CN104460606B - Electricity distribution power transformator remote monitoring system and method - Google Patents
Electricity distribution power transformator remote monitoring system and method Download PDFInfo
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- CN104460606B CN104460606B CN201410648182.3A CN201410648182A CN104460606B CN 104460606 B CN104460606 B CN 104460606B CN 201410648182 A CN201410648182 A CN 201410648182A CN 104460606 B CN104460606 B CN 104460606B
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
Electricity distribution power transformator remote monitoring system, including detection device, long-distance monitorng device, wireless sensor network apparatus and mobile communications device, wherein detection device include current sensing means, temperature-detecting device；The electric current of current sensing means detection electricity distribution power transformer simultaneously sends detection signal to wireless sensor network apparatus, the temperature of temperature-detecting device detection electricity distribution power transformer simultaneously sends detection signal to wireless sensor network apparatus, and above-mentioned current detection signal and/or temperature detection signal are converted to Digital Detecting value and are sent by mobile communications device to long-distance monitorng device by wireless sensor network apparatus；Long-distance monitorng device receives the above-mentioned detected value that mobile communications device is sent and sends control command to wireless sensor network apparatus by mobile communications device, to control the switch of the switch of transformer output and/or transformer cooling fan.The present invention realizes the effect for preventing that the spontaneous combustion of transformer from bursting.
Description
Technical field
The present invention relates to a kind of electricity distribution power transformator remote monitoring system, especially a kind of wireless sensor network is matched somebody with somebody
Electric power transformer remote monitoring system.
Background technology
Electricity distribution power transformer be a kind of alternating voltage (electric current) by a certain numerical value become the identical another kind of frequency or
The equipment of the different voltage of several numerical value (electric current).Its internal insulating cell and stent, mostly using paper, cotton yarn, cloth, timber
Deng combustable organic material, and there is substantial amounts of insulating oil.Therefore, its fire risk is easy firing, and transformer is located always
Service life can be reduced in overload, and internal temperature can be made excessive, flammable insulating materials and insulating oil can divide at high temperature
Solution burning, and produces a large amount of gases, sharply increases the pressure of inside transformer, causes rupture of case, a large amount of oil spouts, burning
Oil stream further expands fire hazard, and causes large-area power-cuts, influences normally production and life.The present invention passes through end
End node monitors the temperature and electric current of electricity distribution power transformer in real time, and when more than warning value, temperature or current value are passed through
Wireless sensor network and mobile communications network are transferred to long-range host computer.Terminal node can be right under the control of host computer
Electricity distribution power transformer takes corresponding output control, prevents the spontaneous combustion of transformer from bursting, reduces the generation of accident.
The content of the invention
The purpose of the present invention is：It is proposed a kind of electricity distribution power transformer remote monitoring system based on wireless sensor network
System, the system can monitor long-range transformer temperature in real time with electric current by host computer, when transformer occurs abnormal, energy
Enough carry out remote handle control or automatically control, it can solve to prevent the spontaneous combustion of transformer from bursting, and reduce the generation of accident
The problem of.
To realize the purpose of the present invention, it is achieved using following technical scheme：
A kind of electricity distribution power transformator remote monitoring system, including detection device, long-distance monitorng device, wireless sensor network
Network device and mobile communications device, wherein detection device include：Current sensing means, temperature-detecting device；
It is characterized in that：
The electric current of current sensing means detection electricity distribution power transformer simultaneously sends detection signal to wireless sensor network
Device, the temperature of temperature-detecting device detection electricity distribution power transformer simultaneously send detection signal to wireless sensor network dress
Put, above-mentioned current detection signal and/or temperature detection signal are converted to Digital Detecting value and led to by wireless sensor network apparatus
Mobile communications device is crossed to send to long-distance monitorng device；
Long-distance monitorng device receives the above-mentioned detected value sent of mobile communications device and by mobile communications device to wireless
Sensor network apparatus sends control command, to control the switch of the switch of transformer output and/or transformer cooling fan.
