CN108802483A - A kind of the transformer iron core grounding current on-Line Monitor Device and method of suitable cold operation - Google Patents
A kind of the transformer iron core grounding current on-Line Monitor Device and method of suitable cold operation Download PDFInfo
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- CN108802483A CN108802483A CN201810493955.3A CN201810493955A CN108802483A CN 108802483 A CN108802483 A CN 108802483A CN 201810493955 A CN201810493955 A CN 201810493955A CN 108802483 A CN108802483 A CN 108802483A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
- G01R19/2506—Arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details concerning sampling, digitizing or waveform capturing
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Abstract
The present invention relates to transformer online monitoring technical fields, more particularly to a kind of the transformer iron core grounding current on-Line Monitor Device and method of suitable cold operation, specifically a kind of on-Line Monitor Device and measurement method for transformer iron core grounding current, suitable for running at low temperature.The present invention includes shell, heat insulation coating and circuit board；Shell is laid on an interior surface of the housing in outermost layer, heat insulation coating, and circuit board is in innermost layer；The shell is divide into upper part and lower part, and upper shell is equipped with window, and is sealed by tempered glass；The trepanning of lower housing top is used for punch current transfomer lead, tapping sealing；Lower housing bottom end is equipped with aviation socket, and for connecting power cord and communication line, lower housing is equipped with mounting hole；Rubber sealant is equipped at body seam.The present invention can reliable and stable operation at low ambient temperatures, mitigate workload, reduce maintenance cost, so that failure transformer is obtained timely processing, avoid accident, have larger economic benefit and social effect.
Description
Technical field
The present invention relates to transformer online monitoring technical field more particularly to a kind of transformer cores of suitable cold operation
Earth current on-Line Monitor Device and method, it is specifically a kind of to be transported at low temperature for transformer iron core grounding current, suitable
Capable on-Line Monitor Device and measurement method.
Background technology
Transformer online monitoring device is the important component for constituting intelligent power network, and transformer iron core grounding current exists
Line monitoring device is capable of the working condition of accurate judgement transformer by the monitoring to transformer core current, in transformation
Device is safeguarded in time before breaking down.
In northern China, winter temperature is extremely low, and low temperature environment has seriously affected transformer iron core grounding current on-line monitoring
The stability and reliability of device.Existing transformer iron core grounding current on-Line Monitor Device is seldom spy for low temperature environment
It is different to design and handle, the problem of being not suitable for operation at low ambient temperatures, be susceptible to data distortion or even monitoring device damage.Such as
Solution transformer iron core grounding current on-Line Monitor Device is long-term at low ambient temperatures for what, stablize, reliably operation is a coke
Point problem.
In conclusion the present invention has studied a kind of transformer iron core grounding current on-line monitoring dress of suitable cold operation
Set, not only met at low ambient temperatures it is long-term, stablize, reliably run, but also the intelligent need of transformer online monitoring can be met
It asks.
Invention content
The present invention for the above-mentioned prior art the problem of, provide a kind of transformer core of suitable cold operation
Earth current on-Line Monitor Device and method.Purpose is to realize that transformer iron core grounding current on-Line Monitor Device can be
It is long-term under low temperature environment, stablize, reliably run, monitored on-line for transformer iron core grounding current and new method be provided.
At low ambient temperatures, transformer iron core grounding current on-Line Monitor Device is likely to occur acquisition precision decline, device
The problems such as power consumption increases, and communication bit error rates are high, and screen display is abnormal, and device cannot be started up.In order to solve it is above-mentioned in the prior art
There are the problem of, the present invention is achieved by the following technical solutions：
A kind of transformer iron core grounding current on-Line Monitor Device of suitable cold operation, including shell, heat insulation coating and circuit
Plate；Shell is laid on an interior surface of the housing in outermost layer, heat insulation coating, and circuit board is in innermost layer；The shell is divided into up and down
Two parts, upper shell is equipped with window, and is sealed by tempered glass；The trepanning of lower housing top is used for punch current transfomer lead, opens
It is sealed at hole；Lower housing bottom end is equipped with aviation socket, and for connecting power cord and communication line, lower housing is equipped with mounting hole；Shell
Body seam crossing is equipped with rubber sealant.
The material of the shell is cast aluminium.
The material of the heat insulation coating is silica nano-pore heat-insulating material.
The circuit board is connect with signal processing unit by straight-through current transformer, at signal processing unit and ARM
Reason device connection, arm processor are connect with display unit, and arm processor is connect with communication unit, and arm processor adds with intelligence electricity
Hot cell connects, and arm processor is connect with clock unit, and arm processor is connect with data storage cell.
