CN109238485A - Intelligent transformer digital display oil temperature gauge based on low-power wireless communication - Google Patents
Intelligent transformer digital display oil temperature gauge based on low-power wireless communication Download PDFInfo
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- CN109238485A CN109238485A CN201811457084.6A CN201811457084A CN109238485A CN 109238485 A CN109238485 A CN 109238485A CN 201811457084 A CN201811457084 A CN 201811457084A CN 109238485 A CN109238485 A CN 109238485A
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- temperature
- oil temperature
- module
- wireless communication
- digital display
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/18—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a linear resistance, e.g. platinum resistance thermometer
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The present invention relates to a kind of intelligent transformer digital display oil temperature gauges based on low-power wireless communication, the oil temperature gauge and substation's background computer communicate to connect, the oil temperature gauge includes local control device and temperature sensor interconnected, the temperature sensor is mounted in installation for transformer, the local control device includes MCU and the signal acquisition process module that connect respectively with MCU, data storage, module is locally displayed, radio receiving transmitting module and analog output module, the signal acquisition module is connect with temperature sensor, the radio receiving transmitting module and substation's background computer is wirelessly connected.Compared with prior art, the present invention has many advantages, such as that the service life for promoting transformer brings direct economic benefit and extensive social benefit.
Description
Technical field
The present invention relates to a kind of transformer digital display oil temperature gauges, more particularly, to a kind of transformation based on low-power wireless communication
Device intelligent digital oil temperature gauge.
Background technique
Since the service life of transformer depends on its winding temperature, winding temperature plays insulating materials conclusive
Effect.DL/T572--1995 " power transformer operating standard " provides the upper layer oil temperature of transformer, generally must not exceed 95 DEG C.
Upper layer oil temperature is if it exceeds 95 DEG C, and winding insulation will be more than high-temperature capability, to accelerate the aging of insulating materials.Therefore become
Depressor 85 DEG C of boundary of upper layer oil temperature general provision in operation.Temperature of oil in transformer is excessively high in order to prevent, accelerates transformer old
Change, it is necessary to be used to the upper layer oil temperature of measuring transformer fuel tank by charge of oil surface thermometer to monitor the operating status of transformer, winding
The monitoring of thermometer for transformer coil temperature, when necessary according to oil temperature or winding temperature start and stop cooling system.
The thermometer that power transformer uses at present is largely pressure-type thermometer.Pass through long-term operation and maintenance and inspection
Repairing work discovery transformer pressure type temperature measuring equipment, there are following disadvantages:
1) pointer shows that table and remote temperature display error are big on the spot, generally at 2-5 DEG C (when temperature sensing package capillary pipe length is big
In two Watch Error maximum of 6m up to 8 DEG C or more)
2) due to environment temperature, humidity, to the influence for showing table on the spot, pointer lags frequent occurrence, and electrical contact switch is stuck
Or contact short circuit.High failure rate
3) maximum the disadvantage is that maintenance verification or replacement damage thermometer must transformer have a power failure when carry out (capillary
Thermometer bulb is mounted on transformer top gauge outfit and thermometer bulb and must replace simultaneously).
4) have a power failure when replacing intelligent number meter, if former meter and meter wiring are different, need in addition to lay from transformer to
The cable of control room.
With the propulsion of Diagnostic Examination And Repair of Electric Power Facilities, on-bne repair to the reliability and service life of transformer thermometer and
More stringent requirements are proposed for Maintenance and Repair.A kind of transformer intelligence based on low-power wireless communication is proposed to solve this problem
It can digital display oil temperature gauge.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind based on low-power without
The intelligent transformer digital display oil temperature gauge of line communication.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of intelligent transformer digital display oil temperature gauge based on low-power wireless communication, the oil temperature gauge and substation's background computer are logical
Letter connection, the oil temperature gauge includes local control device and temperature sensor interconnected, the temperature sensor peace
In installation for transformer, the local control device includes MCU and the signal acquisition process mould connecting respectively with MCU
Block, data storage are locally displayed module, radio receiving transmitting module and analog output module, the signal acquisition module with
Temperature sensor connection, the radio receiving transmitting module and substation's background computer are wirelessly connected.
Preferably, the temperature sensor is platinum resistance temperature sensor.
Preferably, there are 3 groups of PT temperature-sensing elements inside the platinum resistance temperature sensor, it is ensured that amount of redundancy, temperature measurement
Precision reaches 0.5 grade, 1 DEG C of scene temperature show value and distant place display error value <.
Preferably, the data volume that the signal acquisition process module acquires temperature sensor is converted by passing through A/D,
MCU is sent to after operation amplifier, which realizes data statistic analysis function.
Preferably, the statistical analysis includes:
Data storage, is more than 1 year to history data store；
Query statistic has and carries out statistic record daily and monthly, and count transformer day-to-day operation maximum temperature and
Abnormal oil temperature, winding temperature；
Display function can show transformer current oil temperature temperature, show real time data；
The electric current ratio of casing current CT, hard contact switch temperature can be inquired and are arranged to parameter setting and inquiry；
Event detection and alarm function occur temperature beyond limit and generate alarm signal when temperature is more than the temperature of setting.
