception is increased, evaluation can be more fully made, discovery is high in time
Whether pressure oil-immersed current transformer breaks down.
Preferably, signal processing unit includes filter and analog-digital converter；Filter is used for temperature sensor and pressure
The temperature detection and pressure detecting signal that force snesor detects in high pressure oil immersion current transformer are filtered；Mould
Number converter is used to the filter filtering temperature detection signal that treated simulates and pressure detecting signal being converted to number
Temperature detection signal and pressure detecting signal.Detection signal is filtered by filter, preferably detection letter can be obtained
Number, to obtain more accurate temperature information, pressure information, to make more accurate breakdown judge.
Preferably, temperature, pressure detection unit further includes density of hydrogen measurement module, the connection filter of density of hydrogen measurement module
Wave device is sent to filter for detecting density of hydrogen signal in high pressure oil immersion current transformer, and by density of hydrogen signal.
High pressure oil immersion current transformer using oil insulate to coil, heat and electricity under the action of can gradually aging and decomposition, produce
Raw a small amount of various low molecular hydrocarbons and CO, CO2Equal gases.These gases largely dissolve in the oil, when failure generates, just
It can accelerate the generation speed of these gases, and constantly cause internal pressure to increase in spillage oil, so as to cause explosion, and H2It is to set
Gas that is earliest in standby appearance electric discharge (partial discharge, spark, electric arc) and thermal decomposition process, most easily producing.It is dense by setting hydrogen
Degree measurement module whether have hydrogen generation inside detection device, can find discharge fault more in time.
Preferably, pressure sensor is the piezoresistive silicon sensor of 316L stainless steel encapsulation.
Preferably, density of hydrogen measurement module is solid-state palldium alloy thin film sensor.
Preferably, wireless sensing device is set as being mounted on the sampling valve plug of high pressure oil immersion current transformer bottom, packet
Include upper casing, sealing ring, the pcb board for being set as sensor main control unit, signal processing unit, lower casing, temperature sensor, silicon pressure drag
Formula sensor, solid-state palldium alloy thin film sensor and with outer-hexagonal plug, pcb board and signal processing unit pass through sealing ring seal
It is fixed between upper casing and lower casing, temperature sensor, piezoresistive silicon sensor and solid-state palldium alloy thin film sensor pass through screw thread
Connecting band outer-hexagonal plug, band outer-hexagonal plug is for being tightened to sampling valve aperture of door.By by wireless sensing device and
Sample cock plug integrated design, it may not be necessary in addition design installation site on high pressure oil immersion current transformer, also be not required to
In addition it to be routed, do not destory the scene equipment, and installation is simple, convenient disassembly.
Preferably, wireless sensing device is set as being mounted on the oil filler plug in metal expander, including upper casing, sealing ring,
It is set as pcb board, signal processing unit, lower casing, temperature sensor, the piezoresistive silicon sensor, solid-state of sensor main control unit
Palldium alloy thin film sensor and with outer-hexagonal plug, pcb board is fixed between upper casing and lower casing by sealing ring sealing, and temperature passes
Sensor, piezoresistive silicon sensor and solid-state palldium alloy thin film sensor are connected through a screw thread band outer-hexagonal plug, and band outer-hexagonal is stifled
Head is for being tightened to oil filler point.By the way that wireless sensing device and sampling oil filler plug are integrally designed, it may not be necessary to
Installation site is in addition designed on high pressure oil immersion current transformer, does not also need in addition to be routed, do not destory the scene equipment, installation letter
It is single, convenient disassembly.
The utility model embodiment also provides a kind of wireless detecting system, including such as above-mentioned wireless sensing device, also wraps
Include wireless receiving converter, wireless relay apparatus, radio network gateway, serial server and display module；
Wireless receiving converter receives the first mode wireless signal that radio receiving transmitting module is sent, and is converted to second mode
Wireless signal is simultaneously sent to wireless relay apparatus；
Wireless relay apparatus receives the second mode wireless signal that wireless receiving converter is sent, and is sent to wireless network
It closes；
Radio network gateway connects serial server by serial port data line, and serial server connects the display module.