The intelligence electric heating unit is connect with temperature control circuit by auxiliary electric heating circuit, main electric heating circuit and temperature control electricity
Road connects, electric heating circuit supplemented by power supply unit, and temperature control circuit and main electric heating circuit provide power supply.
The intelligence electric heating unit has temp sensing function, heating function and remote interaction function, intelligent electric heating unit
Member can measure the internal temperature of the present apparatus in real time, and by temperature data long-distance Log server to from the background；When the internal temperature of the present apparatus
Less than preset temperature threshold TLWhen, the heating function of intelligent electric heating unit starts automatically, therewith the internal temperature of the present apparatus
It increases, when the temperature is higher than preset temperature threshold THWhen, the heating function of intelligent electric heating unit stops, repeatedly, after
The temperature threshold T of the platform remotely modifying present apparatusLAnd TH。
The monitoring device can acquire the total current value, fundamental current value and prison of transformer core at low ambient temperatures
Survey device internal temperature value parameter；Can be intelligent substation I with backstage telecommunication, communication protocol0Communication protocol, physical layer
Link is RS485 circuits；Data can be locally stored, portion stores 1 year or more monitoring data in the device；It can be locally displayed,
User is facilitated to check monitoring data and unit state；Can automatic alarm, when electric current transfinites, at once to backstage alarm.
Using a kind of monitoring method of the transformer iron core grounding current on-Line Monitor Device of suitable cold operation,
Including：
Step 1 is coupled from transformer core grounding line by straight-through current transformer and obtains transformer iron core grounding current
Signal is performed simultaneously step 2；
Step 2, the current signal for coupling acquisition passes to signal processing unit, here, current signal is first be converted into voltage
Then signal is filtered voltage signal, be finally amplified processing to the voltage signal for filtering out interference, be performed simultaneously
Step 3；
Step 3, amplified voltage signal pass to arm processor, here, amplified voltage signal is first be converted into
Then digital signal is handled and is calculated to digital signal, and then obtain the ginsengs such as the total current of transformer core, fundamental current
Number is simultaneously capped timestamp by clock unit, then is analyzed and determined to these parameters, is preset if parameter is not above
Alarming value, then follow the steps four, if parameter be more than preset alarming value, then follow the steps five；
Step 4 at once shows these parameters in display unit, periodically stores these parameters to data and stores list
In member, if backstage is performed simultaneously by communication unit teletransmission to backstage to apparatus of the present invention request data, by these parameters
Step 6；
Step 5 immediately passes through communication unit and alarms to backstage, by display unit display alarm information, is stored by data single
Member storage alarm parameters, are performed simultaneously step 6；
Step 6 measures apparatus of the present invention internal temperature by intelligent electric heating unit, if temperature is less than preset temperature
Spend threshold value TL, seven are thened follow the steps, if temperature is higher than temperature threshold TLAnd it is less than temperature threshold THEight are thened follow the steps, if
Temperature is higher than temperature threshold THThen follow the steps nine；
Step 7 starts the heating function of intelligent electric heating unit, is performed simultaneously step 1；
Step 8 maintains the state for starting intelligent electric heating unit constant, is performed simultaneously step 1；
Step 9 closes the heating function of intelligent electric heating unit, is performed simultaneously step 1.
The invention has the advantages that and advantageous effect：
The special research and design the present invention be directed to low temperature environment, can reliable and stable operation at low ambient temperatures, specific table
Now：High certainty of measurement, communication bit error rates are low, alarm delay it is small, store function is normal, and display function is normal, monitoring device without
Crash phenomenon etc..The above-mentioned advantage of monitoring device alleviates the workload of maintenance personnel, reduces maintenance cost, provides
Reliability services allow failure transformer to obtain timely processing, avoid the generation of electric power accident.
Apparatus of the present invention can monitor the parameters such as the total current of transformer core, fundamental current on-line, have be locally displayed,
Be locally stored, telecommunication, the functions such as fault alarm, be suitble to run at low ambient temperatures, have a extensive future, the effect reached
Fruit is：1. improving the reliability and stability that low temp area transformer operating mode judges；2. saving low temp area transformer fe
The maintenance cost of core earth current monitoring device；3. realizing low temp area transformer remotely monitor and failure predication.One kind is suitable
The transformer iron core grounding current on-Line Monitor Device of suitable cold operation has larger economic benefit and social effect.
