CN203745599U - Portable power transmission line external insulation monitoring device - Google Patents
Portable power transmission line external insulation monitoring device Download PDFInfo
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- CN203745599U CN203745599U CN201420121272.2U CN201420121272U CN203745599U CN 203745599 U CN203745599 U CN 203745599U CN 201420121272 U CN201420121272 U CN 201420121272U CN 203745599 U CN203745599 U CN 203745599U
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Abstract
The utility model provides a portable power transmission line external insulation monitoring device, which is characterized in that the portable power transmission line external insulation monitoring device comprises a focusing ultrasonic sensor (1), an impedance matcher (2), a signal amplifier (3), a compensation amplifier (4), a band pass filter (5), an A/D conversion unit (6), a microprocessor (7), a communication port (8), an LCD display unit (9), and a data memory unit (10); the focusing ultrasonic sensor (1), the impedance matcher (2), the signal amplifier (3), the compensation amplifier (4), the band pass filter (5) and the A/D conversion unit (6) are connected in order. the microprocessor (7) is respectively connected to the compensation amplifier (4), the A/D conversion unit (6), the communication port (8), the LCD display unit (9) and the data memory unit (10).
Description
Technical field
The utility model relates to transmission of electricity detection technique field, is specifically related to a kind of Portable power transmission line external insulation monitoring device.
Background technology
Insulator is the chief component parts of transmission line of electricity external insulation.Because long term exposure is in atmosphere; the Solid Suspension particulate existing in air can be deposited on the surface of insulator; accumulate over a long period and deposited one deck dunghill; while running into suitable weather conditions (as drizzle, dense fog, condensation etc.); the pollution layer of insulator surface makes moist and forms very thin conductive layer; the external insulation level of insulator is declined, cause occurring pollution flashover (hereinafter to be referred as pollution flashover) under rating operating voltage.In addition, the External Insulation Faults for Transmission Lines such as line ice coating also can cause transmission line of electricity failure of insulation, and then produce short circuit accident, and power grid security, stable operation in serious threat.Not only coverage is wide for External Insulation Faults for Transmission Lines, the duration is long, and the economic loss causing is very serious.According to statistics, although External Insulation Faults for Transmission Lines not as good as damage to crops caused by thunder frequent accident, caused causality loss is but ten times of damage to crops caused by thunder accident.
Along with expanding economy, the corresponding lifting of net capacity and electric pressure, environmental pollution day by day aggravate, and the incidence of the External Insulation Faults for Transmission Lines such as pollution flashover also increases day by day.There are altogether pollution flashover accident 1126 times in the transmission line of electricity of China, 1981-1990 reaches 1907 times between 1971-1980.Large area pollution flashover accident trans-regional after the nineties, Trans-Provincial/Municipal is more outstanding, and large area pollution flashover accident has all occurred on the ground such as the North China of nineteen ninety, the East China of 1996-1997, Liaoning of calendar year 2001, North China and Henan.The direct energy loss that pollution flashover accident causes and national economy loss are all very surprising.For example, " 3.16 " pollution flashover of Lanzhou electric power network in 1986, cause 14 circuits, 41 places that pollution flashover occurs, article 5,9 place's aerial earth wire broken strings of circuit, 3 place's conductor cord disconnections of 2 circuits, the whole network switch trip 106 times, 5 220kV transformer stations and 28 110kV transformer stations all have a power failure, 1 220kv transformer station part has a power failure, and Lanzhou electric power network and northwest major network off-the-line reach 5 hours, twice of power plant and system sectionalizing.In south China area, because the caused External Insulation Faults for Transmission Lines of line ice coating also happens occasionally.
The extensive anti-pollution flashover of preventive measure that adopts both at home and abroad, for example, adopt large distance anti-pollution insulator, increase sheet number, the painting Hydrophobic Coatings of insulator chain and the flushing etc. that has a power failure.Take after above-mentioned preventive measure, really reduced the incidence of External Insulation Faults for Transmission Lines, but the actual motion condition of insulator is very complicated, whether external insulation fault occurs jointly to be determined by the surperficial contamination of insulator or icing situation, humidity (meteorological condition) and working voltage three factors, external insulation fault is not eliminated from electrical network at all, and particularly since the nineties in 20th century, the pollution flashover accident of the fairly large trans-regional property of China's electrical network occurs day by day frequently.Therefore, carry out the research that External Insulation Faults for Transmission Lines monitoring technology is raised difficult questions in a deep going way, suppress to greatest extent the generation of external insulation fault, there is important practical significance.