Wireless detecting system provided by the embodiment of the utility model is examined applied to high pressure oil immersion current transformer
It surveys, it can be with real-time detection to find whether break down in current transformer in time, to overcome existing detection device cannot
Detection in time, but will be when deformation occurs just recognizes and have occurred that failure for metal expander.Meanwhile it is wireless by being arranged
Temperature detection signal value and pressure detecting signal value are transferred to server by transceiver module, do not need to arrange personnel that scene is gone to patrol again
Inspection, both saves manpower, also improves efficiency.
It preferably, further include wireless router and handheld terminal, serial server connects the hand by wireless router
Hold terminal.Serial server can by wireless router by the temperature information of high pressure oil immersion current transformer, pressure information,
Hydrogen content information is forwarded to handheld terminal, such as mobile phone by wireless router, can be convenient staff in a certain range
The case where relevant information can be received, conveniently notify staff's equipment in time, and when situation occurs in equipment, facilitate work
The timely handling failure of personnel.
Detailed description of the invention
Fig. 1 is wireless sensing device structural schematic diagram in the utility model embodiment 1；
Fig. 2 is wireless sensing device preferred embodiment structural schematic diagram in the utility model embodiment 1；
Utility model Fig. 3 is that wireless sensing device is set as sample cock plug or oiling in the utility model embodiment 1
Plug structure schematic diagram；
Fig. 4 is wireless detecting system preferred embodiment structural schematic diagram in the utility model embodiment 2.
In attached drawing: 100, wireless sensing device；110, temperature sensor；120, pressure sensor；130, signal processing list
Member；131, filter；132, analog-digital converter；140, sensor main control unit；141, memory；142, processor；150, nothing
Line transceiver module；160, power module；210, display module；220, radio network gateway；230, serial server；310, upper casing；
320, sealing ring；330, lower casing；340, band outer-hexagonal plug；410, wireless receiving converter；420, wireless relay apparatus；430,
Wireless router；440, handheld terminal.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the utility model, it should be noted that
Under the premise of not colliding, it can be formed in any combination between various embodiments described below or between each technical characteristic new
Embodiment.
Embodiment 1:
As shown in Figure 1 and Figure 2, a kind of wireless sensing device 100 provided by the embodiment of the utility model is applied to high pressure
Oil-immersed current transformer is detected, including temperature sensor 110, pressure sensor 120, signal processing unit 130, sensing
Device main control unit 140 and radio receiving transmitting module 150, temperature sensor 110 and pressure sensor 120 are separately connected signal processing list
Member 130, signal processing unit 130 connect sensor main control unit 140, and sensor main control unit 140 connects radio receiving transmitting module
150；
Temperature sensor 110 is used for the temperature that the temperature in high pressure oil immersion current transformer is detected and be will test
Degree detection signal is sent to signal processing unit 130；
Pressure sensor 120 is used for the pressure that the pressure in high pressure oil immersion current transformer is detected and be will test
Power detection signal is sent to signal processing unit 130；
Signal processing unit 130 is used to handle temperature detection signal and pressure detecting signal, and by treated
Temperature detection signal value and pressure detecting signal value are sent to sensor main control unit 140；
Sensor main control unit 140 is for receiving through treated temperature detection signal value and the pressure of signal processing unit 130
Power detected signal value, and sent by radio receiving transmitting module 150.
Radio receiving transmitting module 150 can be communicated by existing cordless communication network, such as GPRS network, GSM network, CDMA
Network, 3G, 4G network send transmission temperature detection signal value and pressure detecting signal value, with the development of network technology, after
Can also using 5G network implementations communicate, mainly by be arranged on radio receiving transmitting module 150 corresponding network communication module come
It realizes.Radio receiving transmitting module 150 can also transmit temperature detection signal value and pressure detecting signal by other communication networks
Value, such as WIFI, Zigbee.
