CN104898032A - Fault detection apparatus of distribution network switch cabinet - Google Patents
Fault detection apparatus of distribution network switch cabinet Download PDFInfo
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- CN104898032A CN104898032A CN201510308839.6A CN201510308839A CN104898032A CN 104898032 A CN104898032 A CN 104898032A CN 201510308839 A CN201510308839 A CN 201510308839A CN 104898032 A CN104898032 A CN 104898032A
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- distribution switch
- switch cubicle
- ultraviolet light
- failure detector
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Abstract
Disclosed in the invention is a fault detection apparatus of a distribution network switch cabinet. The fault detection apparatus is characterized in that two ultraviolet light transducers and three optic fiber temperature sensors are respectively installed inside a cabinet body of each distribution network switch cabinet. When data are extracted, the data interfaces of the ultraviolet light transducers and the optic fiber temperature sensors are connected to a hand-held detection host to carry out data determination and reading. On the basis of the structure, the local flashover and abnormal conductor temperature rise as the main representation forms of hidden fault trouble of the distribution network switch cabinet can be controlled warned in advanced, so that the development process of distribution network automation of the power company is enhanced to the new stage of active in-advance foreseeing from the passive after-event trouble shooting. Therefore, the utilization of the apparatus can promote development of establishment of safety operation of the intelligent power grid of the state well.
Description
Technical field
The present invention relates to the fault detect of distribution switch cubicle, particularly a kind of failure detector of distribution switch cubicle.
Background technology
Along with the swift and violent growth of China's economy, the need for electricity of every profession and trade also increases severely with day.Stable and the safety of power matching network power transmission, directly having influence on the economic development of each Electricity customers, is pull one hair and move the whole body.
Current high voltage fault originates from the shelf depreciation flashover of equipment mostly, and therefore the method for power industry detection shelf depreciation is a lot.Popular at present have ultraviolet image method, supercritical ultrasonics technology and ultrahigh frequency method etc.These detection methods have respective advantage in different, but or because reliability is poor, or cannot popularize because relative cost is higher.And be all be fixed on distribution inside switch cabinet, bring very big inconvenience to digital independent, in the future maintenance.
For the problems referred to above, provide a kind of novel portable failure detector, accurately, timely to distribution switch cubicle detect be prior art need solve problem.
Summary of the invention
Technical matters to be solved by this invention is, provides a kind of failure detector of distribution switch cubicle.
For achieving the above object, technical scheme of the present invention is, a kind of failure detector of distribution switch cubicle, is characterized in that: described pick-up unit be each distribution switch cubicle cabinet in two ultraviolet light transducers and three fibre optic temperature sensors are installed respectively; When extracting data, the data-interface of ultraviolet light transducer and fibre optic temperature sensor is connected to the enterprising row data of portable detection main frame and judges and read.
Described detection main frame changes into electric signal by photoelectric conversion module the light signal of ultraviolet light transducer and fibre optic temperature sensor, electric signal is amplified, the AD sample circuit of access device master controller, by AD sampling A/D chip, the early warning relatively set and alarm threshold value, judge distribution switch cabinet equipment fault when exceeding threshold values.
Described detection main frame is provided with liquid crystal display and acousto-optic warning unit.
Described ultraviolet light transducer respectively fills one up and down at busbar.
Described fibre optic temperature sensor is attached on the sleeve pipe of every bar bus, and contrast detects the temperature of each phase bus.
The shell of described detection main frame is metal shell.
Described fibre optic temperature sensor is connected with detection main frame by optical fiber or 485 lines.
A kind of failure detector of distribution switch cubicle, owing to adopting above-mentioned structure, the present invention can realize putting flashover and electric conductor overheating in advance control and an early warning to the office of the main forms of distribution switch cubicle potential faults, the development process of Utilities Electric Co.'s distribution automation is made to have risen to the aggressive new stage in advance predicted from the troubleshooting afterwards that passiveness is passive, for construction and the safe operation of national intelligent grid, there is important impetus.
Embodiment
In distribution switch cubicle, due to the defect that electrode and insulating surface exist, electric discharge in various degree can be there is.According to the difference of electric field intensity, can in succession produce corona, flashover or electric arc, generally, the principal mode of ionization or corona, only have when flashover or electric arc occur the Shi Caihui that be worse off, now can be regarded as even more serious, put close to the office of fault critical point.And this optical phenomena this project potential faults that will catch just, to reach the object of promptly and accurately early warning and maintaining.
Office electric discharge from process in, the electronics in air constantly obtains and releases energy, and when electronics releases energy, be attended by luminous radiation phenomenon, its radiation spectrum comprises visible ray, infrared ray, ultraviolet.When wherein UV radiation is propagated in an atmosphere, decay is less, and the ultraviolet of day-old chick is not vulnerable to the interference of environmental factor, comparatively stable, so select UV radiation as the characteristic quantity of Partial Discharge Detection, is the extremely effective means of one.