Preferably, the radio receiving transmitting module is LoRa radio receiving transmitting module, which passes through SCI
Serial protocol and MCU are communicated to connect.
Preferably, the analog output module is reserved 4-20MA analog interface.
Preferably, the local control device further includes the 220V~5V connecting respectively with MCU and signal acquisition module
Power module.
Compared with prior art, the invention has the following advantages that
The research and development of novel intelligent temperature of oil in transformer will fill up a blank successfully for Transformer's Condition Monitoring, promote transformation
The service life of device brings direct economic benefit and extensive social benefit, and table 1 is electronic digital display thermometer of the present invention and biography
The pressure type finger thermometer advantage contrast table of system.
Table 1
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is a part of the embodiments of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, those of ordinary skill in the art's every other reality obtained without making creative work
Example is applied, all should belong to the scope of protection of the invention.
The present invention by designing a kind of intelligent transformer digital display oil temperature gauge, can be effectively reduced pointer display table on the spot and
Remote temperature show between error, avoid influencing the judgement of O&M service personnel since registration difference between the two is excessive；It can
To carry out on-line testing, maintenance or replacement to oil temperature gauge under transformer not power-off condition, significantly reduce since meter failure is led
The equipment power off time of cause, lifting means reliability；By a kind of low-power wireless mechanics of communication, the information of meter can be passed
Backstage is transported to, there is significant economic benefit.
The present invention is by platinum resistance temperature sensor, by A/D conversion, operation amplifier, acquires data using MCU processor
And data processing is carried out, and provide and be locally displayed, and the day-to-day operation maximum temperature and abnormal oil temperature, winding of record transformer
The data function of temperature.Then it connect and communicates wirelessly with LoRa radio receiving transmitting module by SCI serial protocol, pass through from the background
LoRa radio receiving transmitting module carries out data receiver, carries out data analysis and alarm by daemon software.
As shown in Figure 1, the present invention is based on the intelligent transformer digital display oil temperature gauge of low-power wireless communication, the oil temperature gauge and change
The communication connection of power station background computer, the oil temperature gauge includes local control device and temperature sensor interconnected, described
Temperature sensor is mounted in installation for transformer, and the local control device includes MCU and the signal that connect respectively with MCU
Module, radio receiving transmitting module and analog output module, the signal is locally displayed in acquisition processing module, data storage
Acquisition module is connect with temperature sensor, and the radio receiving transmitting module and substation's background computer are wirelessly connected.
The temperature sensor is platinum resistance temperature sensor.There are 3 groups of PT inside the platinum resistance temperature sensor
Temperature-sensing element, it is ensured that amount of redundancy, temperature measurement precision reach 0.5 grade, scene temperature show value and distant place display error value < 1
℃.Due to the high stability of platinum resistance temperature sensor, transformation caused by can effectively reducing due to temperature sensor fault
Device forced outage promotes power supply reliability.
The data volume that the signal acquisition process module acquires temperature sensor by converting by A/D, put by operation
It is sent to MCU after big, which realizes data statistic analysis function.
The statistical analysis includes:
Data storage, is more than 1 year to history data store；
Query statistic has and carries out statistic record daily and monthly, and count transformer day-to-day operation maximum temperature and
Abnormal oil temperature, winding temperature；
Display function can show transformer current oil temperature temperature, show real time data；
The electric current ratio of casing current CT, hard contact switch temperature can be inquired and are arranged to parameter setting and inquiry；
Event detection and alarm function occur temperature beyond limit and generate alarm signal when temperature is more than the temperature of setting.
The radio receiving transmitting module is LoRa radio receiving transmitting module, which is serially assisted by SCI
View is communicated to connect with MCU.MCU output data is connect with LoRa radio receiving transmitting module by SCI serial protocol and is communicated wirelessly,
Temperature data is transmitted to backstage.And by optimization design related protocol, so that each the subterranean equipment comprising communication module is equal
Have data forwarding function, avoids loss of data.
The analog output module is reserved 4-20MA analog interface, and the verification for carrying out meter, data is facilitated to have
The work such as line transmission.
The local control device further includes the 220V~5V power supply mould connecting respectively with MCU and signal acquisition module
Block.
The research and development of novel intelligent temperature of oil in transformer will fill up a blank successfully for Transformer's Condition Monitoring, promote transformation
The service life of device brings direct economic benefit and extensive social benefit.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or replace
It changes, these modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with right
It is required that protection scope subject to.
Claims (8)
1. a kind of intelligent transformer digital display oil temperature gauge based on low-power wireless communication, the oil temperature gauge are communicated with substation's background computer
Connection, which is characterized in that the oil temperature gauge includes local control device and temperature sensor interconnected, the temperature
Sensor is mounted in installation for transformer, and the local control device includes MCU and the signal acquisition that connect respectively with MCU
Module, radio receiving transmitting module and analog output module, the signal acquisition is locally displayed in processing module, data storage
Module is connect with temperature sensor, and the radio receiving transmitting module and substation's background computer are wirelessly connected.