In the following with reference to the drawings and specific embodiments, the present invention is described in further detail, but not by the present embodiment institute
Limit.
Description of the drawings
Fig. 1 is the device of the invention structural schematic diagram；
Fig. 2 is the schematic block circuit diagram of the present invention；
Fig. 3 is intelligent electric heating unit functional block diagram.
In figure：Shell 1, heat insulation coating 2, circuit board 3, straight-through current transformer 4, signal processing unit 5, display unit
6, communication unit 7, arm processor 8, intelligent electric heating unit 9, clock unit 10, data storage cell 11, power supply unit 12,
Auxiliary electric heating circuit 13, temperature control circuit 14, main electric heating circuit 15.
Specific implementation mode
The present invention is a kind of transformer iron core grounding current on-Line Monitor Device of suitable cold operation, mainly from following three
Aspect is studied：First, device inside heat temperature raising；Second, device case sealing thermal insulation；Third, device parts selection are resistance to
Low temperature.The present invention is made of shell 1, heat insulation coating 2 and circuit board 3.In outermost layer, heat insulation coating 2 is laid in shell 1 shell 1
Inner surface on, circuit board 3 is in innermost layer.
The material of shell 1 is cast aluminium, and shell 1 is divide into upper part and lower part, and upper shell is provided with window, and close by tempered glass
Envelope.The trepanning of lower housing top is used for punch current transfomer lead, trepanning sealing；Lower housing bottom end is set there are two aviation socket, is used for
Power cord and communication line are connected, four angles of lower housing are respectively equipped with a mounting hole, and installation for device is fixed.Body seam
Place enhances the insulating power of device using rubber sealant to slow down the heat loss of monitoring device, to slow down monitoring
The heat loss of device.
The material of the heat insulation coating 2 is silica nano-pore heat-insulating material, and heat insulation effect is good, and is saved empty inside device
Between.
The circuit board 3 includes：Straight-through current transformer 4, signal processing unit 5, display unit 6, communication unit 7,
Arm processor 8, intelligent electric heating unit 9, clock unit 10, data storage cell 11, power supply unit 12.Wherein, punching electricity
Current transformer 4 is connect with signal processing unit 5, and signal processing unit 5 is connect with arm processor 8, arm processor 8 and display
Unit 6 connects, and arm processor 8 is connect with communication unit 7, and arm processor 8 is connect with intelligent electric heating unit 9, arm processor
8 connect with clock unit 10, and arm processor 8 is connect with data storage cell 11, and power supply unit 12 provides electricity for all units
Source.
The intelligence electric heating unit 9 includes：Auxiliary electric heating circuit 13, temperature control circuit 14, main electric heating circuit 15.Its
In, auxiliary electric heating circuit 13 is connect with temperature control circuit 14, and main electric heating circuit 15 is connect with temperature control circuit 14.Power supply unit 12 is
Auxiliary electric heating circuit 13, temperature control circuit 14, main electric heating circuit 15 provide power supply.
The present invention is specifically that the intelligent electric heating unit 9 of portion's design, the intelligence electric heating unit 9 have thermometric in the device
Function, heating function and remote interaction function.Intelligent electric heating unit 9 can measure the inside temperature of apparatus of the present invention in real time
Degree, and by temperature data long-distance Log server to from the background.When the internal temperature of apparatus of the present invention is less than preset temperature threshold TLWhen, intelligence
The heating function of energy electric heating unit 9 starts automatically, and the internal temperature of apparatus of the present invention increases therewith, when the temperature is higher than default
Temperature threshold THWhen, the heating function of intelligent electric heating unit 9 stops, repeatedly.It backstage can be with the remotely modifying present invention
The temperature threshold T of deviceLAnd TH。
Since the present invention is designed for low temperature environment, which can acquire the complete of transformer core at low ambient temperatures
The parameters such as current value, fundamental current value and monitoring device internal temperature values of the present invention；It can be with backstage telecommunication, communication protocols
View is intelligent substation I0Communication protocol, physical layer link are RS485 circuits；Data can be locally stored, monitoring data can be with
Portion stores 1 year or more in the device；It can be locally displayed, user is facilitated to check monitoring data and unit state；It can report automatically
It is alert, when electric current transfinites, alarm at once to backstage.
When it is implemented, monitoring device of the present invention can select technical grade, the electronic component of wide temperature range, mutual inductor
With power supply etc., so as to promote the low temperature tolerance ability of monitoring device very well, even if at low ambient temperatures, monitoring device still has
There are good stability and reliability.