Under normal circumstances, since temperature change oily in high pressure oil immersion current transformer can make volume change, from
And internal pressure is caused to change, this variation range is smaller, generally ± 10Kpa or so, so basic place inside current transformer
In micro-positive pressure or tiny structure.Wireless sensing device 100 provided by the embodiment of the utility model, real-time measurement high pressure oil immersion electric current
Temperature detection signal value and detected signal value are uploaded to server by wireless signal and carried out by the pressure and temperature in mutual inductor
It shows on the spot or upload the data to backstage again and show.After receiving data, it can judge whether equipment goes out by temperature height
Show failure and cause to generate heat, judges whether equipment bulk gas or oil leak situation occurs by pressure size.I.e. this is practical new
Type provide wireless sensing device 100, can with real-time detection to find whether break down in current transformer in time, thus
Overcome existing detection device that cannot detect in time, but will when metal expander deformation occurs just recognize have occurred that it is former
Barrier.Meanwhile temperature detection signal value and pressure detecting signal value are transferred to by server by setting radio receiving transmitting module 150,
It does not need that personnel is arranged to go live inspection again, both saves manpower, also improve efficiency.
Signal processing unit 130 includes filter 131 and analog-digital converter 132；Filter 131 is used for temperature sensor
110 and the temperature detection in the high pressure oil immersion current transformer that detects of pressure sensor 120 and pressure detecting signal carry out
Filtering processing；Analog-digital converter 132 is used for the temperature detection signal and pressure detecting of the simulation after the filtering processing of filter 131
Signal is converted to the temperature detection signal and pressure detecting signal of number.It is filtered by 131 pairs of detection signals of filter, it can
Sentenced with obtaining preferably detection signal to obtain more accurate temperature information, pressure information to make more accurate failure
It is disconnected.
Wherein, pressure sensor 120 uses the piezoresistive silicon sensor of 316L stainless steel encapsulation to utility model utility model,
The pressure for being applied to 316L stainless steel membrane on piece is conducted by silicone oil to pressure element.Temperature sensor 110 and pressure sensor
120 can integrate and be wholely set, and sensor main control unit 140 obtains temperature detection signal value by ADC (analog-digital converter 132)
With acquisition pressure detecting signal value, sensor main control unit 140 calculates target pressure value and temperature by software mean filter
Value.
As described in Figure 2, in a kind of preferred embodiment of wireless sensing device 100 provided by the utility model, further include
Power module 160, power module 160 connect sensor main control unit 140, and sensor main control unit 140 is connected by IO1 interface
Temperature sensor 110, sensor main control unit 140 connect pressure sensor 120, sensor main control unit 140 by IO2 interface
110 data acquisition port of temperature sensor and the acquisition of 120 data of pressure sensor are separately connected by the connection of signal processing unit 130
Mouthful.Power supply, such as battery, lithium battery are provided by setting power module 160, it can be by power supply and wireless sensing device 100
Setting is integral, does not need still further to provide route offer power supply, that is, does not need still further to be routed on high-tension apparatus, Ke Yiti
For the safety of device, while being also more convenient the installation of device.
Wherein, sensor main control unit 140 includes memory 141 and processor 142, and memory 141 is stored with executable
The temperature detection data and pressure sensor 120 that computer program and temperature sensor 110 detect detect pressure detecting number
According to processor 142 is for calling the computer executable program stored in memory 141 and realizing following method for managing power supply:
Data acquire energizing step: when the preset data acquisition intervals time arrives, passing through IO1 interface and IO2 interface
High level is sent to temperature sensor 110 and pressure sensor 120, temperature sensor 110 is opened and pressure sensor 120 acquires
The supply port of data；And receiving the temperature detection signal and pressure that temperature sensor 110 and pressure sensor 120 detect
When power detects signal, low level is sent to temperature sensor 110 and pressure sensor 120 by IO1 interface and IO2 interface, is closed
It closes the temperature sensor 110 and pressure sensor 120 acquires the supply port of data；The preset data acquisition intervals time can
To be set as needed, such as it is set as 10 seconds.
Data processing energizing step: call last time for storing detects in memory 141 temperature detection signal value and
Pressure detecting signal value calculates between just collected temperature detection signal value and last collected temperature detection signal value
Temperature detection signal changing value and just between collected pressure detecting signal value and last acquisition pressure detecting signal value
Pressure detecting signal changing value, and judge whether temperature detection signal changing value is less than preset temperature change threshold value, simultaneously
Judge whether pressure detecting signal changing value is less than preset pressure change threshold value, if so, control sensor main control unit 140
Into low-power consumption mode, if wherein temperature detection signal changing value or pressure detecting signal changing value any one of
Greater than change threshold, the temperature detection signal value just detected and pressure detecting letter are sent by radio receiving transmitting module 150 immediately
Number value.
