CN108919066A - A kind of partial discharge of switchgear detection system and detection method - Google Patents
A kind of partial discharge of switchgear detection system and detection method Download PDFInfo
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- CN108919066A CN108919066A CN201810496152.3A CN201810496152A CN108919066A CN 108919066 A CN108919066 A CN 108919066A CN 201810496152 A CN201810496152 A CN 201810496152A CN 108919066 A CN108919066 A CN 108919066A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing 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
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Abstract
The invention discloses a kind of partial discharge of switchgear detection system and detection methods, are related to electric system detection technique field.The partial discharge of switchgear detection system and detection method, including ultrasonic sensor, radio wave sensor, multiple extra-high video sensors, multiple filter and amplification units, FPGA control high-speed a/d sampling unit, DSP integrated digital processing unit and storage unit, display unit, key-press input unit, communication interface and power frequency component input unit；By ultrasonic sensor, radio wave sensor and extra-high video sensor acquire respectively supersonic range, wave frequency ranges and super high band signal, realize the accurate detection to partial discharge of switchgear type, strength of discharge and spark location, the not high defect of accuracy in detection, effectively increases detection accuracy caused by avoiding because of the practicability and sensitive sex differernce of different electric discharge type energy delivery modes differences and different detection methods.
Description
Technical field
The invention belongs to electric system detection technique field more particularly to a kind of partial discharge of switchgear detection system and inspections
Survey method.
Background technique
Currently, 10KV, 35KV high-tension switch cabinet complete set of equipments of power distribution network have been widely used in electric system, are to match
Very important electrical equipment in power grid, reliability service are directly related to the reliability of power system power supply.
In switchgear insulation system, the electric field strength at each position is had differences, and the electric field strength in some region once reaches
When to its disruptive field intensity, the region will Discharge Phenomena, but apply between alive two conductors through entire
Discharge process discharges and does not puncture insulation system, this phenomenon is shelf depreciation.Shelf depreciation is minor insulation breakdown, such as
Fruit is allowed to constantly spread and develop, and will cause the damage of insulation, it will leads to connectivity breakdown of insulating, causes inside switch cabinet
Short circuit accident.Therefore, have great importance to the research and monitoring of high-tension switch cabinet shelf depreciation.
Switchgear generates more and more compacter at present, and insulation margin is smaller and smaller, high especially in the biggish south of air themperature
Compress switch cabinet internal unit if any electric discharge abnormal phenomenon, operation maintenance personnel during equipment-patrolling often be difficult discovery inside set
Therefore standby failure to high-voltage switch gear cabinet equipment other than carrying out periodic inspection, there is a need to carry out running switchgear
Partial Discharge Detection finds out electric discharge reason, to handle in time.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of partial discharge of switchgear detection system and detection method.
The present invention is to solve above-mentioned technical problem by the following technical solutions：A kind of partial discharge of switchgear detection
System, including ultrasonic sensor, radio wave sensor, multiple extra-high video sensors, multiple filter and amplification units, FPGA control
High-speed a/d sampling unit, DSP integrated digital processing unit and storage unit, display unit, key-press input unit, communication connect
Mouth and power frequency component input unit；
The ultrasonic sensor, radio wave sensor and multiple extra-high video sensors connect respectively with multiple filter and amplification units
It connects, the multiple filter and amplification unit is connect with FPGA control high-speed a/d sampling unit respectively；The DSP integrated digital processing
Unit respectively with FPGA control high-speed a/d sampling unit, storage unit, display unit, key-press input unit, communication interface and
The connection of power frequency component input unit；
The power frequency component input unit is also connect with signal transformer, and the signal transformer and 220V power frequency electric potential source connect
It connects；220V power-frequency voltage is 5V AC signal through signal transformer decompression processing, and 5V AC signal is through power frequency component input unit
After form positive square-wave signal, and be transmitted to DSP integrated digital processing unit, positive square-wave signal and FPGA control high-speed a/d sampling
AD sampled signal after cell processing is overlapped analysis, forms signal spectrogram related with phase.
