CN101930869A - High-voltage vacuum breaker with contact temperature measurement function and temperature measurement method thereof - Google Patents

High-voltage vacuum breaker with contact temperature measurement function and temperature measurement method thereof Download PDF

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Publication number
CN101930869A
CN101930869A CN2010102583317A CN201010258331A CN101930869A CN 101930869 A CN101930869 A CN 101930869A CN 2010102583317 A CN2010102583317 A CN 2010102583317A CN 201010258331 A CN201010258331 A CN 201010258331A CN 101930869 A CN101930869 A CN 101930869A
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CN
China
Prior art keywords
temperature measurement
contact
breaker
temperature
circuit
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Pending
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CN2010102583317A
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Chinese (zh)
Inventor
束龙胜
秦小州
宛玉超
唐荣保
刘权
孙磊
汪桂林
王聪
周正长
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Anhui Xinlong Electrical Co Ltd
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Anhui Xinlong Electrical Co Ltd
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Priority to CN2010102583317A priority Critical patent/CN101930869A/en
Publication of CN101930869A publication Critical patent/CN101930869A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a high-voltage vacuum breaker with contact temperature measurement function and a temperature measurement method thereof, and is characterized in that the primary main contact of the high-voltage vacuum breaker is provided with a temperature measurement device connected with a controlling device through an optical fiber transmission line; the primary contact temperature measurement signal of the breaker sent by the temperature measurement device is compared with data set in the controlling device to timely display and send over temperature alarming; and a breaker-breaking signal is sent when necessary. The structure and the method have following advantages that: 1, the equipotential technique is applied to high-voltage environment, a general temperature measurement sensor is used so that the product cost is controlled within several hundred yuan, and the seamless joint with the breaker is finished in a factory, which is convenient for commercialization, popularization and application; 2, the temperature measurement data is transmitted through optical fibers and is electrically insulated and isolated in high-voltage environment, thereby timely monitoring the temperature of the primary contact of the breaker and effectively preventing the contact from being burned due to overheat; 3, the temperature measurement technique is used to conventional products, thereby improving the technical content of products and increasing market competitiveness.