Electricity distribution power transformator remote monitoring system as described above, it is characterised in that：
Current sensing means includes current transformer and current transducer signal modulate circuit, and wherein current transformer is used for
The current signal of transformer output stage is gathered, above-mentioned current signal is converted into voltage by current transducer signal modulate circuit to be believed
Number；
Temperature-detecting device includes temperature sensor and temperature sensor signal modulate circuit, and wherein temperature sensor gathers
Oil tank of transformer temperature, resistance change is converted to by temperature change, and temperature sensor signal modulate circuit is by temperature sensor
Resistance value be converted to voltage signal；
Wireless sensor network apparatus includes terminal node and coordinator, and terminal node is used for temperature and the data of electric current are adopted
Collection, current transducer signal modulate circuit and the transformed voltage signal of temperature sensor signal modulate circuit are AD converted
To form Digital Detecting value；Coordinator is used to terminal node and coordinator establishing wireless network.
Electricity distribution power transformator remote monitoring system as described above, it is characterised in that：Wireless sensor network apparatus pair
The Digital Detecting value is detected, when one or both therein is above warning value, by above-mentioned current digital detected value
And/or temperature digital detected value is sent to long-distance monitorng device by mobile communications device.
Electricity distribution power transformator remote monitoring system one of as described above, it is characterised in that：Long-distance monitorng device monitors
Above-mentioned electric current, temperature digital detected value, when one or both of which is constantly in higher than warning value in the given time, pass through
Mobile communications device sends the order of the switch of control transformer output and/or the switch of transformer cooling fan.
Electricity distribution power transformator remote monitoring system one of as described above, it is characterised in that：The system further includes drive
Dynamic circuit, drives cooling fan switch and transformer output switch under the control of wireless sensor network apparatus.
Electricity distribution power transformator remote monitoring system one of as described above, it is characterised in that：When the electricity of the transformer
When one of stream and temperature digital detected value obtain both over-limit condition, wireless sensor network apparatus directly disconnects transformer
Output switch.
Electricity distribution power transformator remote monitoring system one of as described above, it is characterised in that：Long-distance monitorng device will be received
The temperature and electric current centrifugal pump serialization arrived, difference real-time rendering are stored in number into temperature curve and current curve, and by data
According to storehouse.
Electricity distribution power transformator remote monitoring system one of as described above, it is characterised in that：Wireless sensor network fills
Put and use ZIGBEE modules；Mobile communications device uses GPRS module.
Electricity distribution power transformator remote monitoring system one of as described above, it is characterised in that：Long-distance monitorng device includes
Host computer and microprocessor.
It is long-range that a kind of one of described electricity distribution power transformator remote monitoring system carries out electricity distribution power transformer
The method of monitoring, it is characterised in that include the following steps：
The electric current of current sensing means detection electricity distribution power transformer simultaneously sends detection signal to wireless sensor network
Device, the temperature of temperature-detecting device detection electricity distribution power transformer simultaneously send detection signal to wireless sensor network dress
Put, above-mentioned current detection signal and/or temperature detection signal are converted to Digital Detecting value and led to by wireless sensor network apparatus
Mobile communications device is crossed to send to long-distance monitorng device；
Long-distance monitorng device receives the above-mentioned detected value sent of mobile communications device and by mobile communications device to wireless
Sensor network apparatus sends control command, to control the switch of transformer and/or transformer cooling fan.
Brief description of the drawings
Fig. 1 is the electricity distribution power transformer remote monitoring system schematic diagram of wireless sensor network of the present invention；
Fig. 2 is the signal conditioning circuit schematic diagram of temperature sensor of the present invention.
Fig. 3 is the signal conditioning circuit schematic diagram of current transformer of the present invention.
Embodiment
Fig. 1 be wireless sensor network of the present invention electricity distribution power transformer remote monitoring system schematic diagram, nothing of the present invention
The electricity distribution power transformer remote monitoring system of line sensor network includes current transformer 1, current transducer signal conditioning electricity
Road 2, temperature sensor 3, temperature sensor signal modulate circuit 4, the first drive circuit 5, the second drive circuit 6, ZIGBEE moulds
Block (7,8), GPRS communication modules 9, microprocessor 10, host computer 11 and database 12, wherein ZIGBEE modules include terminal section
Point (RFD) 7 and coordinator (FFD) 8, terminal node 7 are used for the data acquisition of temperature and electric current and are controlled accordingly, assisted
Device 8 is adjusted mainly to establish ZIGBEE networks, after terminal node adds the network of coordinator, with regard to nothing can be passed through between RFD and FFD
Gauze network carries out the mutual transmission of data.Each terminal node is responsible for temperature and the current parameters detection of transformer, actual
Upper terminal node can have multiple, and for convenience of description, the system only lists two.
