CN109507556A - MDS type switchgear fault detection alarm device - Google Patents

MDS type switchgear fault detection alarm device Download PDF

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Publication number
CN109507556A
CN109507556A CN201811622702.8A CN201811622702A CN109507556A CN 109507556 A CN109507556 A CN 109507556A CN 201811622702 A CN201811622702 A CN 201811622702A CN 109507556 A CN109507556 A CN 109507556A
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CN
China
Prior art keywords
type switchgear
sensor
mds type
fault detection
mds
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811622702.8A
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Chinese (zh)
Inventor
崔涛
杜乐春
王振升
孙玉波
付联山
蒋茂磊
张吉平
宋笑梅
胡晶晶
李文磊
郭宏杰
刘洪斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Shandong Electric Power Co Gaomi Power Supply Co
State Grid Corp of China SGCC
Original Assignee
State Grid Shandong Electric Power Co Gaomi Power Supply Co
State Grid Corp of China SGCC
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Application filed by State Grid Shandong Electric Power Co Gaomi Power Supply Co, State Grid Corp of China SGCC filed Critical State Grid Shandong Electric Power Co Gaomi Power Supply Co
Priority to CN201811622702.8A priority Critical patent/CN109507556A/en
Publication of CN109507556A publication Critical patent/CN109507556A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00Investigating or analyzing materials by the use of thermal means
    • G01N25/72Investigating presence of flaws

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Testing Relating To Insulation (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
  • Locating Faults (AREA)

Abstract

The invention discloses a kind of MDS type switchgear fault detection alarm devices, including MDS type switchgear, ultrasonic sensor, ultrahigh frequency partial discharge sensor, infrared temperature probe are installed in MDS type switchgear, ultrasonic sensor, ultrahigh frequency partial discharge sensor, infrared temperature probe signal output end be electrically connected respectively with on-Line Monitor Device, the signal output end of on-line measuring device is electrically connected with backstage warning system.Ultrasound examination, three kinds of infrared measurement of temperature, Partial Discharge Detection means are used in the present invention simultaneously, and real-time diagnosis is carried out using on-line measuring device comprehensive analysis processing, can judge whether MDS type inside switch cabinet occurs generating heat or spark tracking in time, once there is accident sign, related personnel is arranged to go to in-situ processing in time, compared to hand-held artificial detection, accident judges more accurate, and status monitoring is more efficient.