Wherein, temperature detection signal changing value is used to characterize the situation of change of temperature, is set as Δ T, Δ T is bigger, illustrates temperature
Degree transformation is fiercer, is more than certain temperature change threshold, illustrates there is accident in current transformer, such as set temperature change threshold value
It is 5 DEG C, when Δ T >=5 DEG C, it is necessary to which the temperature detection signal value that will test immediately is sent to server；Similarly, pressure is examined
Pressure changing or oil pressure situation of change that signal intensity value is used to characterize the gas of generation are surveyed, is set as Δ P, Δ P is got over
Greatly, illustrate that the oil in the gas generated in same time substantial increase or current transformer significantly reduces, be more than certain
Pressure change threshold value illustrates there is accident in current transformer, or oil leak has occurred.Such as set pressure change threshold value as
10KPa, as Δ P >=10KPa, it is necessary to which the pressure detecting signal value that will test immediately is sent to server.
Sensor main control unit 140 is passed by the power supply management to temperature sensor 110, pressure sensor 120 in temperature
When sensor 110 and pressure sensor 120 do not need to carry out data acquisition, supply port is disconnected, electric energy can be saved.Pass through simultaneously
The frequency that data are sent is controlled, when not needing to handle and send data, whole device is in low-power consumption mode, can be with maximum limit
Surely electric energy is saved, so that power module 160, as the electricity in battery, lithium battery can guarantee that wireless sensing device 100 exists
High pressure oil immersion current transformer whole life cycle carries out temperature and pressure detection and does not all need in addition to replace battery.
Wherein, data processing energizing step further include: when judge temperature detection signal changing value less than preset temperature become
Change threshold value, and pressure detecting signal changing value be less than preset pressure change threshold value when, then judge whether to data send between
Every the time, if having arrived data transmission interval time, just collected temperature detection signal value and pressure detecting signal value are sent, it is no
Then, into low-power consumption mode.Data transmission interval time can according to need setting, and the present embodiment is set as 10 minutes, passes through
Data transmission interval time is set, may remain in collected temperature detection signal value and pressure detecting in the regular hour
Signal value is sent to server, to facilitate server staff to check, while server being facilitated to save relevant historical data,
And it can be by being changed trend analysis processing to the historical data of preservation, to analyze the work of high pressure oil immersion current transformer
Make state.
Wherein, data processing energizing step is judging whether to before data transmission interval time, further includes:
Judge just whether collected temperature detection signal value is less than preset temperature threshold, and just collected pressure inspection
It surveys whether signal value is less than preset first pressure threshold value, or is greater than preset second pressure threshold value, if it is, continuing to sentence
It is disconnected whether to arrive data transmission interval time, otherwise, just collected temperature detection signal value and the pressure detecting are sent immediately
Signal value.Wherein preset temperature threshold is dangerous temperature value, illustrates that temperature is too high higher than this temperature, failure or few occurs
Whether oil, first pressure threshold value are the first safe pressure value, for characterizing in current transformer because a large amount of gas of accident generation occur
Body illustrates to produce a large amount of gas in equipment, there is accident hair if pressure detecting signal value is greater than the first safe pressure value
It is raw；Second pressure threshold value is the second safe pressure value, for characterize equipment whether oil leak, if pressure detecting signal value is less than the
Two pressure thresholds illustrate that oil accident has occurred in current transformer.In addition to comparing transformed value, also compare the temperature inspection detected
Whether survey signal value and pressure detecting signal value are within the scope of safe temperature and pressure, if having met or exceeded safety
Temperature and pressure range, the temperature detection signal value and pressure detecting signal value that also will test immediately are sent to server.
The index for judging high pressure oil immersion operation of current transformers exception is increased, evaluation can be more fully made, discovery is high in time
Whether pressure oil-immersed current transformer breaks down.