2. a kind of intelligent transformer digital display oil temperature gauge based on low-power wireless communication according to claim 1, feature
It is, the temperature sensor is platinum resistance temperature sensor.
3. a kind of intelligent transformer digital display oil temperature gauge based on low-power wireless communication according to claim 2, feature
It is there are 3 groups of PT temperature-sensing elements inside the platinum resistance temperature sensor, it is ensured that amount of redundancy, temperature measurement precision reach 0.5
1 DEG C of grade, scene temperature show value and distant place display error value <.
4. a kind of intelligent transformer digital display oil temperature gauge based on low-power wireless communication according to claim 1, feature
It is, the data volume that the signal acquisition process module acquires temperature sensor by A/D by converting, after operation amplifier
It is sent to MCU, which realizes data statistic analysis function.
5. a kind of intelligent transformer digital display oil temperature gauge based on low-power wireless communication according to claim 4, feature
It is, the statistical analysis includes:
Data storage, is more than 1 year to history data store；
Query statistic has and carries out statistic record daily and monthly, and counts the day-to-day operation maximum temperature and exception of transformer
Oil temperature, winding temperature；
Display function can show transformer current oil temperature temperature, show real time data；
The electric current ratio of casing current CT, hard contact switch temperature can be inquired and are arranged to parameter setting and inquiry；
Event detection and alarm function occur temperature beyond limit and generate alarm signal when temperature is more than the temperature of setting.
6. a kind of intelligent transformer digital display oil temperature gauge based on low-power wireless communication according to claim 1, feature
Be, the radio receiving transmitting module be LoRa radio receiving transmitting module, the LoRa radio receiving transmitting module by SCI serial protocol with
MCU communication connection.
7. a kind of intelligent transformer digital display oil temperature gauge based on low-power wireless communication according to claim 1, feature
It is, the analog output module is reserved 4-20MA analog interface.
8. a kind of intelligent transformer digital display oil temperature gauge based on low-power wireless communication according to claim 1, feature
It is, the local control device further includes the 220V~5V power module connecting respectively with MCU and signal acquisition module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811457084.6A CN109238485A (en) | 2018-11-30 | 2018-11-30 | Intelligent transformer digital display oil temperature gauge based on low-power wireless communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811457084.6A CN109238485A (en) | 2018-11-30 | 2018-11-30 | Intelligent transformer digital display oil temperature gauge based on low-power wireless communication |
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| CN109238485A true CN109238485A (en) | 2019-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811457084.6A Pending CN109238485A (en) | 2018-11-30 | 2018-11-30 | Intelligent transformer digital display oil temperature gauge based on low-power wireless communication |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112285034A (en) * | 2020-11-02 | 2021-01-29 | 国网上海市电力公司 | Real-time warning method based on conservator sensor and computer equipment |
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|---|---|---|---|---|
| CN101122523A (en) * | 2007-06-26 | 2008-02-13 | 中国铝业股份有限公司 | On-line detection method for transformer insulation oil temperature and characteristic gas in oil and oil chromatography |
| CN102999059A (en) * | 2012-10-11 | 2013-03-27 | 苏州爱知电机有限公司 | GPRS-based (general packet radio service) transformer oil temperature monitoring system |
| CN105043592A (en) * | 2015-08-05 | 2015-11-11 | 国网山东省电力公司东营供电公司 | Transformer oil temperature monitoring system and method based on wireless local area network |
| CN108345326A (en) * | 2017-11-25 | 2018-07-31 | 东北林业大学 | A kind of ribbon heater temperature wireless TT＆C system based on LORA ad hoc networks |
| CN207689030U (en) * | 2017-12-15 | 2018-08-03 | 中国石油天然气股份有限公司 | Temperature transmitter and temperature acquisition system |
-
2018
- 2018-11-30 CN CN201811457084.6A patent/CN109238485A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101122523A (en) * | 2007-06-26 | 2008-02-13 | 中国铝业股份有限公司 | On-line detection method for transformer insulation oil temperature and characteristic gas in oil and oil chromatography |
| CN102999059A (en) * | 2012-10-11 | 2013-03-27 | 苏州爱知电机有限公司 | GPRS-based (general packet radio service) transformer oil temperature monitoring system |
| CN105043592A (en) * | 2015-08-05 | 2015-11-11 | 国网山东省电力公司东营供电公司 | Transformer oil temperature monitoring system and method based on wireless local area network |
| CN108345326A (en) * | 2017-11-25 | 2018-07-31 | 东北林业大学 | A kind of ribbon heater temperature wireless TT＆C system based on LORA ad hoc networks |
| CN207689030U (en) * | 2017-12-15 | 2018-08-03 | 中国石油天然气股份有限公司 | Temperature transmitter and temperature acquisition system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112285034A (en) * | 2020-11-02 | 2021-01-29 | 国网上海市电力公司 | Real-time warning method based on conservator sensor and computer equipment |
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Application publication date: 20190118 |
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