Description

MDS type switchgear fault detection alarm device
Technical field
The present invention relates to a kind of MDS type switchgear fault detection alarm devices.
Background technique
Become in substation MDS type switchgear the facilities such as arrester, voltage transformer because poor sealing, high temperature dampness reason are easy Discharge short, hyperthermia and superheating defect occurs.Current transformer substation high-tension switch cabinet is there is not yet the states such as installation partial discharge detection are examined Disconnected device, especially MDS type switchgear do not consider the application of live detection means, and the model switchs because the date of manufacture is more early Internal discharge accident easily occurs for cabinet, influences serious.Currently employed hand-held type local-discharge tester or infrared tester carry out band electric-examination Survey, there is following items drawback: first is that higher to personnel specialty competency profiling, various live detection method study are at high cost;Second is that Height is required to tour vacuum phase, only high-frequency tour could find the accident defaults such as internal discharge or overheat in time;Third is that every Secondary make an inspection tour detects that one time consuming time is long to all switchgears, and detection efficiency is low, easy test leakage.
Summary of the invention
This technical problem to be solved in the present invention is to provide one kind can go up installation condition real-time diagnosis switch cabinet state and and When the MDS type switchgear fault detection alarm device that alerts.
In order to solve the above technical problems, the present invention includes MDS type switchgear, it is structurally characterized in that the MDS type switchgear Ultrasonic sensor, ultrahigh frequency partial discharge sensor, infrared temperature probe, the ultrasonic sensor, hyperfrequency are inside installed Partial discharge sensor, infrared temperature probe signal output end be electrically connected respectively with on-Line Monitor Device, on-line checking dress The signal output end set is electrically connected with backstage warning system.
The ultrasonic sensor, ultrahigh frequency partial discharge sensor, infrared temperature probe are respectively equipped with signal condition list Member.
The array number of the ultrasonic sensor is 7, and array element centre distance is 5mm, the length and width phase of the array element Deng.
The ultrasonic sensor is close to setting, the MDS type switchgear on the inside of MDS type switchgear and is made of steel plate, institute It states ultrasonic sensor and passes through magnet fastening on MDS type switchgear.
The resonance frequency of the ultrahigh frequency partial discharge sensor is 20-180kHz, and sensitivity is 85 [- 75] V (m/s) [V/ Ubar] (dB), output signal is differential signal.
The ultrahigh frequency partial discharge sensor uses the type UHF sensor array of bandspreading.
The back side and side of the ultrahigh frequency partial discharge sensor are made using metal material.
The infrared temperature probe service band is 8~12 μm, and the infrared detector uses vanadium oxide crystal, is surveyed Warm ken MFOV is 1.
The infrared temperature probe uses thermopile infrared sensor TS118-1.
The shell of the on-line measuring device is made by aluminum alloy materials.
After adopting the above structure, ultrasound examination, three kinds of infrared measurement of temperature, Partial Discharge Detection hands are used in the present invention simultaneously Section, and real-time diagnosis is carried out using on-line measuring device comprehensive analysis processing, MDS type inside switch cabinet can be judged in time whether Appearance is generated heat or spark tracking, once there is accident sign, arranges related personnel to go to in-situ processing in time, manually examines compared to hand-held It surveys, accident judges more accurate, and status monitoring is more efficient.
Detailed description of the invention
Invention is further described in detail with reference to the accompanying drawings and detailed description:
Fig. 1 is the structural diagram of the present invention;
Fig. 2 is work flow diagram of the invention;
Fig. 3 is on-line measuring device flow chart of data processing figure.
Specific embodiment
As depicted in figs. 1 and 2, MDS type switchgear fault detection alarm device includes MDS type switchgear 1, MDS type switch The cable vault 2 positioned at lower part, superposed bus-bar room 3, relay instrument room 4, handcart room 5, peace in switchgear are equipped in cabinet Equipped with ultrasonic sensor 6, ultrahigh frequency partial discharge sensor 7, infrared temperature probe 8, each sensor in switchgear according to setting Standby difference is alternatively provided at suitable position, ultrasonic sensor, ultrahigh frequency partial discharge sensor, infrared temperature probe letter Number output end is electrically connected with on-Line Monitor Device respectively, and signal output end and the backstage warning system of on-line measuring device are electrically connected It connects.
Ultrasonic sensor includes rectangular piezoelectric chip planar array, sound absorption backing, acoustic matching layer, contact conductor, shell Deng.The array number of ultrasonic sensor is 7, and array element centre distance is 5mm, to guarantee sensor in length direction and width direction Consistency, the length and width of array element is equal.Ultrasonic sensor is close to setting, MDS type switchgear on the inside of MDS type switchgear It is made of steel plate, ultrasonic sensor passes through magnet fastening on MDS type switchgear, to guarantee sensor array and steel plate outer wall Between coupling it is good.