By being managed to battery, battery power can be greatly saved.1) temperature collection sensor 110 and pressure pass
Electric current and time when sensor 120: acquisition in 1.4mA, 10ms, 10 seconds is primary, average current 1.4uA；2) sensor master control list
140 processing data of member and time and the electric current for sending data consumption: it sends once within 32mA, 34ms, 10 minutes, average current is
1.8uA。
The utility model is calculated using lithium battery service life: in standby mode (140 suspend mode of sensor main control unit, temperature
It is idle to spend sensor 110 and the power-off of pressure sensor 120, radio receiving transmitting module 150) under electric current only 1uA, temperature collection sensor
110 and 120 data of pressure sensor and processing data only need electric current 1.4mA, time 10ms, acquisition in 10 seconds is primary, average current
Only 1.4uA, electric current 32mA, time 34ms when radio receiving transmitting module 150 sends data are sent primary for normal mode lower 10 minutes
Data, data include that data, the average currents such as temperature detection signal value, pressure detecting signal value, cell voltage, transmission times are
1.8uA, average current when whole device works is only 4.2uA.It is powered based on ultralow Consumption using battery (550mAh)
The service life of mode device can reach 10 years or more.The service life of current transformer is generally 8 years, and the present apparatus is used in electric current
Requirement is able to satisfy on mutual inductor completely.
It further include density of hydrogen measurement module in a kind of preferred embodiment provided by the utility model, density of hydrogen is surveyed
It measures module and connects filter 131, for detecting density of hydrogen signal in high pressure oil immersion current transformer, and density of hydrogen is believed
Number it is sent to filter 131.High pressure oil immersion current transformer insulate to coil using oil, meeting under the action of heat and electricity
Gradually aging and decomposition generate the gases such as a small amount of various low molecular hydrocarbons and CO, CO2.These gases are largely dissolved in oil
In, when failure generates, the generation speed of these gases will be accelerated, and constantly cause internal pressure to increase in spillage oil, from
And it sets off an explosion.And H2Be equipment occur in electric discharge (partial discharge, spark, electric arc) and thermal decomposition process it is earliest, most easily produce
Gas.Whether there is hydrogen generation inside detection device by setting density of hydrogen measurement module, can find to put more in time
Electric fault.
Density of hydrogen measurement module uses solid-state palldium alloy film-sensing technology, and solid-state palldium alloy thin film sensor uses
A kind of novel sensitive thin film is made in the materials such as Pd-Ni alloy, based on palladium to the specificity Catalysis Principles of H2, when in detection environment
There are H2When, H2Molecule is catalyzed into H atom, is adsorbed in the lattice of Pd-Ni alloy, causes resistance variations, then by matched
Signal processing circuit, sensor main control unit 140 is by acquisition ADC treated signal, then will collect signal and be converted to H2
Concentration, to realize H2Measurement.
In a kind of preferred embodiment of the present embodiment, as shown in figure 3, wireless sensing device 100 is set as being mounted on height
The sampling valve plug of oil-immersed current transformer bottom is pressed, including upper casing 310, sealing ring 320, is set as sensor main control unit
140 pcb board, signal processing unit 130, lower casing 330, temperature sensor 110, piezoresistive silicon sensor, solid-state palldium alloy are thin
Film sensors and with outer-hexagonal plug 340, pcb board and signal processing unit 130 are fixed on upper casing by the sealing of sealing ring 320
Between 310 and lower casing 330, temperature sensor 110, piezoresistive silicon sensor and solid-state palldium alloy thin film sensor are connected by screw thread
Tape splicing outer-hexagonal plug 340, band outer-hexagonal plug 340 is for being tightened to sampling valve aperture of door.By the way that wireless sensing is filled
Set 100 and sample cock plug integrated design, it may not be necessary to installation site is in addition designed on high pressure oil immersion current transformer,
It does not need in addition to be routed, do not destory the scene equipment, and installation is simple, convenient disassembly yet.
