CN214539346U - Converter transformer gas production rule monitoring device - Google Patents
Converter transformer gas production rule monitoring device Download PDFInfo
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- CN214539346U CN214539346U CN202120040113.XU CN202120040113U CN214539346U CN 214539346 U CN214539346 U CN 214539346U CN 202120040113 U CN202120040113 U CN 202120040113U CN 214539346 U CN214539346 U CN 214539346U
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Abstract
The utility model discloses a gas production law monitoring device of a converter transformer, which comprises a transformer oil tank and a detection control system, wherein the transformer oil tank is provided with a temperature sensor; the detection control system consists of an A/D conversion controller, a DSP controller, a display and a GPS communication module, the temperature sensor is electrically connected with the DSP controller through the A/D conversion controller, and the DSP controller is electrically connected with the display and the GPS communication module. The gas chromatogram state of the gas in the converter transformer oil can be reflected in real time by monitoring the temperature at the edge of the top end of the converter transformer oil tank, and a professional gas chromatogram measuring device or equipment does not need to be designed or purchased. And simultaneously, the utility model discloses can realize monitoring the temperature variation cloud picture at converter transformer oil tank top under the two-dimensional coordinate plane, guarantee real-time supervision converter transformer's temperature and produce the gas law in the oil, have precision height, the degree of accuracy is good, small, with low costs, simple to operate, maintain advantages such as simple and convenient.
Description
Technical Field
The utility model relates to an extra-high voltage direct current transmission field specifically is a gas production law monitoring of converter transformer oil.
Background
In recent years, the national economic construction has made a great deal of achievement, and the rapid economic development and the promotion of the national living standard promote the rapid development of the power industry, so that the scale of the power grid is gradually enlarged. Once the power grid has large-area power failure due to faults, the consequences are very serious, and huge loss can be caused to national economy. The power transformer is one of the core elements of the power system, and the safety of the power transformer is related to the first defense system for the normal and stable operation of the power grid. The transformer bears the tasks of transmission, conversion and the like of electric energy, is a pivot link of a power system, can seriously threaten the safe operation of a power grid once a fault occurs, the aging of the insulating property is a main reason for transformer accidents, and meanwhile, the actual service life of the transformer can be influenced by the insulating aging condition, so that the research on better transformer oil suitable for the power transformer has great significance in ensuring the more stable operation and longer service life of the power transformer and ensuring the safe and reliable operation of the power grid. The electrical and mechanical properties of transformer insulation systems are gradually degraded by the influence of electrical, thermal, mechanical, environmental factors, etc. it is known that aging of the insulation medium is a major cause of transformer accidents. Some power enterprises can technically improve or replace the transformer as long as the transformer runs for a certain period of time in order to ensure safe and reliable operation of the transformer, but blindly updating equipment cannot fully exploit the operation potential of the transformer and also causes economic waste. At present, the operation life of a certain part of transformers in China is more than twenty years, the service life of the transformers reaches the middle and later stages, the actual life of the transformers is greatly different due to the load and the operation environment of the transformers, certain insulation states are still good, certain transformers possibly age seriously, and the transformers in good insulation states need to continue to operate due to the fact that the price of a power transformer is high and the replacement of the transformers needs to pay high economic cost. Therefore, by using modern technology and analysis means, deep research can effectively reflect the characteristic parameters of transformer oil aging inside the transformer, further evaluate the insulation state of the transformer, discover hidden dangers existing in equipment as soon as possible, improve the operation capacity of the equipment and prolong the service life of the equipment, and the transformer oil aging test method becomes a hot spot concerned by the power industry and related departments and a technical problem which needs to be solved urgently.