By ultrasonic sensor, radio wave sensor and extra-high video sensor acquire respectively supersonic range, electric wave
The signal of frequency range and super high band realizes switchgear operating status complete detection and judgement.
Further, the frequency range of the ultrasonic sensor and its filter and amplification unit is 20k~40kHz.
Further, the frequency range of described ground radio wave sensor and its filter and amplification unit is 3M~100MHz.
Further, the frequency range of the extra-high video sensor is 300M~1000MHz.
Further, radio wave sensor band in described ground is electrically mounted on the shell of switch cabinet, structure and installation process
The field distribution inside switchgear is not influenced, can charge installation.
Further, the ultrasonic sensor is mounted on the shell of switch cabinet, and the extra-high video sensor passes through
Ultrahigh-frequency signal in the peep hole detection switch cabinet of switchgear.
Further, a kind of method for detection of partial discharge of switch cabinet, including following steps：
（1）The signal of switchgear supersonic range is acquired by ultrasonic sensor, the signal is after filter amplifying processing, transmission
Processing analysis is carried out to DSP integrated digital processing unit, is judged in switchgear with the presence or absence of ultrasonic wave local discharge signal, electric discharge
Type and strength of discharge；
（2）By ground radio wave sensor acquisition switchgear the signal of wave frequency ranges, the signal pass after filter amplifying processing
Send to DSP integrated digital processing unit, processing analysis carried out to the signal in conjunction with Partial discharge signal spectrogram library, judge be in switchgear
It is no to there is ground electric wave local discharge signal, electric discharge type and strength of discharge etc.；
（3）The signal of switchgear super high bands is acquired by multiple extra-high video sensors, the signal after filter amplifying processing,
It is sent to DSP integrated digital processing unit, processing analysis is carried out by Partial discharge signal spectrogram library, judges to whether there is in switchgear
Ultrahigh frequency partial discharge signal, electric discharge type and strength of discharge etc.；Simultaneously according to multiple extra-high video sensors acquisition signals when
Between it is poor, the conduction orientation of local discharge signal is judged, so that it is determined that the spark location of shelf depreciation；
（4）By display unit show DSP integrated digital processing unit judging result, the result include shelf depreciation type,
Strength of discharge and spark location；According to the relationship of electric discharge type, strength of discharge, point of discharge and operating frequency phase, judgement is obtained
The various shelf depreciation types such as pole plate, particle, suspension, surface pollution flashover.
Compared with prior art, partial discharge of switchgear detection system and detection method provided by the present invention, including it is super
Sonic sensor, radio wave sensor, multiple extra-high video sensors, multiple filter and amplification units, FPGA control high-speed a/d sampling
Unit, DSP integrated digital processing unit and storage unit, display unit, key-press input unit, communication interface and power frequency letter
Number input unit；By ultrasonic sensor, radio wave sensor and extra-high video sensor acquire respectively supersonic range, it is electric
The signal of wave frequency section and super high band realizes the standard to partial discharge of switchgear type, strength of discharge and spark location
Really detection is avoided because the practicability and sensitivity of the different and different detection methods of different electric discharge type energy delivery modes are poor
The not high defect of accuracy in detection caused by different, effectively increases detection accuracy；
Detection system and detection method of the invention improves the complete detection ability of partial discharge of switchgear, is convenient for operation maintenance personnel
The insulation fault of discovery in time and processing switchgear, reduces the failure rate of insulation of switchgear, guarantees the reliable and stable of electric system
Operation；
FPGA control high-speed a/d sampling unit of the invention be by high speed FPGA directly to the data throughput of AD sampling A/D chip into
Row control, takes full advantage of the high-speed and high-efficiency advantage of FPGA device, so that solving tradition uses CPU or single-chip data interface
Slow-footed problem realizes the requirement of high speed output storage.