A kind of monitoring method of the transformer iron core grounding current on-Line Monitor Device of suitable cold operation of the present invention, including
Following steps：
Step 1：It is coupled from transformer core grounding line by straight-through current transformer 4 and obtains transformer core grounding electricity
Signal is flowed, step 2 is performed simultaneously；
Step 2：The current signal that coupling obtains passes to signal processing unit 5, here, current signal is first be converted into electricity
Signal is pressed, then voltage signal is filtered, processing finally is amplified to the voltage signal for filtering out interference, is held simultaneously
Row step 3；
Step 3：Amplified voltage signal passes to arm processor 8, here, amplified voltage signal is first be converted into
Then digital signal is handled and is calculated to digital signal, and then obtain the ginsengs such as the total current of transformer core, fundamental current
Number is simultaneously capped timestamp by clock unit 10, then is analyzed and determined to these parameters, is set in advance if parameter is not above
Fixed alarming value, thens follow the steps four, if parameter is more than preset alarming value, thens follow the steps five；
Step 4：These parameters are shown in display unit 6 at once, periodically these parameters are stored to data and store list
In member 11, if from the background to apparatus of the present invention request data, by these parameters by 7 teletransmission of communication unit to backstage, simultaneously
Execute step 6；
Step 5：It immediately passes through communication unit 7 to alarm to backstage, by 6 display alarm information of display unit, be stored by data
Unit 11 stores alarm parameters, is performed simultaneously step 6；
Step 6：Apparatus of the present invention internal temperature is measured by intelligent electric heating unit 9, if temperature is less than preset temperature
Spend threshold value TL, seven are thened follow the steps, if temperature is higher than temperature threshold TLAnd it is less than temperature threshold THEight are thened follow the steps, if
Temperature is higher than temperature threshold THThen follow the steps nine；
Step 7：The heating function for starting intelligent electric heating unit 9, is performed simultaneously step 1；
Step 8：It maintains the state for starting intelligent electric heating unit 9 constant, is performed simultaneously step 1；
Step 9：The heating function for closing intelligent electric heating unit 9, is performed simultaneously step 1.
As described above, the embodiment of the present invention is described in detail, as long as but essentially without this hair of disengaging
Bright inventive point and effect can have many deformations, this will be readily apparent to persons skilled in the art.Therefore, this
The variation of sample is also integrally incorporated within protection scope of the present invention.
Claims (8)
1. a kind of transformer iron core grounding current on-Line Monitor Device of suitable cold operation, it is characterised in that：Including shell
（1）, heat insulation coating（2）And circuit board（3）；Shell（1）In outermost layer, heat insulation coating（2）Be laid in shell（1）Inner surface
On, circuit board（3）In innermost layer；The shell（1）It is divide into upper part and lower part, upper shell is equipped with window, and by tempered glass
Sealing；The trepanning of lower housing top is used for punch current transfomer lead, tapping sealing；Lower housing bottom end is equipped with aviation socket, is used for
Power cord and communication line are connected, lower housing is equipped with mounting hole；Rubber sealant is equipped at body seam.
2. a kind of transformer iron core grounding current on-Line Monitor Device of suitable cold operation according to claim 1,
It is characterized in that：The shell（1）Material be cast aluminium.
3. a kind of transformer iron core grounding current on-Line Monitor Device of suitable cold operation according to claim 1,
It is characterized in that：The heat insulation coating（2）Material be silica nano-pore heat-insulating material.
4. a kind of transformer iron core grounding current on-Line Monitor Device of suitable cold operation according to claim 1,
It is characterized in that：The circuit board（3）It is by straight-through current transformer（4）With signal processing unit（5）Connection, signal processing list
Member（5）With arm processor（8）Connection, arm processor（8）With display unit（6）Connection, arm processor（8）With communication unit
（7）Connection, arm processor（8）With intelligent electric heating unit（9）Connection, arm processor（8）With clock unit（10）Connection,
Arm processor（8）With data storage cell（11）Connection.
5. a kind of transformer iron core grounding current on-Line Monitor Device of suitable cold operation according to claim 4,
It is characterized in that：The intelligence electric heating unit（9）It is by auxiliary electric heating circuit（13）With temperature control circuit（14）Connection, main electrical heating
Circuit（15）With temperature control circuit（14）Connection, power supply unit（12）Supplemented by electric heating circuit（13）, temperature control circuit（14）And main electricity
Heater circuit（15）Power supply is provided.