With the development of information technology, sensor technology, digital signal processing, internet technology and artificial intelligence, a technical basis is provided for the development of transformer on-line monitoring and fault diagnosis, and the technology including digital computer acquisition technology, advanced sensors and the like is typically applied to transformer on-line monitoring, so that the monitoring efficiency and the monitoring precision of insulation parameters such as transformer dielectric loss, capacitance, leakage current, dissolved gas in oil and the like can be effectively improved, the real-time or timed monitoring of the running state of a transformer is realized, whether the transformer runs normally or not is judged in the first time, the transformer is used as a basis for fault diagnosis, and a power department is guided to select a correct method for equipment management and maintenance. At present, on-line monitoring methods for monitoring gas in one or more kinds of oil are researched at home and abroad. With the continuous progress and development of power equipment maintenance technology and means, various modern transformer online monitoring technologies appear in succession, and most of the monitoring technologies realize real-time control of the operation state and the fault of the transformer, investigation of fault signs and development trends and pre-diagnosis of the fault of the transformer by monitoring the dissolved gas in the transformer oil in real time and comparing the gas production rate and concentration change of the dissolved gas in the oil under the normal operation state of the transformer. And when the gas production rate and the concentration abnormal change of the dissolved gas in the oil reach certain thresholds, the fault alarm is realized. At the moment, the fault maintenance personnel can judge whether the transformer needs to be overhauled in a complete power failure mode, so that equipment accidents are avoided to the maximum extent, and the running reliability of the equipment is improved.
The converter transformer bears the important task of electric energy transmission in the extra-high voltage direct current transmission network, and the operation reliability of the converter transformer has very important significance to the whole system. Under the influence of leakage magnetic field of the converter transformer (the leakage magnetic flux of the converter transformer can reach more than 20% of the working magnetic flux during working), iron core and structural member materials, manufacturing and assembling process factors and the like, the problem that the box edge and box edge bolts of the converter transformer are overheated occurs, the overheated box edge and box edge bolts can cause local accelerated aging, oil leakage and the like of a sealing rubber gasket of the converter transformer, and the safe and stable operation of the converter transformer is seriously threatened.
In 2013, the temperature of the outer edge of a TRUM8657 main transformer high-voltage side box cover produced by Siemens of Germany entrusted to a certain power plant in 2013 is abnormally increased to 99.7 ℃, and then the maximum temperature reaches 162 ℃ after multiple measurements. A factory test is carried out after one 750kV autotransformer is assembled in 2016, and the problem of local overheating of the high-voltage side box edge and the low-voltage side box edge is found, wherein the high-voltage side is 113 ℃ and the low-voltage side is 123 ℃. In 6 months in 2018, a SSZ11-240000/220 type main transformer multi-position box produced by a certain company has overheating defects along bolts, and the highest temperature reaches 184 ℃. According to incomplete statistics, since 2000, the heating faults of the box edge and the box edge bolt of the power transformer are more than 100.
At present, converter transformer fault diagnosis mainly adopts measurement and analysis of the composition and content of dissolved gas, and scholars at home and abroad make corresponding judgment criteria: four-ratio, Rogcrs, HAE, Duval, Dorncnbung, and three-ratio. Along with the development of science and technology, the intelligent level of transformer on-line monitoring and fault diagnosis is also continuously improved, various standard program software and microprocessing technologies are also widely applied to monitoring, various data acquisition hardware, sensors, communication systems and transformer on-line monitoring and diagnosis equipment with an analysis function integrated are also continuously released, and the efficiency and the accuracy of transformer on-line monitoring and diagnosis are greatly improved.
However, these methods can only provide information after a fault occurs or abnormal operation of the transformer, and it is difficult to implement preventive and predictive monitoring of the transformer, and the monitoring, fault diagnosis and maintenance requirements of the smart grid on the power transformer cannot be met. On the other hand, the method has the defects of long consumption period, complex process and easy influence of human factors in the practical operation process. Meanwhile, the precision and the timeliness of the transformer monitoring and fault diagnosis technology are still to be improved. Based on the technical research on the online monitoring and diagnosis of the fault of the ultra/extra-high voltage converter transformer based on the shell force-heat characteristics, the project develops the electrical equipment running state monitoring and fault diagnosis equipment which is simple and convenient to develop and easy to operate.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a converter transformer produces gas law monitoring devices for realize the online monitoring of converter transformer temperature and the gas law of insulating oil production, guarantee converter transformer's reliable operation.
In order to achieve the above object, the utility model provides a following technical scheme: the gas production rule monitoring device of the converter transformer comprises a transformer oil tank and a detection control system, wherein a temperature sensor is arranged on the transformer oil tank; the detection control system consists of an A/D conversion controller, a DSP controller, a display and a GPS communication module, the temperature sensor is electrically connected with the DSP controller through the A/D conversion controller, and the DSP controller is electrically connected with the display and the GPS communication module.
