CN201514391U - Intelligent corrosion-resistant and monitoring device of transformer substation earthing network - Google Patents
Intelligent corrosion-resistant and monitoring device of transformer substation earthing network Download PDFInfo
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- CN201514391U CN201514391U CN2009200346682U CN200920034668U CN201514391U CN 201514391 U CN201514391 U CN 201514391U CN 2009200346682 U CN2009200346682 U CN 2009200346682U CN 200920034668 U CN200920034668 U CN 200920034668U CN 201514391 U CN201514391 U CN 201514391U
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- transformer substation
- potentiostat
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- grounded screen
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- 238000004210 cathodic protection Methods 0.000 description 8
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Abstract
The utility model discloses an intelligent corrosion-resistant and monitoring device of a transformer substation earthing network, which consists of a potentiostat, a corrosion on-line detecting sensor, a temperature-humidity sensor, an isolating amplifier, an A/D converter, a single-chip microcomputer, a host computer, a 3G data and image transmitting unit and a remote detecting client, wherein the signals issued by the potentiostat, the corrosion on-line detecting sensor and the temperature-humidity sensor are isolated to be amplified by the isolating amplifier so as to undergo the A/D conversion by entering the A/D converter, and the result obtained by conversion is to be transmitted to the single-chip microcomputer, and then to be transmitted to the host computer, the 3G data and image transmitting unit and the remote detecting client through the single-chip microcomputer. The utility model can achieve the purpose of effectively slowing down the corrosion of the earthing network, prolonging the service life of the earthing network, and realizing real-time and remote monitoring.
Description
Technical field
The utility model relates to a kind of anticorrosive metal and supervising device, and the impressed current cathodic protection, the corrosion that particularly relate to a kind of grounding net of transformer substation detect and wireless remote monitoring device.
Background technology
Grounding net of transformer substation is the indispensable facility that is used for working earthing, lightning protection, protective ground, is the important step of guaranteeing the person, unit safety, and it plays a part earial drainage and all press at anti-thunder and lightning, static and fault current.Along with the development of ehv power transmission, it is more obvious that the importance of grounded screen highlights.Yet the harm that ground net corrosion brings is huge, directly causes the grounded screen cross section to reduce, even fracture.Cause monitoring or opertaing device generation malfunction or tripping indirectly and the expansion accident, in addition damage equipment, the expansion accident, it is stable to destroy the electrical network device, brings enormous economic loss and bad social influence.
The patent No. is that 200720029110.6 utility model patent is mentioned a kind of intelligent frequency-conversion potentiostat, is made up of industrial control unit (ICU) and a plurality of high-frequency DCs source, it is characterized in that described industrial control unit (ICU) is used to control the output valve size in a plurality of high-frequency DCs source; Industrial control unit (ICU) mainly is core with the single-chip microcomputer, constitutes scm observe and control management integration device, finishes detection, demonstration, printing, fault alarm to whole anti-corrosion meter with this, and the major loop signal is controlled automatically.Adopting cathodic protection for grounding net of transformer substation is a kind of means of corroding of effectively preventing, but there is the very poor shortcoming of function singleness and communication function in above-mentioned intelligent frequency-conversion potentiostat and existing similar products.Often after the operation of the intelligent frequency-conversion potentiostat of separate unit, be subjected to the influence of factors such as weather, bigger fluctuation often takes place in potentiostat output, and ignore unusually or mistake is handled by professional knowledge owing to not possessing for common person on duty; In addition, high voltage substation is remote usually, and the technical specialist does not have real-time data, can not in time find to move the unusual of existence, also can't adjust operating condition, makes that conventional impressed current catholic protection device result of use is relatively poor.The patent No. is that 200720062504.1 utility model patent is mentioned a kind of transmission transformer station grounded screen on-line measuring device.This utility model discloses a kind of transmission transformer station grounded screen on-Line Monitor Device, comprise state sensor, signal source, gauge tap, comparison amplifier, operational amplifier 1, power amplifier, operational amplifier 2, operational amplifier 3, operational amplifier 4, differential amplifier, electric resistance measuring apparatus, converter A/D1, converter A/D2, converter A/D3, converter A/D4, single-chip microcomputer, converter D/A1, converter D/A2, wave filter, optoelectronic switch, the square-wave signal of described signal source output is added between the auxiliary electrode and research electrode of state sensor, the electric current that measurement is flow through, the data of measuring are delivered to microprocessor after filtering, the corrosion rate of calculating sensor electrode and the corrosion depth of grounded screen and electric property parameter are judged the security performance of grounded screen according to calculating gained grounded screen electric property parameter.Its shortcoming is that soil corrosion speed is slower, and wave filter filters small and weak signal easily, sensor acquisition be that noise or false data are very big to reality corrosion effect of signals, make that measuring corrosion speed is not actual corrosion speed; The state sensor of this device is connected with grounded screen, and the corrosion speed during the grounded screen earial drainage causes its duty significantly different with actual grounded screen greater than the speed of independent soil corrosion; Though this device adopts a plurality of state sensors to characterize the corrosion condition of whole grounded screen, and has adopted the calculating of transient state and stable state, various places soil property difference causes between its calculated value and the actual value error bigger.Parameter such as grounded screen protection electric current and voltage is closely related with environmental baseline in addition, for example rainy day and arid season, and protection potential, protective current will change, and above-mentioned patent does not consider that all environmental baseline protects the influence of parameter to corruption.