Wireless sensing device 100 may be set to be the oil filler plug being mounted in metal expander, including upper casing 310, close
Seal 320, the pcb board for being set as sensor main control unit 140, signal processing unit 130, lower casing 330, temperature sensor 110,
Piezoresistive silicon sensor, solid-state palldium alloy thin film sensor and with outer-hexagonal plug 340, pcb board and signal processing unit 130 are logical
It crosses the sealing of sealing ring 320 to be fixed between upper casing 310 and lower casing 330, temperature sensor 110, piezoresistive silicon sensor and solid-state
Palldium alloy thin film sensor is connected through a screw thread band outer-hexagonal plug 340, and band outer-hexagonal plug 340 is for being tightened to oiling
Kong Shang.The wireless sensing device 100 of the utility model is mounted in the metal expander above oil-immersed current transformer, is taken
For original oil filler plug.On the one hand piezoresistive silicon sensor passes through the temperature of the gas in 316 stainless steel direct metal expanders.
On the other hand, in the case where few oil, the volume in metal expander be will increase, when there is not partial discharge generation gas, gas
Body pressure can be reduced, and the case where negative pressure occur, oil amount determination can also be reduced simultaneously according to measurement gas pressure.Density of hydrogen measurement
Module can measure H in mutual inductor internal gas2Concentration, pass through gas temperature increase, pressure increase and H2Concentration judges that equipment can
Can occur discharging and overheat leads to internal generation bulk gas.By the way that wireless sensing device 100 and sampling oil filler plug are integrally set
Meter, it may not be necessary in addition design installation site on high pressure oil immersion current transformer, also not need in addition to be routed, not destroy
Field device, installation is simple, convenient disassembly.
Embodiment 2:
As shown in figure 4, the utility model embodiment provides a kind of wireless detecting system, the wireless biography including such as embodiment 1
Induction device 100 further includes wireless receiving converter 410, wireless relay apparatus 420, radio network gateway 220,230 and of serial server
Display module 210；
Wireless receiving converter connects the first mode wireless signal of 410 receipts radio receiving transmitting modules 150 transmission, and is converted to the
Two modes wireless signal is simultaneously sent to wireless relay apparatus 420；
Wireless relay apparatus 420 receives the second mode wireless signal that wireless receiving converter 410 is sent, and is sent to nothing
Gauze closes 220；
Radio network gateway 220 connects serial server 230 by serial port data line, and serial server 230 connects the display
Module 210.
Wireless detecting system provided by the embodiment of the utility model is examined applied to high pressure oil immersion current transformer
It surveys, it can be with real-time detection to find whether break down in current transformer in time, to overcome existing detection device cannot
Detection in time, but will be when deformation occurs just recognizes and have occurred that failure for metal expander.Meanwhile it is wireless by being arranged
Temperature detection signal value and pressure detecting signal value are transferred to server by transceiver module 150, do not need that personnel is arranged to go now again
Field inspection, both saves manpower, also improves efficiency.
Wireless receiving converter 410 receives the first mode wireless signal that radio receiving transmitting module 150 is sent, and is converted to nothing
Gauze closes 220 receivable second mode wireless signals and is sent to radio network gateway 220.By the way that wireless receiving converter is arranged
410, it may be convenient to realize the wireless communication between radio receiving transmitting module 150 and radio network gateway 220, avoid radio receiving transmitting module
Between 150 and radio network gateway 220 because signal mode it is inconsistent caused by communication issue.I.e. radio receiving transmitting module 150 can root
According to needing to select suitable first mode wireless signal, radio network gateway 220 also can according to need setting second mode wireless communication
Number.Increase the use scope of system.As radio receiving transmitting module 150 can be transferred data to by the Radio Link of 433MHz
Wireless receiving converter 410, wireless receiving converter 410 again by other network formats, as GPRS network, GSM network,
Cdma network, 3G, 4G network or MESH network are sent to radio network gateway 220.
Wireless signal after conversion can be conveyed directly to radio network gateway by MESH network by wireless receiving converter 410
220.In a kind of preferred embodiment, wireless receiving converter 410 is passed through the wireless signal after conversion by MESH network
Wireless relay apparatus 420 transmits.The distance that utility model wireless relay apparatus 420 can according to need transmission is configured,
It can achieve 500 meters by the single-stage transmission range of MESH network, at most can be set to relay by eight times, that is, be arranged eight
Wireless relay apparatus 420.After wireless relay apparatus 420 is received and forwarded by signal, it is finally sent to radio network gateway 220,
Radio network gateway 220 is connected to serial server 230 by RS485 serial port data line or Ethernet data line.Serial server
230 send data to display module 210 again is shown.Display module 210 can make computer terminal, can also make liquid crystal
Show device either liquid crystal curtain wall.