First, second drive circuit 4,5 drives a relay respectively, and 4 corresponding relay of the first drive circuit is used for
The switch of transformer output is controlled, 5 corresponding relay of the second drive circuit is used for the switch for controlling transformer temperature-dropping fan.
Current transformer 1, gathers the current signal of transformer output stage U, V, W three-phase, passes through current transducer signal tune
Micro current signal is converted into voltage signal output by reason circuit 2.The microprocessor of terminal node leads to carries out AD turns by voltage signal
Change, once the current phase current of transformer is then sent on long-range by the result of conversion immediately more than the electric current warning value set
Position machine, limiting value, directly disconnects the output of transformer by drive circuit 1 if more than.Using this mode, without real-time
Current data is transmitted by GPRS network, and is simply just transmitted when more than the electric current warning value of setting, can be great
Save network, channel resource, the disposal ability of host computer can also be saved or without high performance host computer, saved into
This.
Temperature sensor 3, the temperature inside real-time measuring transformer, is being inserted into 3 at oil tank of transformer upper surface
Sensor, the output of each temperature sensor connect an IO input port of RFD, are gathered in real time by above-mentioned temperature sensor RFD
The temperature value of current transformer, once temperature has exceeded the warning value of setting, is sent on long-range by the oil temperature of transformer at once
Position machine, limiting value, directly cuts off the output of electric current by transformer if more than, if the oil temperature of transformer maintains for a long time
Between warning value and limiting value, remote monitoring center can send the temperature-dropping fan order for opening transformer, realize transformer
Cooling.Using this mode, without transmitting temperature data by GPRS network in real time, and simply in the electric current police more than setting
Just be transmitted during ring value, can greatly save network, channel resource, the disposal ability of host computer can also be saved or
Without high performance host computer, cost has been saved.
The microprocessor of ZIGBEE modules uses the CC2530 with radio-frequency enabled of TI companies, as ZIGBEE networks
Terminal node 7, it gathers the electric current of electricity distribution power transformer and temperature value in real time, and coordinator 8 has network coordination ability, multiple
Terminal node 7 and 1 coordinator 8 form star-like ZIGBEE networks, when terminal node is more and it is distant with coordinator when,
The routing node with routing function can be added and complete the data of terminal collection and being wirelessly transferred for coordinator.When temperature or electricity
When the value of stream is more than the warning value of setting, coordinator 8 is transmitted data to long-range upper by the GPRS module that is attached thereto
Machine, after host computer receives data, real-time display.
The data of coordinator 8 are transferred to long-range monitoring center by GPRS network, and GPRS communication modules use GR47 simultaneously
And SIM card is equipped with to realize.Transformer field and remote monitoring center use a GPRS communication module respectively.In remote monitoring
The GPRS communication modules of the heart are connected by microprocessor with computer.
Host computer 11 can carry database 12, can store the data of the electric current collected and temperature, conveniently look into
Ask the operating condition of transformer.
Temperature sensor 3 uses WZP type platinum resistance temperature sensor Pt1000, its linearity is good, during measurement, is directly inserted into
Oil tank of transformer upper surface, magnitude of voltage is converted to by temperature sensor signal modulate circuit 4 as shown in Figure 2 by resistance value.
Wherein capacitance C is noise reduction capacitor, actual value 0.1uF, and MAX6025 can be used to provide the reference voltage of 2.5V.Amplifier OP1 groups
Into the feedback resistance of sign-changing amplifier replaced with Pt, realize that constant-current source exports, ensure with temperature change the change of Pt values when, it is defeated
Go out the change of voltage linear, prime amplifier is exported again anti-phase amplification and exported by amplifier OP2, and it is defeated to become satisfactory voltage
Go out.Before actual temperature test, it is necessary first to returned to zero and adjusted and is full.Pt1000 is replaced to be connected to accurate adjustable resistance
In circuit, change its resistance value, 1000 Europe of equivalent resistance of Pt when making it be 0 DEG C, then adjusts R6 until the output of OP1 is 0.