Detailed description of the invention
It, below will be to attached drawing needed in embodiment description in order to illustrate more clearly of technical solution of the present invention
It is briefly described, it should be apparent that, the accompanying drawings in the following description is only one embodiment of the present of invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of partial discharge of switchgear detection system of the present invention；Fig. 2 is that switchgear of the present invention is locally put
The flow chart of electric detection method.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, the technical solution in the present invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, those of ordinary skill in the art's every other embodiment obtained without creative labor,
It shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of partial discharge of switchgear detection system provided by the present invention, including ultrasonic sensor,
Ground radio wave sensor, 2 extra-high video sensors, 4 filter and amplification units, FPGA control high-speed a/d sampling unit, DSP are comprehensive
Digital processing element and storage unit, display unit, key-press input unit, communication interface and power frequency component input unit；
Ultrasonic sensor, radio wave sensor and 2 extra-high video sensors connect respectively with 4 filter and amplification units, 4 filters
Wave amplifying unit is connect with FPGA control high-speed a/d sampling unit respectively；DSP integrated digital processing unit is controlled with FPGA respectively
High-speed a/d sampling unit, storage unit, display unit, key-press input unit, communication interface and power frequency component input unit connect
It connects；
Power frequency component input unit is also connect with signal transformer, and signal transformer is connect with 220V power frequency electric potential source；220V work
Frequency voltage is 5V AC signal through signal transformer decompression processing, and 5V AC signal forms pros after power frequency component input unit
Wave signal, and it is transmitted to DSP integrated digital processing unit, after positive square-wave signal and FPGA control high-speed a/d sampling unit processing
AD sampled signal be overlapped analysis, form signal spectrogram related with phase.
By ultrasonic sensor, radio wave sensor and extra-high video sensor acquire respectively supersonic range, electric wave
The signal of frequency range and super high band realizes switchgear operating status complete detection and judgement.
The frequency range of ultrasonic sensor and its filter and amplification unit is 20k~40kHz.
The frequency range of ground radio wave sensor and its filter and amplification unit is 3M~100MHz.
The frequency range of extra-high video sensor is 300M~1000MHz.
Ground radio wave sensor band is electrically mounted on the shell of switch cabinet, and structure and installation process do not influence switchgear
Internal field distribution, can charge installation.
Ultrasonic sensor is mounted on the shell of switch cabinet, and extra-high video sensor is detected by the peep hole of switchgear
Ultrahigh-frequency signal in switchgear.
As shown in Fig. 2, a kind of method for detection of partial discharge of switch cabinet, including following steps：
（1）The signal of switchgear supersonic range is acquired by ultrasonic sensor, the signal is after filter amplifying processing, transmission
Processing analysis is carried out to DSP integrated digital processing unit, is judged in switchgear with the presence or absence of ultrasonic wave local discharge signal, electric discharge
Type and strength of discharge；
（2）By ground radio wave sensor acquisition switchgear the signal of wave frequency ranges, the signal pass after filter amplifying processing
It send to DSP integrated digital processing unit, by carrying out processing analysis to the signal in conjunction with Partial discharge signal spectrogram library, judges switchgear
It is interior to whether there is ground electric wave local discharge signal, electric discharge type and strength of discharge etc.；
（3）The signal of switchgear super high band is acquired by 2 extra-high video sensors, the signal after filter amplifying processing,
It is sent to DSP integrated digital processing unit, processing analysis is carried out to the signal in conjunction with Partial discharge signal spectrogram library, is judged in switchgear
With the presence or absence of ultrahigh frequency partial discharge signal, electric discharge type and strength of discharge etc.；Simultaneously according to 2 extra-high video sensor acquisition letters
Number time difference, the conduction orientation of local discharge signal is judged, so that it is determined that the spark location of shelf depreciation；
（4）By display unit show DSP integrated digital processing unit judging result, the result include shelf depreciation type,
Strength of discharge and spark location；According to the relationship of electric discharge type, strength of discharge, point of discharge and operating frequency phase, judgement is obtained
The various shelf depreciation types such as pole plate, particle, suspension, surface pollution flashover.