Description

A kind of high-pressure vacuum breaker and temp measuring method thereof with contact temperature measurement function
Technical field
The present invention relates to the electric power system High-tension Switch Devices, relate in particular to a kind of high-pressure vacuum breaker and temp measuring method thereof with contact temperature measurement function.
Background technology
Vacuum circuit-breaker is the main electric equipment in disjunction high-tension electricity loop, whether well the contact of its dynamic/static contact is the key link of support equipment reliability service, according to statistics, accidents happened has reason greatly to be to ablate because the dynamic/static contact connection place is loosening or loose contact and the junction surface that causes are overheated and cause for vacuum circuit-breaker, the ablation of contact has a time course, be not to have an accident immediately, before accidents happened, always have the temperature overheating omen, passing in time, heat accumulation on the contact is serious more, finally causes the accident.The temperature of online detection contact of breaker then is a kind of effective means of accident early warning, and when temperature surpassed a certain limit value, automatic early-warning prevented the generation of accident in advance.
Temperature detection for low-voltage grade (380V) switch cubicle often adopts methods such as platinum resistance, thermocouple, and these sensing elements are placed on the electrified body, and the temperature signal of electrified body is transformed into the signal of telecommunication, gives temperature monitor and detects.
But owing to be subjected to the influence of its dielectric strength can't adopt picture to detect the method for the charged body temperature degree of low pressure, temperature-sensing element is directly contacted with electrified body to the electrified body temperature of the above voltage levels of 6kV.For the contactless method of the normal employing of the temperature detection of voltage levels electrified body, as equipotential wireless transmission, schemes such as infrared measurement of temperature, fiber optic conduction.
Patent of invention (ZL200710190086.9) has disclosed a kind of high-voltage circuit-breaker cart, primary cut-out on this handcart adopts optical fiber temperature-measurement, near contact of circuit breaker, Fibre Optical Sensor is installed, come reduced temperature by hot spectrum, the real-time temperature on contact of monitoring breaker effectively avoids the contact overheated and burn out.At present, the cost of Fibre Optical Sensor is higher in the technique scheme, is difficult to large-scale penetration and promotion.
Summary of the invention
Technical problem to be solved by this invention is at the deficiencies in the prior art, a kind of high-pressure vacuum breaker and temp measuring method thereof with contact temperature measurement function is provided, make high-pressure vacuum breaker have safety, advantage such as economic, easy to maintenance, and be convenient to commercialization and apply.
For solving the problems of the technologies described above, technical scheme of the present invention is a kind of high-pressure vacuum breaker with contact temperature measurement function, it is characterized in that: main contacts of described high-pressure vacuum breaker is provided with temperature measuring equipment and is connected with control device by optical fiber transmission line
Described control device is used for receiving the data that circuit breaker one-time contact temperature measurement signal that temperature measuring equipment sends and control device be provided with and compares, and shows in real time and sends overtemperature alarm, sends the signal of breaking circuit breaker in case of necessity.Utilize the equipotential principle, thermometric adopts contact, can adopt conventional temperature transducer.Transfer of data adopts optical fiber, and finishes seamless connection with circuit breaker in factory.
Described temperature measuring equipment is made up of contact temperature-measuring transducer, current transformer, thermometric microprocessor and thermometric optical-electrical converter, described current transformer is sleeved on the circuit breaker one-time contact, its output is connected with the power end of contact temperature-measuring transducer with the thermometric microprocessor, as the power supply of temperature transducer and thermometric microprocessor, form the equipotential of thermometric link.The output of contact temperature-measuring transducer is connected with optical fiber transmission line as the control device of the signal is far passed to the place of safety with the thermometric optical-electrical converter by the thermometric microprocessor.
Described control device is made up of optical-electrical converter, control microprocessor and display circuit, off-limit alarm control circuit, overtemperature prote tripping operation control circuit; described optical-electrical converter is connected with display circuit, warning circuit, overtemperature prote tripping operation control circuit circuit by control microprocessor, and the protection trip circuit also is connected with the circuit breaker trip driving mechanism.
Described temperature measuring equipment is located on moving contact of vacuum circuit-breaker.
Described temperature measuring equipment is located on fixed contact of vacuum circuit-breaker.
Described contact temperature-measuring transducer is the integrated form semiconductor temperature sensor, and model is MAX6577.
The model of described thermometric microprocessor 5 is STC11F32.
A kind of temp measuring method with high-pressure vacuum breaker of contact temperature measurement function, this method comprises the following steps;
A) higher-pressure region thermometric step; The saturation characteristic power taking of instrument transformer is as the power supply of contact temperature-measuring transducer and thermometric microprocessor, the sampling of contact temperature-measuring sensor temperature, filtering, the thermometric microprocessor is with temperature signal converting digital pulse signal, change into light signal by optical-electrical converter, reach the place of safety control device in the optical transmission mode by optical fiber;
B) place of safety judgement, controlled step; Receiving optical signals is changed digital pulse signal show by control microprocessor, control microprocessor is compared the data of this signal and setting and is judged, carries out overtemperature alarm or overtemperature tripping operation respectively according to the result who judges.
The data of described setting are overtemperature alarm data and overtemperature tripping operation data.
A kind of high-pressure vacuum breaker and temp measuring method thereof with contact temperature measurement function owing to adopt said structure and temp measuring method, compared with prior art, has the following advantages; 1, the equipotential technology is applied under the hyperbaric environment, adopts conventional temperature transducer, the hardware cost of product is controlled in the hundreds of unit, and finish seamless connection with circuit breaker, be convenient to commercialization and apply in factory; 2, the temperature measurement data Optical Fiber Transmission is communicated with and electric High-Voltage Insulation is isolated, and the temperature on contact of monitoring breaker in real time effectively avoids the contact overheated and burn out, and is safe and reliable; 3, thermometry is applied on the traditional product, has promoted the technology content of traditional product, increase the market competitiveness.