Preferably, the number of the temperature sensors is twelve, and the temperature sensors are circumferentially arranged on the top of the transformer oil tank.
Preferably, a temperature collector is arranged in the temperature sensor, the temperature collector is connected with one end of a first resistor and a collector of the power triode, the other end of the first resistor is connected with a base of the power triode, a second resistor and an output end of the operational amplifier, and the first resistor and the power triode form a voltage regulator;
the emitting electrode of the power triode is connected with the second resistor, the third resistor and the output port, one end of the operational amplifier is connected with the third resistor and the fourth resistor, and the other end of the operational amplifier is connected with the ambient temperature collector;
the operational amplifier is connected with the ground through a voltage stabilizing diode.
The utility model provides a following use method: the temperature value monitored by the temperature sensor is sent to the A/D conversion controller, the DSP controller carries out intelligent calculation on the converter transformer meteorological spectrum curve stored in the DSP controller according to the temperature digital data converted by the A/D conversion controller to obtain the gas production rule of the converter transformer, the gas production rule is sent to the display to be displayed, and the gas production rule is fed back to the monitoring room of the converter station in real time through the GPS communication module to complete the real-time monitoring of the gas production rule of the converter transformer.
Preferably, the temperature signal of the temperature sensor collected by the temperature collector is converted into a voltage signal, the voltage signal is compared with the voltage signals output by the first resistor, the third resistor, the operational amplifier and the fourth resistor, the reference voltage formed by the second resistor and the voltage stabilizing diode is used for calibration, and the output voltage is adjusted by the power triode, so that the purpose of adjusting the ambient temperature deviation of the temperature signal of the temperature sensor is achieved.
Compared with the prior art, the beneficial effects of the utility model are that: the gas chromatogram state of the gas in the converter transformer oil can be reflected in real time by monitoring the temperature at the edge of the top end of the converter transformer oil tank, and a professional gas chromatogram measuring device or equipment does not need to be designed or purchased. And simultaneously, the utility model discloses the influence of ambient temperature deviation has been considered in the measurement of converter transformer oil tank top temperature, can realize monitoring the temperature variation cloud picture at converter transformer oil tank top under the two-dimensional coordinate plane, guarantees real-time supervision converter transformer's temperature and produces the gas law in the oil, has advantages such as precision height, the degree of accuracy is good, small, with low costs, simple to operate, maintenance are simple and convenient. The reliability of safe operation of the power grid and the transformer is improved, and the method has great practical significance to the whole power system.
Drawings
Fig. 1 is the structure schematic diagram of the gas production law monitoring device of the converter transformer.
Fig. 2 is the circuit schematic diagram of the gas production law monitoring device of the converter transformer.
1. A transformer tank; 2. a temperature sensor; 3. a temperature collector; 4. a first resistor; 5. a power transistor; 6. a second resistor; 7. an operational amplifier; 8. a third resistor; 9. an output port; 10. a fourth resistor; 11. an ambient temperature collector; 12. a voltage regulator diode; 13. grounding; 14. detecting a control system; 15. an A/D conversion controller; 16. a DSP controller; 17. a display; 18. and a GPS communication module.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: the gas production rule monitoring device of the converter transformer comprises a transformer oil tank 1 and a detection control system 14, wherein a temperature sensor 2 is arranged on the transformer oil tank 1; the detection control system 14 is composed of an A/D conversion controller 15, a DSP controller 16, a display 17 and a GPS communication module 18, the temperature sensor 2 is electrically connected with the DSP controller 16 through the A/D conversion controller 15, and the DSP controller 16 is electrically connected with the display 17 and the GPS communication module 18. The DSP controller 16 has data storage, analysis, processing, and communication functions. Temperature sensor 2's quantity is twelve, and temperature sensor 2 is circumference setting in transformer tank 1's roof edge to the temperature information on the transformer tank 1 is collected to the all-round.