And Fiber Optic Pyrometer is very ripe, distributed and fibre optic temperature sensor that is phosphor dot configuration is obtained in all trades and professions of developed country to be applied widely.Optical fiber temperature-measurement sensing head is highly sensitive, non-active operation, adopts light sensing and optical transport mode completely, temperature detection and Signal transmissions same optical fiber, not by electromagnetic interference (EMI), and essential safety insulation, explosion-proof lightning protection.System is installed very easy, and scene only needs to be fixed on by sensor fibre on point for measuring temperature and easily can complete installment work, is highly suitable for the occasion of high voltage, strong-electromagnetic field and bad environments.
Fluorescence point type fibre optic temperature sensor adopts fiber optic transmission temperature signal, there are excellent insulating property, can high pressure in isolating switch cabinet, therefore fibre optic temperature sensor can directly be installed on the high-voltage contact in switch cubicle, prepare the running temperature measuring high-voltage contact, realize the detection of switch cubicle contact running temperature.
Concrete, the present invention be each distribution switch cubicle cabinet in two ultraviolet light transducers and three fibre optic temperature sensors are installed respectively; When extracting data, the data-interface of ultraviolet light transducer and fibre optic temperature sensor is connected to the enterprising row data of portable detection main frame and judges and read.
Detect main frame, by photoelectric conversion module, the light signal of ultraviolet light transducer and fibre optic temperature sensor is changed into electric signal, electric signal is amplified, the AD sample circuit of access device master controller, by AD sampling A/D chip, the early warning relatively set and alarm threshold value, judge distribution switch cabinet equipment fault when exceeding threshold values.Detect main frame and be provided with liquid crystal display and acousto-optic warning unit.
Ultraviolet light transducer respectively fills one up and down at busbar.Fibre optic temperature sensor is attached on the sleeve pipe of every bar bus, and contrast detects the temperature of each phase bus.The shell detecting main frame is metal shell.
The present invention is made up of photoelectric conversion module, device master controller, power module, communication module, liquid crystal display and acousto-optic warning unit etc.Peripheral ultraviolet light office side sensor module, fibre optic temperature sensor are all arranged in switch cubicle.
The ultraviolet major part wavelength that body surface shelf depreciation produces, in the region of 250 ~ 400mm, also has fraction wavelength at 160 ~ 280mm.Also containing ultraviolet in sunshine, but the part that wavelength is less than 250mm is almost all relatively unabsorbed by ozone, and is called solar blind.In order to remove the interference of visible light source, the ultraviolet light transducer of this project development adopts highly sensitive day-old chick ultraviolet light sensing tube, detects the ultraviolet radiation that shelf depreciation flashover produces.
Ultraviolet light office side sensor receives ultraviolet light pulse, is converted to the current pulse signal of negative sense, through preposition reverse scaling circuit, obtains forward voltage signal.Carry out filtering process again, make it by Hi-pass filter, filtering low-frequency disturbance.In order to meet the input requirements of AD sample circuit, also need to carry out forward and amplify adjustment, then analog to digital conversion is carried out, finally signal is delivered to microprocessor, pass through program design, the signal exceeding certain level value is recorded as pulsatile once, in official hour, if overall pulse number has exceeded the early warning threshold values preset, then the critical point that flashover reaches potential faults is put in the office of being judged to be, system starts reports to the police, and is presented on liquid crystal display by the data of record, data are retained in storage card or in FLASH, can read to come PC and arrange statistics again after patrolling and examining end.
Fibre optic temperature sensor can be connected with detection main frame by the multiple interfaces such as optical fiber or 485 lines, according to the accumulation of operating experience and historical data, temperature anomaly for some position accident equipment in latent period raises carries out early warning, may be displayed on liquid crystal display simultaneously, can read after patrolling and examining end and come PC and arrange statistics again.
Because equipment in distribution network cabinet is complicated, narrow space, so sensor will be convenient to install, its size and shape all will reasonably design, and adopts totally enclosed betal can, plays well anti-strongly disturbing shielding action.
Design of the present invention will take into full account function, relation between performance and portability, makes it meet the easy requirement of precision, environment for use, service time and operation, and this needs in circuit, structure, interface, power supply and power consumption etc., carry out coordinations consideration.
By fully research and demonstration, the present invention has that antijamming capability is strong, rate of false alarm is low, sensitivity advantages of higher.In addition, adopt ultraviolet light transducer as system headend, both cost was significantly less than expensive ultraviolet imager, and can realizing again plays a game puts the detection with temperature rise, in power matching network switch cubicle, have great application value.