Serial server 230 is by temperature information, pressure information, density of hydrogen information and preset temperature threshold, pressure threshold
Value and density of hydrogen threshold value comparison, if temperature information is greater than temperature threshold and/or the pressure information value is greater than preset first
Pressure threshold is perhaps less than preset second pressure threshold value or density of hydrogen information is greater than density of hydrogen threshold value, then issues report
Alert information.
Operational system can also be set on computer terminal, what operational system storage and display serial server 230 were read
Data, it is dense by comparing temperature information, pressure information, hydrogen by setting temperature threshold, pressure threshold and density of hydrogen threshold value
Degree information and the size of preset temperature threshold, pressure threshold and density of hydrogen threshold value carry out analyzing and diagnosing output diagnostic result.Its
The process compared can be such that
Conditions for diagnostics sets a temperature alarming value T, sets air pressure upper limit value Pgh, sets air pressure lower limit value Pgl, setting
Oil pressure lower limit value Pol.
Temperature is excessively high: when equipment failure adstante febre, wireless sensing device 100 transfers out collected temperature
Afterwards, operational system obtains [high temperature] failure by judging that temperature is higher than setting temperature upper limit；
Air pressure is excessively high: when occurring overheat electric discharge or partial discharge inside equipment, can generate bulk gas, gas concentrates on gold
Belonging to air pressure in expander will increase, and operational system receives atmospheric pressure value and atmospherically obtains [air pressure is high] failure in limited time greater than setting；
Oil pressure is too low: pressure sensor 120 is mounted in the oil filler plug position of high pressure oil immersion current transformer bottom, according to pressure
Strong formula P=ρ gh, after there is few oil, oily depth h can be reduced, and other parameters are constant, and corresponding pressure can reduce, and work as pressure
It can determine whether the case where [few oil] occur when force value is lower than setting oil pressure lower limit
Air pressure is too low: when there is few oily situation, the gas in metal expander is constant, and volume increases, and air pressure can reduce,
The case where [few oil] can also be obtained when by judging that air pressure is crossed lower than air pressure lower limit, carries out dual judgement.
It further include alarm in a kind of preferred embodiment, alarm connects serial server 230, for receiving string
The alarm signal of mouthful server 230, and make a sound or light warning signal, sound and light warning letter can also be simultaneously emitted by
Number.By the way that alarm is arranged, can have in serial server 230 by comparing discovery temperature, pressure or hydrogen information alert
When failure occurs, alarm signal is issued by alarm, to remind relevant staff to carry out troubleshooting.
Wireless router 430 and handheld terminal 440 can also be set, and serial server 230 is connected by wireless router 430
Connect handheld terminal 440.Serial server 230 can be by wireless router 430 by the temperature of high pressure oil immersion current transformer
Information, pressure information, hydrogen content information are forwarded to handheld terminal 440 by wireless router 430, such as mobile phone, tablet computer
Or the handheld monitor terminal specially designed.Can be convenient staff can receive relevant information in a certain range, side
Just the case where notifying staff's equipment in time, and when situation occurs in equipment, facilitate the timely handling failure of staff.
Above embodiment is only preferred embodiments of the present invention, cannot be protected with this to limit the utility model
Range, the variation of any unsubstantiality that those skilled in the art is done on the basis of the utility model and replacement belong to
In the utility model range claimed.
Claims (10)
1. a kind of wireless sensing device is detected applied to high pressure oil immersion current transformer, which is characterized in that including temperature
Spend sensor, pressure sensor, signal processing unit, sensor main control unit and radio receiving transmitting module, the temperature sensor
It is separately connected the signal processing unit with pressure sensor, the signal processing unit connects sensor main control unit, described
Sensor main control unit connects radio receiving transmitting module；
The temperature sensor is used for the temperature that the temperature in high pressure oil immersion current transformer is detected and be will test
Detection signal is sent to the signal processing unit；
The pressure sensor is used for the pressure that the pressure in high pressure oil immersion current transformer is detected and be will test
Detection signal is sent to the signal processing unit；
The signal processing unit, and will treated temperature for handling temperature detection signal and pressure detecting signal
Detected signal value and pressure detecting signal value are sent to sensor main control unit；
The sensor main control unit is for receiving temperature detection signal value and pressure detecting after signal processing unit processes
Signal value, and sent by radio receiving transmitting module.