Partial discharge of switchgear detection system and detection method provided by the present invention, by ultrasonic sensor, it is electric
Wave sensor and extra-high video sensor acquire respectively supersonic range, wave frequency ranges and super high band signal, realize pair
The accurate detection of partial discharge of switchgear type, strength of discharge and spark location is avoided because of different electric discharge type energy
The not high defect of accuracy in detection caused by the practicability and sensitive sex differernce of the different and different detection methods of delivery mode,
Effectively increase detection accuracy.
Traditional A/D sampling is usually to be controlled with CPU or single-chip microcontroller, has significant limitation, is generally only used for 10M/
SPS AD sampling below；And sample frequency is greater than 10M/SPS when being even up to 1G/SPS, must be directly controlled with high speed FPGA pair
The control that the data throughput of AD sampling A/D chip carries out, takes full advantage of the high-speed and high-efficiency advantage of FPGA device, to solve biography
The system problem slow using CPU or single-chip data interface rate, realizes the requirement of high speed output storage.
Above disclosed is only a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, can readily occur in variation or modification,
It is covered by the protection scope of the present invention.
Claims (7)
1. a kind of partial discharge of switchgear detection system, it is characterised in that：Including ultrasonic sensor, radio wave sensor, more
A extra-high video sensor, multiple filter and amplification units, FPGA control high-speed a/d sampling unit, DSP integrated digital processing unit with
And storage unit, display unit, key-press input unit, communication interface and power frequency component input unit；
The ultrasonic sensor, radio wave sensor and multiple extra-high video sensors connect respectively with multiple filter and amplification units
It connects, the multiple filter and amplification unit is connect with FPGA control high-speed a/d sampling unit respectively；The DSP integrated digital processing
Unit respectively with FPGA control high-speed a/d sampling unit, storage unit, display unit, key-press input unit, communication interface and
The connection of power frequency component input unit；
The power frequency component input unit is also connect with signal transformer, and the signal transformer and 220V power frequency electric potential source connect
It connects.
2. partial discharge of switchgear detection system as described in claim 1, it is characterised in that：The ultrasonic sensor and its
The frequency range of filter and amplification unit is 20k~40kHz.
3. partial discharge of switchgear detection system as described in claim 1, it is characterised in that：Described ground radio wave sensor and its
The frequency range of filter and amplification unit is 3M~100MHz.
4. partial discharge of switchgear detection system as described in claim 1, it is characterised in that：The frequency of the extra-high video sensor
Rate range is 300M~1000MHz.
5. partial discharge of switchgear detection system as claimed in claim 1 or 3, it is characterised in that：Described ground radio wave sensor
Band is electrically mounted on the shell of switch cabinet.
6. partial discharge of switchgear detection system as described in claim 1, it is characterised in that：The ultrasonic sensor installation
On switch cabinet shell, the extra-high video sensor passes through the ultrahigh-frequency signal in the peep hole detection switch cabinet of switchgear.
7. a kind of method for detection of partial discharge of switch cabinet, which is characterized in that including following steps：
（1）The signal of switchgear supersonic range is acquired by ultrasonic sensor, the signal is after filter amplifying processing, transmission
Processing analysis is carried out to DSP integrated digital processing unit, is judged in switchgear with the presence or absence of ultrasonic wave local discharge signal, electric discharge
Type and strength of discharge；
（2）By ground radio wave sensor acquisition switchgear the signal of wave frequency ranges, the signal pass after filter amplifying processing
Send to DSP integrated digital processing unit, processing analysis carried out to the signal in conjunction with Partial discharge signal spectrogram library, judge be in switchgear
It is no to there is ground electric wave local discharge signal, electric discharge type and strength of discharge；
（3）The signal of switchgear super high bands is acquired by multiple extra-high video sensors, the signal after filter amplifying processing,
It is sent to DSP integrated digital processing unit, processing analysis is carried out by Partial discharge signal spectrogram library, judges to whether there is in switchgear
Ultrahigh frequency partial discharge signal, electric discharge type and strength of discharge；Simultaneously according to the time of multiple extra-high video sensor acquisition signals
Difference judges the conduction orientation of local discharge signal, so that it is determined that the spark location of shelf depreciation；
（4）By display unit show DSP integrated digital processing unit judging result, the result include shelf depreciation type,
Strength of discharge and spark location；According to the relationship of electric discharge type, strength of discharge, point of discharge and operating frequency phase, judgement is obtained
Various shelf depreciation types.