6. a kind of transformer iron core grounding current on-Line Monitor Device of suitable cold operation according to claim 4,
It is characterized in that：The intelligence electric heating unit has temp sensing function, heating function and remote interaction function, intelligent electric heating unit
Member can measure the internal temperature of the present apparatus in real time, and by temperature data long-distance Log server to from the background；When the internal temperature of the present apparatus
Less than preset temperature threshold TLWhen, the heating function of intelligent electric heating unit starts automatically, therewith the internal temperature of the present apparatus
It increases, when the temperature is higher than preset temperature threshold THWhen, the heating function of intelligent electric heating unit stops, repeatedly, after
The temperature threshold T of the platform remotely modifying present apparatusLAnd TH。
7. a kind of transformer iron core grounding current on-Line Monitor Device of suitable cold operation according to claim 1,
It is characterized in that：The monitoring device can acquire at low ambient temperatures the total current value of transformer core, fundamental current value and
Monitoring device internal temperature value parameter；Can be intelligent substation I with backstage telecommunication, communication protocol0Communication protocol, physics
Layer link is RS485 circuits；Data can be locally stored, portion stores 1 year or more monitoring data in the device；It can locally show
Show, user is facilitated to check monitoring data and unit state；Can automatic alarm, when electric current transfinites, at once to backstage alarm.
8. the prison of the transformer iron core grounding current on-Line Monitor Device using a kind of suitable cold operation described in claim 1
Survey method, it is characterised in that：Include the following steps：
Step 1 is coupled from transformer core grounding line by straight-through current transformer and obtains transformer iron core grounding current
Signal is performed simultaneously step 2；
Step 2, the current signal for coupling acquisition passes to signal processing unit, here, current signal is first be converted into voltage
Then signal is filtered voltage signal, be finally amplified processing to the voltage signal for filtering out interference, be performed simultaneously
Step 3；
Step 3, amplified voltage signal pass to arm processor, here, amplified voltage signal is first be converted into
Then digital signal is handled and is calculated to digital signal, and then obtain the ginsengs such as the total current of transformer core, fundamental current
Number is simultaneously capped timestamp by clock unit, then is analyzed and determined to these parameters, is preset if parameter is not above
Alarming value, then follow the steps four, if parameter be more than preset alarming value, then follow the steps five；
Step 4 at once shows these parameters in display unit, periodically stores these parameters to data and stores list
In member, if backstage is performed simultaneously by communication unit teletransmission to backstage to apparatus of the present invention request data, by these parameters
Step 6；
Step 5 immediately passes through communication unit and alarms to backstage, by display unit display alarm information, is stored by data single
Member storage alarm parameters, are performed simultaneously step 6；
Step 6 measures apparatus of the present invention internal temperature by intelligent electric heating unit, if temperature is less than preset temperature
Spend threshold value TL, seven are thened follow the steps, if temperature is higher than temperature threshold TLAnd it is less than temperature threshold THEight are thened follow the steps, if
Temperature is higher than temperature threshold THThen follow the steps nine；
Step 7 starts the heating function of intelligent electric heating unit, is performed simultaneously step 1；
Step 8 maintains the state for starting intelligent electric heating unit constant, is performed simultaneously step 1；
Step 9 closes the heating function of intelligent electric heating unit, is performed simultaneously step 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810493955.3A CN108802483A (en) | 2018-05-22 | 2018-05-22 | A kind of the transformer iron core grounding current on-Line Monitor Device and method of suitable cold operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810493955.3A CN108802483A (en) | 2018-05-22 | 2018-05-22 | A kind of the transformer iron core grounding current on-Line Monitor Device and method of suitable cold operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108802483A true CN108802483A (en) | 2018-11-13 |
Family
ID=64091314
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810493955.3A Pending CN108802483A (en) | 2018-05-22 | 2018-05-22 | A kind of the transformer iron core grounding current on-Line Monitor Device and method of suitable cold operation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112986730A (en) * | 2021-02-08 | 2021-06-18 | 国网内蒙古东部电力有限公司呼伦贝尔供电公司 | Distribution transformer handover test movable detection device suitable for extremely cold environment |
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| CN108008233A (en) * | 2017-10-31 | 2018-05-08 | 国网电力科学研究院武汉南瑞有限责任公司 | A kind of the arrester on-Line Monitor Device and method of suitable cold operation |
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| CN101430370A (en) * | 2008-10-27 | 2009-05-13 | 西安西工大思强科技有限公司 | Thermostatic control zero-drift fluxgraph |
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Application publication date: 20181113 |