Description of drawings
Temp measuring system structural representation in the high-pressure vacuum breaker that Fig. 1 has a contact temperature measurement function for the present invention is a kind of;
Fig. 2 is the high-pressure vacuum breaker structural representation with contact temperature measurement function;
Fig. 3, Fig. 4 are the high-pressure vacuum breaker temp measuring method FB(flow block) with contact temperature measurement function;
In Fig. 1, Fig. 2,1, temperature measuring equipment; 2, control device; 3, current transformer; 4, contact temperature-measuring transducer; 5, thermometric microprocessor; 6, thermometric optical-electrical converter; 7, optical fiber transmission line; 8, optical-electrical converter; 9, control microprocessor; 10, display circuit; 11, circuit breaker one-time contact; 12, contact of breaker arm; 13, off-limit alarm control circuit; 14, overtemperature prote tripping operation control circuit; 15, circuit breaker trip driving mechanism.
Embodiment
Contrast accompanying drawing below, by description to embodiment, to the effect of the mutual alignment between the shape of the specific embodiment of the present invention such as related each member, structure, the each several part and annexation, each several part and operation principle, temp measuring method etc., be described in further detail, inventive concept of the present invention, technical scheme had more complete, accurate and deep understanding to help those skilled in the art.
As shown in Figure 1 and Figure 2, a kind of high-pressure vacuum breaker with contact temperature measurement function, described high-pressure vacuum breaker one-time contact 11 is provided with temperature measuring equipment 1 and is connected with control device 2 by optical fiber transmission line 7, described control device 2, being used for receiving the data that one-time contact 11 temperature measurement signals that temperature measuring equipment 1 sends and control device 2 be provided with compares, show in real time and send overtemperature alarm, provide the overtemperature trip signal in case of necessity and drive 15 actions of circuit breaker trip mechanism.
Temperature measuring equipment 1 is installed on main contacts of circuit breaker, temperature measuring equipment 1 is made up of contact temperature-measuring transducer 4, current transformer 3, thermometric microprocessor 5 and thermometric optical-electrical converter 6, contact temperature-measuring transducer 4 is installed on the circuit breaker one-time contact 11, current transformer 3 is sleeved on the circuit breaker one-time contact arm 12, its output is connected with the power end of contact temperature-measuring transducer 4 with thermometric microprocessor 5, and the output of contact temperature-measuring transducer 4 is connected with optical fiber transmission line 7 with thermometric optical-electrical converter 6 by thermometric microprocessor 5.Control device 2 is made up of optical-electrical converter 8, control microprocessor 9 and display circuit 10, off-limit alarm control circuit 13, overtemperature prote tripping operation control circuit 14; optical-electrical converter 8 is connected with display circuit 10, off-limit alarm control circuit 13, overtemperature prote tripping operation control circuit 14 by control microprocessor 9, and protection trip circuit 14 also is connected with circuit breaker trip driving mechanism 15.Display circuit 10 shows the temperature value on the circuit breaker one-time contact 11 in real time, and when temperature was out-of-limit, control microprocessor 9 was sent signal connection off-limit alarm control circuit 13 and sent alarm signal.When the temperature overtemperature, control microprocessor 9 is sent signal and is connected circuit breaker trip driving mechanism 15 by overtemperature prote tripping operation control circuit 14, with the circuit breaker disjunction.
Temperature measuring equipment 1 is located on moving contact of vacuum circuit-breaker, also can be located on fixed contact of vacuum circuit-breaker according to the different structure of circuit breaker.The model of contact temperature-measuring transducer 4 is MAX6577, and the model of thermometric microprocessor 5 is STC11F32.
Contact temperature-measuring transducer 4 is installed on circuit breaker one-time contact arm 12, utilize the equipotential principle, special-purpose current transformer 3 is installed on one-time contact arm 12 simultaneously, when having electric current to flow through on the one-time contact arm 12, utilize the power supply of the saturation characteristic power taking of its instrument transformer,, do not have potential difference because of the two is in same current potential as contact temperature-measuring transducer 4 and thermometric microprocessor 5, so there is not the insulation breakdown problem in temperature element, can utilizes common contact-type temperature transducer 4; Establish low-power consumption thermometric microprocessor 5 at contact temperature-measuring transducer 4 places, temperature signal is converted to digital pulse signal, by optical fiber this pulse signal is reached control device 2 in " electrical safety district " in the optical transmission mode, be reduced to digital signal by optical-electrical converter 8 again, and after control microprocessor 9 digital processings, report to the police by display circuit 10 demonstrations or by off-limit alarm control circuit 13, finish by the signal transmission of high-voltage region to " electrical safety district ".
Ginseng Fig. 3, the sampling of step 10 thermometric, step 11 is with sampled value filtering, and step 12 is changed by thermometric microprocessor A/D, and by the thermometric optical-electrical converter temperature signal is converted to light pulse signal.Step 13 sends light pulse signal by optical fiber, is back to step 10 after the execution of step 13.
Referring to Fig. 4, step 20 receives light pulse signal, and step 21 is the signal of telecommunication by optical-electrical converter reduction light pulse signal.Step 22 is by control microprocessor displays temperature value.Whether step 23 judges the displays temperature value greater than overtemperature tripping operation set point, if then enter step 24 and drive the tripping relay action, if not, then enter step 25 and whether judge the displays temperature value, if then enter step 26 and drive the alarm relay action greater than the set point of reporting to the police.Be back to step 20 after the execution of step 26.
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; obviously the invention specific implementation is not subjected to the restriction of aforesaid way; as long as adopted the method design of invention and the improvement of the various unsubstantialities that technical scheme is carried out; or design of the present invention and technical scheme are directly applied to other occasion without improving, all within protection scope of the present invention.