Utility model content
In order to overcome above-mentioned technical disadvantages, the utility model provides a kind of Portable power transmission line external insulation monitoring device of novelty.
For achieving the above object, the technical solution adopted in the utility model provides a kind of Portable power transmission line external insulation monitoring device, comprise focused ultrasonic sensor 1, impedance matching box 2, signal amplifier 3, compensator-amplifier unit 4, bandpass filter 5, A/D converting unit 6, microprocessor 7, communication interface 8, LCD display unit 9 and data storage cell 10, focused ultrasonic sensor 1, impedance matching box 2, signal amplifier 3, compensator-amplifier unit 4, bandpass filter 5 is connected successively with A/D converting unit 6, microprocessor 7 and compensator-amplifier unit 4, A/D converting unit 6, communication interface 8, LCD display unit 9, data storage cell 10 connects respectively.
And, focused ultrasonic sensor 1 export transmission line of electricity electric discharge the corresponding electric signal of the ultrasonic signal that produces, after impedance matching box 2, output to successively signal amplifier 3, compensator-amplifier unit 4, compensator-amplifier unit 4 output compensation are amplified result to bandpass filter 5, A/D converting unit 6 is sent in the output of bandpass filter 5, microprocessor 7 is sent in the output of A/D converting unit 6, and microprocessor 7 is exported the strength of discharge of transmission line of electricity to LCD display unit 9.
And microprocessor 7 is exported the strength of discharge of transmission line of electricity and is sent into external PC through communication interface 8.
And microprocessor 7 is exported the strength of discharge of transmission line of electricity to data storage cell 10.
And described focused ultrasonic sensor 1 comprises ultrasonic sensor and parabola antenna, ultrasonic sensor is arranged on the focus place of parabola antenna.
And, impedance matching box 2 adopts field effect transistor FS70SM-2, signal amplifier 3 adopts instrument amplifier AD620, compensator-amplifier unit 4 adopts precision operational-amplifier OPA2277, bandpass filter 5 adopts filter chip MAX275, A/D change-over circuit 6 comprises A/D conversion chip ADS1286U and amplifier chip PGA309, microprocessor 7 adopts TMS320LF2407 chip, communication interface 8 adopts SN65HVD1050DR chip, LCD display unit 9 adopts liquid crystal touch screen TFT3224RS-3.5, and data storage cell 10 adopts CF card.
The combine closely reality of electric system of the device that the utility model provides, can effectively monitor the variation of electric transmission line isolator discharge scenario or external insulating strength, contribute to operation maintenance department to understand and grasp in time the running status of insulator, once find that transmission line of electricity external insulating strength is deteriorated, can send in time early warning signal, make related personnel take in time counter-measure, avoid generation and the development of External Insulation Faults for Transmission Lines, ensure the safety and stablization operation of electric system.The device that the utility model provides is specially adapted to the monitoring of 110kV above overhead transmission line external insulating strength and external insulation defect.
Brief description of the drawings
Fig. 1 is the circuit structure diagram of the utility model embodiment.
Fig. 2 is the A/D conversion unit circuit figure of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the utility model is described in further detail.
As shown in Figure 1, the utility model embodiment institute generator comprises focused ultrasonic sensor 1, impedance matching box 2, signal amplifier 3, compensator-amplifier unit 4, bandpass filter 5, A/D converting unit 6, microprocessor 7, communication interface 8, LCD display unit 9, data storage cell 10.Focused ultrasonic sensor 1, impedance matching box 2, signal amplifier 3, compensator-amplifier unit 4, bandpass filter 5 and A/D converting unit 6 are connected successively, and microprocessor 7 is connected respectively with compensator-amplifier unit 4, A/D converting unit 6, communication interface 8, LCD display unit 9, data storage cell 10.
Focused ultrasonic sensor 1 export transmission line of electricity electric discharge the corresponding electric signal of the ultrasonic signal that produces, after impedance matching box 2, output to successively signal amplifier 3, compensator-amplifier unit 4, compensator-amplifier unit 4 output compensation are amplified result to bandpass filter 5, A/D converting unit 6 is sent in the output of bandpass filter 5, microprocessor 7 is sent in the output of A/D converting unit 6, and microprocessor 7 is exported the strength of discharge of transmission line of electricity to LCD display unit 9.