A temperature collector 3 is arranged in the temperature sensor 2, the temperature collector 3 is connected with one end of a first resistor 4 and a collector electrode of a power triode 5, the other end of the first resistor 4 is connected with a base electrode of the power triode 5, a second resistor 6 and an output end of an operational amplifier 7, and the first resistor 4 and the power triode 5 form a voltage regulator;
an emitting electrode of the power triode 5 is connected with the second resistor 6, the third resistor 8 and the output port 9, one end of the operational amplifier 7 is connected with the third resistor 8 and the fourth resistor 10, and the other end of the operational amplifier 7 is connected with the ambient temperature collector 11; the operational amplifier 7 is connected to ground 13 via a zener diode 12.
The utility model also provides a use method: in order to realize the online monitoring of the gas production rule of the converter transformer, the temperature value monitored by the temperature sensor 2 is sent to the A/D conversion controller 15, the DSP controller 16 carries out intelligent calculation with the gas production rule curve of the converter transformer stored in the DSP controller 16 according to the temperature digital data converted by the A/D conversion controller 15, the gas production rule of the converter transformer is obtained and sent to the display 17 for display, and the gas production rule is fed back to the monitoring room of the converter station in real time through the GPS communication module 18, so that the real-time monitoring of the gas production rule of the converter transformer is completed. The utility model discloses can reflect gaseous meteorological chromatography state in the converter transformer oil in real time through the temperature of monitoring converter transformer oil tank top border department, need not design or purchase professional meteorological chromatography measuring device or equipment, guarantee the temperature of real-time supervision converter transformer and produce the gas law in the oil, have precision height, the degree of accuracy is good, small, with low costs, simple to operate, maintain advantages such as simple and convenient. The reliability of safe operation of the power grid and the transformer is improved, and the method has great practical significance to the whole power system.
The temperature signal of the temperature sensor 2 collected by the temperature collector 3 is converted into a voltage signal, the voltage signal is compared with the voltage signals output by the first resistor 4, the third resistor 8, the operational amplifier 7 and the fourth resistor 10, the reference voltage formed by the second resistor 6 and the voltage stabilizing diode 12 is used for calibration, the output voltage is adjusted by the power triode 5, and the purpose of adjusting the ambient temperature deviation of the temperature signal of the temperature sensor 2 is achieved. The utility model discloses the influence of ambient temperature deviation has been considered in the measurement of converter transformer oil tank top temperature, can realize monitoring the temperature variation cloud picture at converter transformer oil tank top under the two-dimensional coordinate plane, has the precision height, and the data real-time is good, advantages such as measuring area is wide.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. Converter transformer produces gas law monitoring devices, its characterized in that: the device comprises a transformer oil tank (1) and a detection control system (14), wherein a temperature sensor (2) is arranged on the transformer oil tank (1); the detection control system (14) consists of an A/D conversion controller (15), a DSP controller (16), a display (17) and a GPS communication module (18), the temperature sensor (2) is electrically connected with the DSP controller (16) through the A/D conversion controller (15), and the DSP controller (16) is electrically connected with the display (17) and the GPS communication module (18);
the number of the temperature sensors (2) is twelve, and the temperature sensors (2) are circumferentially arranged on the top of the transformer oil tank (1);
a temperature collector (3) is arranged in the temperature sensor (2), the temperature collector (3) is connected with one end of a first resistor (4) and a collector electrode of a power triode (5), the other end of the first resistor (4) is connected with a base electrode of the power triode (5), a second resistor (6) and an output end of an operational amplifier (7), and the first resistor (4) and the power triode (5) form a voltage regulator;
an emitter of the power triode (5) is connected with the second resistor (6), the third resistor (8) and the output port (9), one end of the operational amplifier (7) is connected with the third resistor (8) and the fourth resistor (10), and the other end of the operational amplifier (7) is connected with the ambient temperature collector (11);
the operational amplifier (7) is connected to ground (13) via a zener diode (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120040113.XU CN214539346U (en) | 2021-01-08 | 2021-01-08 | Converter transformer gas production rule monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120040113.XU CN214539346U (en) | 2021-01-08 | 2021-01-08 | Converter transformer gas production rule monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214539346U true CN214539346U (en) | 2021-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120040113.XU Active CN214539346U (en) | 2021-01-08 | 2021-01-08 | Converter transformer gas production rule monitoring device |
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| Country | Link |
|---|---|
| CN (1) | CN214539346U (en) |
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2021
- 2021-01-08 CN CN202120040113.XU patent/CN214539346U/en active Active
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