Claims (9)

1. high-pressure vacuum breaker with contact temperature measurement function, it is characterized in that: main contacts of described high-pressure vacuum breaker is provided with temperature measuring equipment (1) and is connected with control device (2) by optical fiber transmission line (7),
Described control device (2) is used for receiving the data that circuit breaker one-time contact (11) temperature measurement signal that temperature measuring equipment (1) sends and control device (2) be provided with and compares, and shows in real time, and sends overtemperature alarm, provides the overtemperature trip signal in case of necessity.
2. a kind of high-pressure vacuum breaker according to claim 1 with contact temperature measurement function, it is characterized in that: described temperature measuring equipment (1) is by contact temperature-measuring transducer (4), current transformer (3), thermometric microprocessor (5) and thermometric optical-electrical converter (6) are formed, described current transformer (3) is sleeved on the circuit breaker one-time contact arm (12), its output is connected with the power end of contact temperature-measuring transducer (4) with thermometric microprocessor (5), and the output of contact temperature-measuring transducer (4) is connected with optical fiber transmission line (7) with thermometric optical-electrical converter (6) by thermometric microprocessor (5).
3. a kind of high-pressure vacuum breaker according to claim 1 with contact temperature measurement function; it is characterized in that: described control device (2) is by optical-electrical converter (8); control microprocessor (9) and display circuit (10); off-limit alarm control circuit (13); overtemperature prote tripping operation control circuit (14) is formed; described optical-electrical converter (8) is by control microprocessor (9) and demonstration (10) circuit; warning circuit (13); overtemperature prote tripping operation control circuit (14) circuit is connected, and protection trip circuit (14) also is connected with circuit breaker trip driving mechanism (15).
4. a kind of high-pressure vacuum breaker with contact temperature measurement function according to claim 1 and 2 is characterized in that: described temperature measuring equipment (1) is located on moving contact of vacuum circuit-breaker.
5. a kind of high-pressure vacuum breaker with contact temperature measurement function according to claim 1 and 2 is characterized in that: described temperature measuring equipment (1) is located on fixed contact of vacuum circuit-breaker.
6. a kind of high-pressure vacuum breaker with contact temperature measurement function according to claim 2 is characterized in that: described contact temperature-measuring transducer (4) is the integrated form semiconductor temperature sensor, and model is MAX6577.
7. a kind of high-pressure vacuum breaker with contact temperature measurement function according to claim 2 is characterized in that: the model of described thermometric microprocessor (5) is STC11F32.
8. temp measuring method with high-pressure vacuum breaker of contact temperature measurement function as claimed in claim 1, this method comprises the following steps:
A) higher-pressure region thermometric step; The saturation characteristic power taking of instrument transformer is as the power supply of contact temperature-measuring transducer and thermometric microprocessor, the sampling of contact temperature-measuring sensor temperature, filtering, the thermometric microprocessor is with temperature signal converting digital pulse signal, change into light signal by optical-electrical converter, reach the place of safety control device in the optical transmission mode by optical fiber;
B) place of safety judgement, controlled step; Receiving optical signals is changed digital pulse signal show by control microprocessor, control microprocessor is compared the data of this signal and setting and is judged, carries out overtemperature alarm or overtemperature tripping operation respectively according to the result who judges.
9. the described according to Claim 8 temp measuring method with high-pressure vacuum breaker of contact temperature measurement function is characterized in that, the data of described setting are overtemperature alarm data and overtemperature tripping operation data.
CN2010102583317A 2010-08-17 2010-08-17 High-voltage vacuum breaker with contact temperature measurement function and temperature measurement method thereof Pending CN101930869A (en)