Shelf depreciation and generated acoustic emission signal have certain randomness, the acoustic signals frequency of each shelf depreciation Spectrum is different, but the frequency distribution range of entire partial discharge acoustic wave signal is little, is substantially at 20-110kHz frequency range, because The selection of ultrahigh frequency partial discharge sensor resonant frequency is in 30kHz, maximum width 20-180kHz, sensitivity in this present embodiment For 85 [- 75] V (m/s) [V/ubar] (dB), output signal is differential signal, strong antijamming capability.Ultrahigh frequency partial discharge sensor Using the type UHF sensor array of bandspreading, meet electric discharge diagnosis to accuracy, practicability and the requirement of safety.It is effective The electromagnetic wave signal that insulator leaks out is received, the ultrahigh frequency partial discharge sensor back side and side are made using metal material and are shielded It covers to inhibit extraneous interference.
Infrared temperature probe service band is 8~12 μm, and infrared detector uses vanadium oxide crystal, the thermometric ken MFOV is 1, and temperature is accurate to 1 pixel when measuring.The temperature stability of vanadium oxide infrared detector is good, the service life is long, temperature It drifts about small, measurement range is 0 ° -150 °;Temperature measurement accuracy is ± 1.8%;Response time 250ms.Infrared measurement of temperature passes in the present embodiment Sensor selects thermopile infrared sensor TS118-1.Thermopile infrared sensor TS118-1 detection object in a non-contact manner The infrared energy emitted, and corresponding voltage signal output is converted thereof into, STC12C5616AD single-chip microcontroller is used, The single-chip microcontroller not only has the characteristics that completely compatible traditional 8051 single-chip microcontroller of code, arithmetic speed are fast, but also there are also biggish The A/D conversion function of RAM, ROM Space and 10,8 tunnels.Therefore, it can reduce the complexity of design and saves component.
Ultrasonic sensor, ultrahigh frequency partial discharge sensor, infrared temperature probe are all made of in the present invention is passed based on dispersion Feel the Partial Discharge Detection localization method of array signal time delay, sensor is mounted on MDS type inside switch cabinet, comprehensive can examine The associated components such as contact, voltage transformer, bus and arrester in switchgear are surveyed, and data can be will test by cable with telecommunications Number be transferred to on-line measuring device, on-line measuring device by more physical quantity synchronous acquisitions, aggregation of data processing, analyze and determine, Health status is run according to the system parameter assessment equipment of setting, and the failures traces such as fever, electric discharge are uploaded to backstage in time Machine passes through backstage reporting fault signal.Specific data flowchart is shown in Fig. 3.
Ultrasonic sensor, ultrahigh frequency partial discharge sensor, infrared temperature probe are respectively equipped with signal conditioning unit.It is super High-frequency signal accesses ultrahigh speed Channels Synchronous Data Acquisition System (sample rate 100M/s), and ultrasonic signal and power frequency component access low speed Synchronous (sample rate highest 2.5M/s).The acquisition of ultra-high frequency signal is by detecting ultrahigh frequency pulses signal from touching Hair, while the trigger signal is transferred to multi-path low speed acquisition system, to realize ultrahigh speed acquisition system and low speed acquisition system Synchronous acquisition.
The shell of on-line measuring device is made by aluminum alloy materials, and high-frequency pulse signal is selected to be transferred to low speed acquisition system And signal conditioning circuit, signal analysis and processing is carried out using many algorithms.On-line measuring device is by feature extraction to improve office The accuracy of type identification is put, the characteristic parameter of selection includes impulse-equivalent time-frequency characteristics, pulse multi-dimension line frequency modulation feature, arteries and veins Characteristics of amplitude distribution, statistical nature etc. are rushed, and by various feature selection approach to reduce feature space dimension, improves mode and knows Other efficiency.Since the mechanism of various partial discharges is different, partial discharge source range sensor position is different, signal is coupled with route of transmission not Together, this system obtains the feature video parameter of Partial discharge signal by analytical calculation, and is clustered on this basis, by multi-source office Discharge signal and interference signal are separated.And fault alarm signal is uploaded to by backstage, O&M based on IEC61850 communication protocol The defects of personnel have found equipment discharge superheat in MDS type switchgear by backstage alarm signal in time is handled in time.
Ultrasound examination, three kinds of infrared measurement of temperature, Partial Discharge Detection means are used in the present invention simultaneously, and utilizes online inspection It surveys device comprehensive analysis processing and carries out real-time diagnosis, can judge whether MDS type inside switch cabinet occurs generating heat or discharging in time Trace arranges related personnel to go to in-situ processing in time once there is accident sign, compares hand-held artificial detection, and accident judges more Add precisely, status monitoring is more efficient.
In conclusion the present invention is not limited to above-mentioned specific embodiments.Those skilled in the art are not departing from skill of the present invention Under the premise of art scheme, several changes or modification can be done, above-mentioned change or modification each fall within protection scope of the present invention.