Above to invention has been exemplary description; obvious specific implementation of the present invention is not subject to the restrictions described above; as long as have employed the various improvement that technical solution of the present invention is carried out, or directly apply to other occasion, all within protection scope of the present invention without improving.
Claims (7)
1. a failure detector for distribution switch cubicle, is characterized in that: described pick-up unit be each distribution switch cubicle cabinet in two ultraviolet light transducers and three fibre optic temperature sensors are installed respectively; When extracting data, the data-interface of ultraviolet light transducer and fibre optic temperature sensor is connected to the enterprising row data of portable detection main frame and judges and read.
2. the failure detector of a kind of distribution switch cubicle according to claim 1, it is characterized in that: described detection main frame changes into electric signal by photoelectric conversion module the light signal of ultraviolet light transducer and fibre optic temperature sensor, electric signal is amplified, the AD sample circuit of access device master controller, by AD sampling A/D chip, the early warning relatively set and alarm threshold value, judge distribution switch cabinet equipment fault when exceeding threshold values.
3. the failure detector of a kind of distribution switch cubicle according to claim 1, is characterized in that: described detection main frame is provided with liquid crystal display and acousto-optic warning unit.
4. the failure detector of a kind of distribution switch cubicle according to claim 1, is characterized in that: described ultraviolet light transducer respectively fills one up and down at busbar.
5. the failure detector of a kind of distribution switch cubicle according to claim 1, is characterized in that: described fibre optic temperature sensor is attached on the sleeve pipe of every bar bus, and contrast detects the temperature of each phase bus.
6. the failure detector of a kind of distribution switch cubicle according to claim 1 and 2, is characterized in that: the shell of described detection main frame is metal shell.
7. the failure detector of a kind of distribution switch cubicle according to claim 1, is characterized in that: described fibre optic temperature sensor is connected with detection main frame by optical fiber or 485 lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510308839.6A CN104898032A (en) | 2015-06-05 | 2015-06-05 | Fault detection apparatus of distribution network switch cabinet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510308839.6A CN104898032A (en) | 2015-06-05 | 2015-06-05 | Fault detection apparatus of distribution network switch cabinet |
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| CN104898032A true CN104898032A (en) | 2015-09-09 |
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| CN201510308839.6A Pending CN104898032A (en) | 2015-06-05 | 2015-06-05 | Fault detection apparatus of distribution network switch cabinet |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849639A (en) * | 2015-06-09 | 2015-08-19 | 安徽罗伯特科技股份有限公司 | System for online monitoring of partial discharge flashover of distribution network based on technology of ultraviolet light detection |
| CN110187244A (en) * | 2019-04-30 | 2019-08-30 | 国网山西省电力公司电力科学研究院 | A kind of fault detection means and method for switchgear |
| CN110307917A (en) * | 2019-08-01 | 2019-10-08 | 北京航天发射技术研究所 | A kind of Distributed Measurement System and measurement method for thermal environment |
| CN112255517A (en) * | 2020-11-18 | 2021-01-22 | 云南电网有限责任公司临沧供电局 | Local discharge and temperature combined online monitoring system of switch cabinet |
| CN116298737A (en) * | 2023-05-24 | 2023-06-23 | 广东电网有限责任公司佛山供电局 | Switch cabinet discharge monitoring system, method and equipment |
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| DE10000402A1 (en) * | 2000-01-07 | 2001-07-12 | Inst Maschinen Antriebe Und El | Electromagnetic field strength distribution representation device uses absorber foil converting HF energy into heat detected by temperature sensor matrix |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849639A (en) * | 2015-06-09 | 2015-08-19 | 安徽罗伯特科技股份有限公司 | System for online monitoring of partial discharge flashover of distribution network based on technology of ultraviolet light detection |
| CN110187244A (en) * | 2019-04-30 | 2019-08-30 | 国网山西省电力公司电力科学研究院 | A kind of fault detection means and method for switchgear |
| CN110307917A (en) * | 2019-08-01 | 2019-10-08 | 北京航天发射技术研究所 | A kind of Distributed Measurement System and measurement method for thermal environment |
| CN110307917B (en) * | 2019-08-01 | 2020-10-30 | 北京航天发射技术研究所 | Distributed measurement system and measurement method for thermal environment |
| CN112255517A (en) * | 2020-11-18 | 2021-01-22 | 云南电网有限责任公司临沧供电局 | Local discharge and temperature combined online monitoring system of switch cabinet |
| CN116298737A (en) * | 2023-05-24 | 2023-06-23 | 广东电网有限责任公司佛山供电局 | Switch cabinet discharge monitoring system, method and equipment |
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Application publication date: 20150909 |