Then accurate adjustable electric resistance value is changed, 1753.3 Europe of equivalent resistance of Pt when making it be 150 DEG C, then adjusts R6 until OP2
Output be 1500mv, complete zeroing and adjust full.The output signal of OP2 is connected to an ADC input port of CC2530, realizes AD
Conversion.
High current is transformed into low current signal by current transformer 1 using precision current transformer CT.Electricity as shown in Figure 3
D1 and D2 in current transformer signal conditioning circuit 2 are transient voltage suppressor diode, and the transient state for suppressing voltage or electric current is done
Disturb, prevent flying up for voltage and current.Prime amplifier chip is using low-power consumption, the high speed amplifier LM224D of low noise.By
In can be there are various non-linear electrical equipments, so substantial amounts of harmonic signal occurs, therefore before A/D conversions in power grid
Also need to add low-pass filter circuit.The mainly measurement to sensor change of current transducer signal modulate circuit 2 shown in Fig. 3
Signal is amplified, amplitude limit, filtering to be to facilitate A/D to change.It is positive at it using the second order active low-pass filter circuit with feedback
Input terminal has 2 RC low-pass filters, and filter effect is good compared with first-order filtering, improves the antijamming capability of system.
The analog signal of temperature sensor and current transformer by the output of respective signal conditioning circuit is input to
12 analog-digital converters of CC2530 are changed, and sampling channel is configured by the way of software configuration, determines sample sequence simultaneously
Preserve sampled result.
First and second drive circuits 5,6, are respectively adopted optocoupler and NPN type triode driving relay is realized.Optocoupler master
Be used to isolate, wherein optocoupler importation one terminate high level, one end seal in after resistance connect respectively CC2530 P1.0 and
P1.1 mouthfuls.Output par, c, a termination high level, the base stage of a termination triode, the importation of relay seals in triode
Collector.When I/O port exports low level, the conducting of optocoupler output stage, and meanwhile triode saturation conduction, the actuating of relay.Cool down wind
The output switch of machine and transformer seals in the normally opened contact of the output stage, wherein temperature-dropping fan cut-in relay of relay respectively,
The normally-closed contact of transformer output switch cut-in relay.
ZIGBEE networks between coordinator node and terminal node are realized using protocol stack Z-stack, after the power is turned on basis
Configuration in flash, is respectively set to coordinator node and terminal node.Coordinator initially sets up network, and terminal node is found
After network exists, sent to coordinator and add network request.After repeatedly request and response command, the two establishes connection, can
To pass through the ZIGBEE network traffics of formation.Since network is established by coordinator, in order to ensure the transmission of stabilization, coordinate
The power supply of device node must be stablized, and usually be subject to backup power supply.Terminal node detects electric current and temperature by the way of timing scan
The information of degree, when the value of electric current and temperature exceedes warning value, one is packaged into by ID number of the curtage value plus the node
Frame data, coordinator is sent to by ZIGBEE networks.After coordinator node receives the data of terminal node, pass through GR47 moulds
Block, sends data to long-range monitoring center.
GPRS module 9 is GR47, it has embedded ICP/IP protocol stack.The UATR3 of transformer field GR47 and coordination
The UART serial ports of device is connected, for data transfer by the way that since GR47 serial ports level is 2.7V and the serial ports level of coordinator is
3.3V, therefore changed by electrical level transferring chip MAX3372E therebetween.Data sending is being carried out using GR47 and is being connect
Before receipts, the UART1 mouths of GR47 are first passed through, it is configured using AT instructions, it is entered data pattern by command mode.
Microprocessor 10 is using the MSP430F149 microprocessors with multi-channel serial port, the UART3 of the GR47 modules of remote monitoring center
It is connected with the UART0 serial ports of microprocessor 10, for the transmission of data, turns again by MAX3372E into line level therebetween
Change.The UATR2 of microprocessor 10 is connected by MAX232 level conversions with computer serial port, realize host computer and microprocessor 10 it
Between data transfer.Before data transmit-receive is carried out using GR47, the UART1 mouths of GR47 are also first passed through, is instructed and set using AT
Device is data pattern, so as to fulfill the data transfer of transformer field and remote monitoring center.In addition GR47 modules all need to be inserted into
The SIM card opened.