Summary of the invention
The utility model provides a kind of intelligent transformer substation grounding network anti-corrosion and supervising device, this device can reach effectively slow down ground net corrosion, prolong grounded screen serviceable life, the real-time remote monitoring purpose.
The utility model can be drawn the cathodic protection intelligent power of cathodic protection polarization curve, regulates electrical quantitys such as protection potential automatically according to the protection potential on the cathodic protection curve; The ground net corrosion velocity measurement sensor is connected with grounded screen, just moment disconnects when measuring, be in connection status when not measuring, corrosion speed calculate be with local soil be the value of benchmark actual measurement as foundation, adopt four-point method resistance instrument to carry out the conversion of resistance multiplying power and corrosion speed; Carry out data transmission by 3G technology, can guard and control guard mode, etch state at Central Control Room or remote expert office.The purpose of this utility model is to provide a kind of intelligent transformer substation grounding network special anti-corrosion erosion and supervising device; this device possesses the cathodic protection of grounded screen impressed current, the online detection of ground net corrosion degree and based on the parameter of 3G technology and the wireless transmission function three big functions of image.
The technical solution of the utility model is achieved in that
This device is made up of potentiostat, corrosion on-line detector, Temperature Humidity Sensor, isolated amplifier, analog to digital converter, single chip computer device, host computer, 3G data and image transmission transmitter unit, remote detection client etc.Its connected mode be the signal that sends of potentiostat, corrosion on-line detector, Temperature Humidity Sensor through isolate through isolated amplifier amplify after, enter analog to digital converter and carry out the A/D conversion and result's conversion is sent to single-chip microcomputer, send to host computer and 3G data and image respectively by single-chip microcomputer again and transmit transmitter unit, remote detection client.
Described corrosion detecting line sensor comprises steel plate, is connected to terminal at the steel plate two ends, the wide 40-60mm of its light plate, and thick 2-6mm, long is 4-6m.
Have reversing switch to be connected between resistance measurement sensor and the grounded screen, reversing switch and grounded screen disconnect during measurement, and reversing switch is connected with grounded screen during operation; Four point measurements are to be benchmark with local soil corrosion speed and resistance multiplying power, have guaranteed the accuracy of measurement data.
Carry out data transmission by 3G technology, can carry out long distance monitoring and control guard mode, etch state.
Possesses the function that the grounded screen humiture is measured.
The utility model has been realized the automatic adjusting of protection potential, makes the impressed current cathodic protection current potential be in the best protection current potential all the time, overprotection and state under proteciton can not occur.The protection degree that makes grounded screen is about 90%, and the life-span prolongs about 8 times; By the resistance of local soil actual measurement and the pass of corrosion speed is benchmark, is grounded the online detection of net extent of corrosion, is convenient to the technician and understands the corrosion present situation; All detected parameters and image make things convenient for technical specialist and managerial personnel to understand the safety and the operational factor of equipment by the 3G wireless transmission; And the duty of whole device can be adjusted to the best.
Description of drawings
Fig. 1 is annexation figure of the present utility model;
Fig. 2 is the sample graph of cathodic protection polarization curve of the present utility model and protection potential;
Fig. 3 is the work synoptic diagram of corrosion detecting line sensor;
Below in conjunction with accompanying drawing content of the present utility model is described in further detail.
Embodiment
The utility model combine closely the geographic position characteristics of transformer station and the defective of prior art based on potentiostat, are data processing tools with the computing machine; Develop online measuring ability on this basis, the online measuring ability of environmental baseline, data acquisition and processing capacity, the intelligent transformer substation grounding network special anti-corrosion erosion cathodic protector of 3G data and image wireless transfer function with ground net corrosion degree.