2. device as described in claim 1, which is characterized in that further include power module, the power module connects the biography
Sensor main control unit, the sensor main control unit connect the temperature sensor, the sensor master control list by IO1 interface
Member connects the pressure sensor by IO2 interface, and the sensor main control unit is connected respectively by the signal processing unit
Jointing temp sensor data acquisition mouth and pressure sensor data acquisition port.
3. device as claimed in claim 2, which is characterized in that the signal processing unit includes filter and analog-to-digital conversion
Device；
The temperature in high pressure oil immersion current transformer that the filter is used to detect temperature sensor and pressure sensor
Degree detection signal and pressure detecting signal are filtered；
The analog-digital converter is used to turn the filter filtering temperature detection signal that treated simulates and pressure detecting signal
It is changed to the temperature detection signal and pressure detecting signal of number.
4. device as claimed in claim 3, which is characterized in that further include density of hydrogen measurement module, density of hydrogen measures mould
Block connects filter, sends for detecting density of hydrogen signal in high pressure oil immersion current transformer, and by density of hydrogen signal
To filter.
5. device as claimed in claim 4, which is characterized in that the pressure sensor is the silicon pressure drag of 316L stainless steel encapsulation
Formula sensor.
6. device as claimed in claim 4, which is characterized in that the density of hydrogen measurement module is solid-state palldium alloy film biography
Sensor.
7. such as device as claimed in any one of claims 1 to 6, which is characterized in that the wireless sensing device is set as being mounted on
The sampling valve plug of high pressure oil immersion current transformer bottom, including upper casing, sealing ring, the PCB for being set as sensor main control unit
Plate, signal processing unit, lower casing, temperature sensor, pressure sensor and with outer-hexagonal plug, the pcb board and signal processing
Unit is fixed between the upper casing and lower casing by sealing ring sealing, and the temperature sensor and pressure sensor pass through screw thread
The band outer-hexagonal plug is connected, the band outer-hexagonal plug is for being tightened to sampling valve aperture of door.
8. such as device as claimed in any one of claims 1 to 6, which is characterized in that the wireless sensing device is set as being mounted on
Oil filler plug in metal expander, including upper casing, sealing ring, the pcb board for being set as sensor main control unit, signal processing list
Member, lower casing, temperature sensor, pressure sensor and with outer-hexagonal plug, the pcb board and signal processing unit pass through sealing ring
Sealing is fixed between the upper casing and lower casing, and the temperature sensor and pressure sensor are connected through a screw thread the band outer six
Angle plug, the band outer-hexagonal plug is for being tightened to oil filler point.
9. a kind of wireless detecting system is detected applied to high pressure oil immersion current transformer, which is characterized in that including such as
Any wireless sensing device of claim 1 to 8, further includes wireless receiving converter, wireless relay apparatus, wireless network
Pass, serial server and display module；
The wireless receiving converter receives the first mode wireless signal that radio receiving transmitting module is sent, and is converted to second mode
Wireless signal is simultaneously sent to the wireless relay apparatus；
The wireless relay apparatus receives the second mode wireless signal that the wireless receiving converter is sent, and is sent to described
Radio network gateway；
The radio network gateway connects the serial server by serial port data line, and the serial server connects the display mould
Block.
10. system as claimed in claim 9, which is characterized in that further include wireless router and handheld terminal, the serial ports clothes
Business device connects the handheld terminal by the wireless router.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820374052.9U CN208847830U (en) | 2018-03-19 | 2018-03-19 | A kind of wireless sensor device and wireless detecting system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820374052.9U CN208847830U (en) | 2018-03-19 | 2018-03-19 | A kind of wireless sensor device and wireless detecting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318849A (en) * | 2018-03-19 | 2018-07-24 | 国网新疆电力有限公司 | A kind of wireless sensor device and wireless detecting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318849A (en) * | 2018-03-19 | 2018-07-24 | 国网新疆电力有限公司 | A kind of wireless sensor device and wireless detecting system |
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