Host computer is bent into temperature curve and electric current by received temperature and electric current centrifugal pump serialization, difference real-time rendering
Line, and data are stored in database.When temperature and/or electric current are constantly in higher than warning value in the given time, pass through
Host computer, which is sent, to be opened temperature-dropping fan and disconnects transformer output switch command, to protect transformer.If electric current or temperature value
Direct over-limit condition, terminal node direct action, protects transformer.
The method have the characteristics that using ZIGBEE networks and GPRS network, multiple electricity distribution power transformers can be achieved at the same time
Temperature and the long-range real-time monitoring of current value, when transformer occurs abnormal, remote handle control or automatic can be carried out
Control, prevents the spontaneous combustion of transformer from bursting, reduces the generation of accident.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (7)
1. a kind of electricity distribution power transformator remote monitoring system, including detection device, long-distance monitorng device, wireless sensor network
Device and mobile communications device, wherein detection device include：Current sensing means, temperature-detecting device；
It is characterized in that：
The electric current of current sensing means detection electricity distribution power transformer simultaneously sends detection signal to wireless sensor network apparatus,
The temperature of temperature-detecting device detection electricity distribution power transformer simultaneously sends detection signal to wireless sensor network apparatus, wirelessly
Above-mentioned current detection signal and/or temperature detection signal are converted to Digital Detecting value and by mobile logical by sensor network apparatus
T unit is sent to long-distance monitorng device；
Long-distance monitorng device receives the above-mentioned detected value sent of mobile communications device and by mobile communications device to wireless sensing
Device network equipment sends control command, to control the switch of the switch of transformer output and/or transformer cooling fan；
The wireless sensor network apparatus is detected the Digital Detecting value, and is not real-time Transmission Digital Detecting
Value, but when one or both therein is above warning value, just above-mentioned current digital detected value and/or temperature digital are examined
Measured value is sent to long-distance monitorng device by mobile communications device；
When the electric current and temperature digital detected value either or both of which over-limit condition of the transformer, wireless sensor network
Network device directly disconnects transformer output switch；
Current sensing means includes current transformer and current transducer signal modulate circuit, and wherein current transformer is used to gather
Above-mentioned current signal is converted into voltage signal by the current signal of transformer output stage, current transducer signal modulate circuit, its
Middle current transducer signal modulate circuit includes two end to end transient voltage suppressor diodes, wherein the first transient state is electric
Constrain diode processed cathode and anode be connected respectively with the anode and cathode of the second transient voltage suppressor diode, then with electric current
The output terminal of mutual inductor is connected in parallel, for suppressing the glitch of voltage or electric current, prevent voltage and current it is unexpected on
Rise；Current transducer signal modulate circuit prime amplifier chip is using low-power consumption, the high speed amplifier LM224D of low noise；Electric current is mutual
Low-pass filter circuit is equipped between the prime amplifier chip and rear class amplifier chip of sensor modulate circuit, which is
Using the second order active low-pass filter circuit with feedback, there are 2 RC low-pass filters in its positive input；
Temperature-detecting device includes temperature sensor and temperature sensor signal modulate circuit, and wherein temperature sensor uses WZP
Type platinum resistance temperature sensor Pt1000, temperature sensor collection oil tank of transformer temperature, is converted to resistance by temperature change and becomes
Change, the resistance value of temperature sensor is converted to voltage signal, the temperature sensor letter by temperature sensor signal modulate circuit
Resistance value is converted to magnitude of voltage by number modulate circuit；It includes amplifier OP1 and amplifier OP2；The sign-changing amplifier of amplifier OP1 compositions
Feedback resistance replaced with Pt1000, realize that constant-current source exports, ensure with temperature change the change of Pt1000 values when, output voltage
Prime amplifier is exported again anti-phase amplification and exported by linear change, amplifier OP2, becomes satisfactory voltage output；In reality
Before the temperature test on border, it is necessary first to returned to zero and adjusted completely, replace Pt1000 to be connected in circuit with accurate adjustable resistance,
Change its resistance value, 1000 Europe of equivalent resistance of Pt1000 when making it be 0 DEG C, the output for then adjusting OP1 is 0, is then changed
Accurate adjustable electric resistance value, 1753.3 Europe of equivalent resistance of Pt1000 when making it be 150 DEG C, the then output of adjusting OP2 are
1500mv, completes zeroing and adjusts completely, the output signal of OP2 is connected to an ADC input port of CC2530, realizes AD conversion；
Wireless sensor network apparatus includes terminal node and coordinator, and terminal node is used for the data acquisition of temperature and electric current,
By current transducer signal modulate circuit and the transformed voltage signal of temperature sensor signal modulate circuit be AD converted with
Form Digital Detecting value；Coordinator is used to terminal node and coordinator establishing wireless network.