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102522270A (en) * 2011-12-16 2012-06-27 张健 Power supply switching device with heat protection device of main contact terminal circuit
CN104332964A (en) * 2014-11-26 2015-02-04 哈尔滨理工大学 Over-temperature protection device of plug type breaker and based on direct temperature measurement
CN104515935A (en) * 2013-10-08 2015-04-15 国家电网公司 Electrical box and discharging detection alarm method thereof
CN104681367A (en) * 2015-02-11 2015-06-03 国家电网公司 Automatic tripping device and method adopting optical-fiber infrared control over thermal failure of power isolating switch
CN105371983A (en) * 2015-12-15 2016-03-02 河海大学常州校区 Optical fiber temperature measuring device for measuring contact temperature of breaker contact arm

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JP2002034165A (en) * 2000-07-14 2002-01-31 Nippon Yusoki Co Ltd Safety device for charging battery-operated forklift
CN101046413A (en) * 2007-04-27 2007-10-03 福州大学 Built-in fiber temperature signal transmission device of medium and high pressure system
CN201096542Y (en) * 2007-07-05 2008-08-06 保定市屹高电气有限公司 Optical fibre type temperature on-line monitoring system
CN101319938A (en) * 2008-07-08 2008-12-10 周骁威 On-line temperature measurement method and device for cable joint of high-voltage plant
JP2009038925A (en) * 2007-08-02 2009-02-19 Sanyo Electric Co Ltd Power supply unit for vehicle, and control method thereof
CN101782438A (en) * 2009-01-20 2010-07-21 鞍山市融庭科技开发有限公司 Wireless temperature monitoring system device of overheating of electrical device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002034165A (en) * 2000-07-14 2002-01-31 Nippon Yusoki Co Ltd Safety device for charging battery-operated forklift
CN101046413A (en) * 2007-04-27 2007-10-03 福州大学 Built-in fiber temperature signal transmission device of medium and high pressure system
CN201096542Y (en) * 2007-07-05 2008-08-06 保定市屹高电气有限公司 Optical fibre type temperature on-line monitoring system
JP2009038925A (en) * 2007-08-02 2009-02-19 Sanyo Electric Co Ltd Power supply unit for vehicle, and control method thereof
CN101319938A (en) * 2008-07-08 2008-12-10 周骁威 On-line temperature measurement method and device for cable joint of high-voltage plant
CN101782438A (en) * 2009-01-20 2010-07-21 鞍山市融庭科技开发有限公司 Wireless temperature monitoring system device of overheating of electrical device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102522270A (en) * 2011-12-16 2012-06-27 张健 Power supply switching device with heat protection device of main contact terminal circuit
CN104515935A (en) * 2013-10-08 2015-04-15 国家电网公司 Electrical box and discharging detection alarm method thereof
CN104332964A (en) * 2014-11-26 2015-02-04 哈尔滨理工大学 Over-temperature protection device of plug type breaker and based on direct temperature measurement
CN104332964B (en) * 2014-11-26 2018-04-24 哈尔滨理工大学 Plug-pull type breaker overtemperature protection system based on direct temperature detection
CN104681367A (en) * 2015-02-11 2015-06-03 国家电网公司 Automatic tripping device and method adopting optical-fiber infrared control over thermal failure of power isolating switch
CN104681367B (en) * 2015-02-11 2016-08-17 国家电网公司 The optical fiber infrared of power disconnecting switch hot stall controls trip free device and method
CN105371983A (en) * 2015-12-15 2016-03-02 河海大学常州校区 Optical fiber temperature measuring device for measuring contact temperature of breaker contact arm

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Application publication date: 20101229