With reference to shown in Figure 1, this device is made up of potentiostat, corrosion on-line detector, Temperature Humidity Sensor, isolated amplifier, analog to digital converter, computing machine, host computer, 3G data and image transmission transmitter unit, remote detection client etc.Its connected mode be the signal that sends of potentiostat, corrosion on-line detector, Temperature Humidity Sensor through isolate through isolated amplifier amplify after, enter that analog to digital converter carries out A/D conversion and the result transformed and send on the computing machine, send to host computer respectively by single-chip microcomputer again and the 3G data are transmitted transmitter unit, remote detection client with image.
Wherein potentiostat has constant voltage, continuous current, three kinds of mode of operations of constant potential; potentiostat detects electric current, voltage signal by three electrode assemblies; be transferred to computing machine by amplifier; calculate function and draw polarization curve automatically; can automatic mistake find out protection potential as Fig. 2 computing machine, i.e. A point current potential can regularly be drawn 2 times polarization curve every day by program design; guarantee in Changes in weather the automatic adjusting of protection potential like this.Overprotection and under proteciton can not occur, realize that the protection degree reaches 90%.The monitoring target of corrosion monitor is to get actual grounded screen material to get 3m long, is embedded in the grounded screen gap, between it and the grounded screen reversing switch is arranged, during detection, disconnect with grounded screen, detection finishes and is connected with grounded screen, guarantees that the state of monitoring is identical with the etch state of actual grounded screen; Measure in the value that the locality is carried out between soil corrosion and the resistance multiplying power before the signal Processing.This measured value is deposited in the computer software, as the calculating benchmark of corrosion speed.What Temperature Humidity Sensor reacted is the temperature and humidity of soil, and under the different temperature humidity, the corrosion potential of grounded screen has very big-difference.Adjust the potentiostat output current according to different temperature humidity, reach best protection effect; 3G wireless data and image transmission transmitter unit has the collection and the processing capacity of data and image, and sends image and data to the remote detection client by emitter.
With reference to shown in Figure 3, the corrosion detecting line sensor adopts to be made with the metal of the identical material of grounded screen band steel, between grounded screen and corrosion measurement sensor reversing switch is arranged, and during detection, reversing switch is squeezed into detection.Then disconnect with former grounded screen, squeeze into operation, the reversing switch amount is gone into and the grounded screen connection status.Adopt four-end method to measure conductor resistance, promptly current terminal 1 and the current terminal 2 at measured conductor adds a current signal, the voltage difference of measuring between the conductors of two ends at voltage end 1 and voltage end 2, thus measure the conductor resistance of its grounded screen.
Grounding net of transformer substation the erosion of this intelligence grounded screen special anti-corrosion is installed and the supervising device course of work as follows:
At first lay the corrosion measurement sensor and the relation of the multiplying power of the corrosion of local soil and resistance is measured, then parameters is carried out correcting measuring, comprise reference potential, voltage and current, humiture, resistance etc.; Secondly above-mentioned parameter carries out analyzing and processing through isolated amplifier, analog to digital converter, single-chip microcomputer, shows at host computer according to certain calculation method, controls output current, voltage and the current potential of potentiostat simultaneously; Data after will handling at last and image 3G wireless data and image transmission transmitter unit are launched, and accept processing by the remote detection client, in the long-range purpose that detects and control that reaches.
When the temperature humidity of device changed, device was through computing adjustment output, thereby the work that guarantees is in optimum condition.
This covering device is applied at present at the scene, measures interface such as Fig. 4.Measuring the corrosion speed in somewhere, Shaanxi and the pass of resistance is
On Dec 22nd, 2008, output voltage, output current, output potential be respectively 5.1V, 5.8A ,-0.93V; On January 14th, 2009, the locality water of irrigating the fields immerses grounded screen, and this installs automatic computing and adjusts output voltage, output current, output potential, adjust output voltage, output current, output potential be respectively 2.7V, 3.3A ,-0.97V.July 22 days to 2009 Dec in 2008, the resistance multiplying power of measuring between 1.029-1.03, excavate grounded screen in July, 2009 after, do not find that grounded screen has evidence of corrosion, surface condition with imbed before no significant change; Show that this unit protection is respond well, the corrosion rate of resistance measurement is accurate.