2. electricity distribution power transformator remote monitoring system as claimed in claim 1, it is characterised in that：Long-distance monitorng device monitors
Above-mentioned electric current, temperature digital detected value, when one or both of which is constantly in higher than warning value in the given time, pass through
Mobile communications device sends the order of the switch of control transformer output and/or the switch of transformer cooling fan.
3. electricity distribution power transformator remote monitoring system as claimed in claim 1, it is characterised in that：The system further includes driving
Circuit, drives cooling fan switch and transformer output switch under the control of wireless sensor network apparatus.
4. electricity distribution power transformator remote monitoring system as claimed in claim 1, it is characterised in that：Long-distance monitorng device will be received
The temperature and electric current centrifugal pump serialization arrived, difference real-time rendering are stored in number into temperature curve and current curve, and by data
According to storehouse.
5. electricity distribution power transformator remote monitoring system as claimed in claim 1, it is characterised in that：Wireless sensor network fills
Put and use ZIGBEE modules；Mobile communications device uses GPRS module.
6. electricity distribution power transformator remote monitoring system as claimed in claim 1, it is characterised in that：Long-distance monitorng device includes
Host computer and microprocessor.
7. one kind carries out electricity distribution power using the electricity distribution power transformator remote monitoring system as described in one of claim 1-6
The method of transformator remote monitoring, it is characterised in that include the following steps：
The electric current of current sensing means detection electricity distribution power transformer simultaneously sends detection signal to wireless sensor network apparatus,
The temperature of temperature-detecting device detection electricity distribution power transformer simultaneously sends detection signal to wireless sensor network apparatus, wirelessly
Above-mentioned current detection signal and/or temperature detection signal are converted to Digital Detecting value and by mobile logical by sensor network apparatus
T unit is sent to long-distance monitorng device；
Long-distance monitorng device receives the above-mentioned detected value sent of mobile communications device and by mobile communications device to wireless sensing
Device network equipment sends control command, to control the switch of transformer and/or transformer cooling fan.
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| CN104967218A (en) * | 2015-07-09 | 2015-10-07 | 江苏阳澄电力建设有限公司 | Power grid transformer safety detection method |
| CN105513253A (en) * | 2016-03-03 | 2016-04-20 | 国网山东省电力公司郓城县供电公司 | Low-voltage distribution cabinet fire alarm system |
| CN106169814B (en) * | 2016-08-23 | 2018-12-04 | 苏州盛达飞智能科技股份有限公司 | It is a kind of can remotely intelligently monitoring transformation system |
| CN106292517A (en) * | 2016-08-31 | 2017-01-04 | 天津天大求实电力新技术股份有限公司 | A kind of box type transformer remotely monitors and controls device |
| CN107612142A (en) * | 2017-09-29 | 2018-01-19 | 孙培丽 | wind power generation transformer remote monitoring system based on Zigbee technology |
| CN107656479A (en) * | 2017-10-25 | 2018-02-02 | 中国恩菲工程技术有限公司 | Handheld terminal and power distribution control method |
| CN108183551A (en) * | 2017-12-28 | 2018-06-19 | 潘彦伶 | The wireless sensor network measure and control device of power transformer |
| CN110658401A (en) * | 2019-09-30 | 2020-01-07 | 徐州柏兴电子有限公司 | Detection device for transformer |
| CN111398668A (en) * | 2020-04-07 | 2020-07-10 | 中国原子能科学研究院 | Measuring circuit and device |
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