Claims (10)

1. a kind of MDS type switchgear fault detection alarm device, including MDS type switchgear, it is characterized in that the MDS type switchgear Ultrasonic sensor, ultrahigh frequency partial discharge sensor, infrared temperature probe, the ultrasonic sensor, hyperfrequency are inside installed Partial discharge sensor, infrared temperature probe signal output end be electrically connected respectively with on-Line Monitor Device, on-line checking dress The signal output end set is electrically connected with backstage warning system.
2. MDS type switchgear fault detection alarm device according to claim 1, it is characterized in that the supersonic sensing Device, ultrahigh frequency partial discharge sensor, infrared temperature probe are respectively equipped with signal conditioning unit.
3. MDS type switchgear fault detection alarm device according to claim 1, it is characterized in that the ultrasonic sensor Array number be 7, array element centre distance is 5mm, and the length and width of the array element is equal.
4. MDS type switchgear fault detection alarm device according to claim 1, it is characterized in that the ultrasonic sensor It is close to setting, the MDS type switchgear on the inside of MDS type switchgear to be made of steel plate, the ultrasonic sensor is tight by magnet Gu on MDS type switchgear.
5. MDS type switchgear fault detection alarm device according to claim 1, it is characterized in that the ultrahigh frequency partial discharge passes The resonance frequency of sensor is 20-180kHz, and sensitivity is 85 [- 75] V (m/s) [V/ubar] (dB), and output signal is difference letter Number.
6. MDS type switchgear fault detection alarm device according to claim 1, it is characterized in that the ultrahigh frequency partial discharge passes Sensor uses the type UHF sensor array of bandspreading.
7. MDS type switchgear fault detection alarm device according to claim 6, it is characterized in that the ultrahigh frequency partial discharge passes The back side and side of sensor are made using metal material.
8. MDS type switchgear fault detection alarm device according to claim 1, it is characterized in that the infrared measurement of temperature senses Device service band is 8~12 μm, and the infrared detector uses vanadium oxide crystal, and thermometric ken MFOV is 1.
9. MDS type switchgear fault detection alarm device according to claim 8, it is characterized in that the infrared measurement of temperature senses Device uses thermopile infrared sensor TS118-1.
10. MDS type switchgear fault detection alarm device according to any one of claim 1 to 9, it is characterized in that described The shell of on-line measuring device is made by aluminum alloy materials.
CN201811622702.8A 2018-12-28 2018-12-28 MDS type switchgear fault detection alarm device Pending CN109507556A (en)

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Application Number Priority Date Filing Date Title
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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
CN110174600A (en) * 2019-07-03 2019-08-27 云南电网有限责任公司电力科学研究院 GIS detection device and application based on μ PMT combining ultrasonic sensor
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
CN111507579A (en) * 2020-03-26 2020-08-07 国网四川省电力公司电力科学研究院 Clustering-method-based full-class voltage transformer operation performance evaluation method
CN112684293A (en) * 2020-12-25 2021-04-20 国网青海省电力公司 Power distribution system insulation fault diagnosis device
CN114113880A (en) * 2021-11-05 2022-03-01 国网青海省电力公司检修公司 Detection method for positioning local discharge fault of high-voltage switch cabinet

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CN108375933A (en) * 2018-03-05 2018-08-07 国网山东省电力公司高密市供电公司 Real-time monitoring's 10kV transformer overhauls management system
CN108919070A (en) * 2018-06-07 2018-11-30 广西电网有限责任公司电力科学研究院 A kind of partial discharge of switchgear detection system of Multi-source Information Fusion
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CN101702000A (en) * 2009-11-26 2010-05-05 华北电力大学(保定) Phased ultrasound locating method and system of partial discharge of transformer
CN103454564A (en) * 2013-08-22 2013-12-18 江苏科技大学 Partial discharge detecting system and method for high voltage switch cabinet
CN104808124A (en) * 2015-04-30 2015-07-29 国家电网公司 Acoustic-electric combined positioning method of switch cabinet local discharge fault positions
CN106841946A (en) * 2017-02-14 2017-06-13 吴笃贵 A kind of combined local discharge of electrical equipment live detection equipment
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN110174600A (en) * 2019-07-03 2019-08-27 云南电网有限责任公司电力科学研究院 GIS detection device and application based on μ PMT combining ultrasonic sensor
CN111507579A (en) * 2020-03-26 2020-08-07 国网四川省电力公司电力科学研究院 Clustering-method-based full-class voltage transformer operation performance evaluation method
CN112684293A (en) * 2020-12-25 2021-04-20 国网青海省电力公司 Power distribution system insulation fault diagnosis device
CN114113880A (en) * 2021-11-05 2022-03-01 国网青海省电力公司检修公司 Detection method for positioning local discharge fault of high-voltage switch cabinet

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