When the utility model embodiment uses, principle of work is as follows:
Wherein focused ultrasonic sensor 1 is made up of 1 ultrasonic sensor and 1 parabola antenna for concentration ultrasonic; Focused ultrasonic sensor 1 changes the ultrasonic signal of the discharge generation on transmission line of electricity into electric signal, after impedance matching box 2, outputs to signal amplifier 3 and carries out signal amplification; The signal that compensator-amplifier unit 4 is exported signal amplifier 3 compensates amplification, make it to match with the measurement range of A/D converting unit 6 conversion chips used, then input tape bandpass filter 5, noise in elimination signal, finally send into A/D converting unit 6, A/D converting unit 6 is digital signal by analog-signal transitions and sends into microprocessor 7, the strength of discharge input LCD display unit 9 of the transmission line of electricity that microprocessor 7 obtains according to the corresponding ultrasonic signal of digital signal, shows by LCD display unit 9.When concrete enforcement, can highlight (being for example denoted as redness) to the strength of discharge of the transmission line of electricity that exceedes early warning value by LCD display unit 9, the external insulation of prompting transmission line of electricity goes wrong.Communication interface 8 communicates for Portable power transmission line external insulation monitoring device and PC, and the strength of discharge that microprocessor 7 is exported transmission line of electricity is sent into external PC through communication interface 8 and stored and further analyze.10 of data storage cells are used for the data that save set measures, and microprocessor 7 is exported the strength of discharge of transmission line of electricity and can be preserved to data storage cell 10.
The focused ultrasonic sensor 1 of the present embodiment is the sensor special of developing voluntarily, formed at ultrasonic sensor and the parabola antenna of 35kHz ~ 45kHz by frequency range, parabola antenna reflects by parabola, when concrete enforcement, its focusing parameter can reach optimum focusing effect design by 40kHz ultrasound wave.Ultrasonic sensor can adopt sensor of the prior art, is arranged on the focus place of parabola antenna, can make the sensitivity of ultrasonic sensor increase by 10 ~ 20dB.The output termination adaptation 2 of ultrasonic sensor.
When concrete enforcement, each unit can adopt existing chip.For example, impedance matching box 2 is field effect transistor FS70SM-2, signal amplifier 3 is instrument amplifier AD620, and compensator-amplifier unit 4 is precision operational-amplifier OPA2277, the 8 rank analogue active continuous time filter chip MAX275 that bandpass filter 5 can adopt maxim company to produce.
A/D change-over circuit 6 adopts A/D conversion chip ADS1286U to add amplifier chip PGA309 formation, and the output terminal of PGA309 is connected to the input end of ADS1286U.When concrete enforcement, amplifier chip PGA309 can, according to inputted range of signal, set enlargement factor, in conjunction with A/D conversion, to improve sampled measurements precision.The inner structure of A/D change-over circuit 6 is as shown in Fig. 2, the output end vo ut of PGA309, input end V+, the V-that Vfb is connected to ADS1286U, simulating signal enters through input end Vin1, the Vin2 of PGA309, and after conversion, gained digital signal is through output terminal Dout, the DCLK of ADS1286U output.The operating voltage of PGA309, ADS1286U is all 5V.
Microprocessor 7 adopts TMS320LF2407 chip to form, there is powerful data-handling capacity, the digital signal that can export according to A/D converting unit 6 obtains ultrasonic signal, obtains the strength of discharge of corresponding transmission line of electricity, according to the state that whether exceedes early warning value and provide transmission line of electricity external insulation.The pass of concrete ultrasonic signal and strength of discharge is prior art, and those skilled in the art can judge according to existing techniques in realizing analysis voluntarily.The utility model does not relate to the improvement of method, only requires the protection of hardware.
LCD display unit 9 adopts customization technical grade liquid crystal touch screen, and model is TFT3224RS-3.5, and working temperature is-30 DEG C ~ 60 DEG C, can meet the needs of outwork.
Communication interface 8 adopts SN65HVD1050DR chip, realizes the output of CAN industrial bus signal, and antijamming capability is strong.
Data storage cell 10 can adopt technical grade CF card, for example, adopt the CF5000 type industry CF card that Sandisk company produces to form, and has memory capacity large, shockproof power saving, and the advantage such as antijamming capability is strong, is adapted at working under severe outdoor environment.