Claims (3)
1. intelligent transformer substation grounding network anti-corrosion and supervising device, this device is by potentiostat, the corrosion detecting line sensor, Temperature Humidity Sensor, isolated amplifier, analog to digital converter, single chip computer device, host computer, 3G data and image transmission transmitter unit, compositions such as remote detection client, it is characterized in that, potentiostat, the corrosion detecting line sensor, the signal that Temperature Humidity Sensor sends is after isolating amplification through isolated amplifier, enter analog to digital converter and carry out the A/D conversion and result's conversion is sent to single-chip microcomputer, send to host computer and 3G data and image transmission transmitter unit respectively by single-chip microcomputer again, the remote detection client.
2. according to claims 1 described intelligent transformer substation grounding network anti-corrosion and supervising device, it is characterized in that described corrosion detecting line sensor comprises steel plate, is connected to terminal at the steel plate two ends, the wide 40-60mm of its light plate, thick 2-6mm, long is 4-6m.
3. intelligent transformer substation grounding network anti-corrosion according to claim 1 and supervising device is characterized in that, have reversing switch to be connected between resistance measurement sensor and the grounded screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200346682U CN201514391U (en) | 2009-09-22 | 2009-09-22 | Intelligent corrosion-resistant and monitoring device of transformer substation earthing network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200346682U CN201514391U (en) | 2009-09-22 | 2009-09-22 | Intelligent corrosion-resistant and monitoring device of transformer substation earthing network |
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| CN201514391U true CN201514391U (en) | 2010-06-23 |
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| CN2009200346682U Expired - Fee Related CN201514391U (en) | 2009-09-22 | 2009-09-22 | Intelligent corrosion-resistant and monitoring device of transformer substation earthing network |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105112921A (en) * | 2015-08-17 | 2015-12-02 | 国家电网公司 | Intelligent anti-corrosion protecting and monitoring system of grounding network |
| CN106245041A (en) * | 2016-10-11 | 2016-12-21 | 重庆工业自动化仪表研究所 | Cathode protection remote monitoring terminal based on Internet of things and control method thereof |
| WO2019050911A1 (en) * | 2017-09-07 | 2019-03-14 | Carrier Corporation | Corrosion protection system for heating ventalation air conditioning refrigeration |
| CN115679332A (en) * | 2021-07-29 | 2023-02-03 | 中国石油天然气股份有限公司 | Regional cathodic protection method and system |
-
2009
- 2009-09-22 CN CN2009200346682U patent/CN201514391U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105112921A (en) * | 2015-08-17 | 2015-12-02 | 国家电网公司 | Intelligent anti-corrosion protecting and monitoring system of grounding network |
| CN106245041A (en) * | 2016-10-11 | 2016-12-21 | 重庆工业自动化仪表研究所 | Cathode protection remote monitoring terminal based on Internet of things and control method thereof |
| CN106245041B (en) * | 2016-10-11 | 2018-08-24 | 重庆工业自动化仪表研究所 | Cathode protection remote monitoring terminal based on Internet of things and control method thereof |
| WO2019050911A1 (en) * | 2017-09-07 | 2019-03-14 | Carrier Corporation | Corrosion protection system for heating ventalation air conditioning refrigeration |
| CN111051572A (en) * | 2017-09-07 | 2020-04-21 | 开利公司 | Corrosion protection system for heating ventilation air-conditioning refrigeration |
| US11591697B2 (en) * | 2017-09-07 | 2023-02-28 | Carrier Corporation | Corrosion protection system for heating ventalation air conditioning refrigeration |
| CN115679332A (en) * | 2021-07-29 | 2023-02-03 | 中国石油天然气股份有限公司 | Regional cathodic protection method and system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Yan Aijun Inventor after: Ma Su Inventor after: Wang Sen Inventor after: Feng Lajun Inventor after: Guo Anxiang Inventor after: Xue Jun Inventor before: Yan Aijun Inventor before: Ma Su Inventor before: Wang Sen Inventor before: Feng Lajun Inventor before: Guo Anxiang Inventor before: Xue Jun |
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| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: SHAANXI ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140409 Owner name: SHAANXI ELECTRIC POWER RESEARCH INSTITUTE Effective date: 20140409 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 710054 XI'AN, SHAANXI PROVINCE TO: 100761 XICHENG, BEIJING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140409 Address after: 100761 West Chang'an Avenue, Beijing, No. 86, No. Patentee after: State Grid Corporation of China Patentee after: Shaanxi Electric Power Research Institute Address before: 710054 No. 308 Youyi East Road, Shaanxi, Xi'an Patentee before: Shaanxi Electric Power Research Institute |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100623 Termination date: 20170922 |