Above content is the further description of the utility model being done in conjunction with concrete preferred implementation, is convenient to these those skilled in the art and can understands and apply the utility model, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, can also make without departing from the concept of the premise utility some simple deduction or replace, and needn't pass through performing creative labour.Therefore, those skilled in the art are according to announcement of the present utility model, and the simple modifications that the utility model is made all should be within protection domain of the present utility model.
Claims (6)
1. a Portable power transmission line external insulation monitoring device, it is characterized in that: comprise focused ultrasonic sensor (1), impedance matching box (2), signal amplifier (3), compensator-amplifier unit (4), bandpass filter (5), A/D converting unit (6), microprocessor (7), communication interface (8), LCD display unit (9) and data storage cell (10), focused ultrasonic sensor (1), impedance matching box (2), signal amplifier (3), compensator-amplifier unit (4), bandpass filter (5) is connected successively with A/D converting unit (6), microprocessor (7) and compensator-amplifier unit (4), A/D converting unit (6), communication interface (8), LCD display unit (9), data storage cell (10) connects respectively.
2. Portable power transmission line external insulation monitoring device according to claim 1, it is characterized in that: the electric discharge of focused ultrasonic sensor (1) output transmission line of electricity the corresponding electric signal of the ultrasonic signal that produces, after impedance matching box (2), output to successively signal amplifier (3), compensator-amplifier unit (4), compensator-amplifier unit (4) output compensation is amplified result to bandpass filter (5), A/D converting unit (6) is sent in the output of bandpass filter (5), microprocessor (7) is sent in the output of A/D converting unit (6), the strength of discharge of microprocessor (7) output transmission line of electricity is to LCD display unit (9).
3. Portable power transmission line external insulation monitoring device according to claim 2, is characterized in that: the strength of discharge of microprocessor (7) output transmission line of electricity is sent into external PC through communication interface (8).
4. Portable power transmission line external insulation monitoring device according to claim 2, is characterized in that: the strength of discharge of microprocessor (7) output transmission line of electricity is to data storage cell (10).
5. according to Portable power transmission line external insulation monitoring device described in claim 1 or 2 or 3 or 4, it is characterized in that: described focused ultrasonic sensor (1) comprises ultrasonic sensor and parabola antenna, ultrasonic sensor is arranged on the focus place of parabola antenna.
6. according to Portable power transmission line external insulation monitoring device described in claim 1 or 2 or 3 or 4, it is characterized in that: impedance matching box (2) adopts field effect transistor FS70SM-2, signal amplifier (3) adopts instrument amplifier AD620, compensator-amplifier unit (4) adopts precision operational-amplifier OPA2277, bandpass filter (5) adopts filter chip MAX275, A/D change-over circuit (6) comprises A/D conversion chip ADS1286U and amplifier chip PGA309, microprocessor (7) adopts TMS320LF2407 chip, communication interface (8) adopts SN65HVD1050DR chip, LCD display unit (9) adopts liquid crystal touch screen TFT3224RS-3.5, data storage cell (10) adopts CF card.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420121272.2U CN203745599U (en) | 2014-03-18 | 2014-03-18 | Portable power transmission line external insulation monitoring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420121272.2U CN203745599U (en) | 2014-03-18 | 2014-03-18 | Portable power transmission line external insulation monitoring device |
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| CN203745599U true CN203745599U (en) | 2014-07-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420121272.2U Expired - Fee Related CN203745599U (en) | 2014-03-18 | 2014-03-18 | Portable power transmission line external insulation monitoring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158332A (en) * | 2015-08-24 | 2015-12-16 | 河北吉信同普电子科技开发有限公司 | Ultrasonic detector |
| CN106093697A (en) * | 2016-05-27 | 2016-11-09 | 无锡太湖学院 | A kind of circuit monitoring system |
-
2014
- 2014-03-18 CN CN201420121272.2U patent/CN203745599U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158332A (en) * | 2015-08-24 | 2015-12-16 | 河北吉信同普电子科技开发有限公司 | Ultrasonic detector |
| CN106093697A (en) * | 2016-05-27 | 2016-11-09 | 无锡太湖学院 | A kind of circuit monitoring system |
| CN106093697B (en) * | 2016-05-27 | 2018-12-18 | 无锡太湖学院 | A kind of circuit monitoring system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20140730 Termination date: 20160318 |