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| CN109406972A (en) * | 2018-12-12 | 2019-03-01 | 云南电网有限责任公司电力科学研究院 | A kind of switchgear state of insulation combined monitoring method |
| CN109633391A (en) * | 2018-12-26 | 2019-04-16 | 国网江苏省电力有限公司 | A kind of portable multifunctional shelf depreciation on-line checking instrument for controller switching equipment |
| CN110261741A (en) * | 2019-05-24 | 2019-09-20 | 国网河北省电力有限公司电力科学研究院 | Discharge position localization method, device and the terminal device of high-tension switch gear |
| CN110824307A (en) * | 2019-11-07 | 2020-02-21 | 国网江苏省电力有限公司盐城供电分公司 | Electrified positioning system that detects of inside insulation fault of closed cubical switchboard |
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| CN111638431A (en) * | 2020-07-14 | 2020-09-08 | 国网山东省电力公司烟台供电公司 | Cubical switchboard partial discharge detection identification equipment based on ultrasonic detection method |
| CN112014691A (en) * | 2020-07-10 | 2020-12-01 | 国网安徽省电力有限公司电力科学研究院 | Multi-information fusion partial discharge detection terminal and method under power internet of things |
| CN112034309A (en) * | 2020-07-28 | 2020-12-04 | 北京交通大学 | Partial discharge identification method for high-voltage switch cabinet |
| CN112305382A (en) * | 2020-09-22 | 2021-02-02 | 云南电网有限责任公司昆明供电局 | Method for quickly identifying working state of internal equipment of high-voltage switch cabinet |
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| CN110824307A (en) * | 2019-11-07 | 2020-02-21 | 国网江苏省电力有限公司盐城供电分公司 | Electrified positioning system that detects of inside insulation fault of closed cubical switchboard |
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| CN112034309A (en) * | 2020-07-28 | 2020-12-04 | 北京交通大学 | Partial discharge identification method for high-voltage switch cabinet |
| CN112034309B (en) * | 2020-07-28 | 2021-11-23 | 北京交通大学 | Partial discharge identification method for high-voltage switch cabinet |
| CN112305382A (en) * | 2020-09-22 | 2021-02-02 | 云南电网有限责任公司昆明供电局 | Method for quickly identifying working state of internal equipment of high-voltage switch cabinet |
| CN112305382B (en) * | 2020-09-22 | 2023-05-30 | 云南电网有限责任公司昆明供电局 | Method for rapidly identifying working state of internal equipment of high-voltage switch cabinet |
| CN112557706A (en) * | 2020-11-27 | 2021-03-26 | 广西电网有限责任公司电力科学研究院 | Subassembly that switch box that awaits measuring was nimble to be inserted in distribution network real estate test platform |
| CN112557706B (en) * | 2020-11-27 | 2023-03-14 | 广西电网有限责任公司电力科学研究院 | Subassembly that switch box that awaits measuring was nimble to be inserted in distribution network real estate test platform |
| CN112485620A (en) * | 2020-12-08 | 2021-03-12 | 国网北京市电力公司 | Switch cabinet partial discharge comprehensive detection and evaluation method and system |
| CN112763867A (en) * | 2020-12-23 | 2021-05-07 | 深圳供电局有限公司 | GIS multifrequency section ultrasonic wave partial discharge sensor |
| CN113884846A (en) * | 2021-12-07 | 2022-01-04 | 山东理工大学 | Partial discharge and temperature rise online monitoring system for switch cabinet |
| CN113884846B (en) * | 2021-12-07 | 2022-02-15 | 山东理工大学 | Partial discharge and temperature rise online monitoring system for switch cabinet |
| CN117420505A (en) * | 2023-11-08 | 2024-01-19 | 中国水利水电科学研究院 | Intelligent detection positioning device for termite nest of dam |
| CN118191681A (en) * | 2024-03-21 | 2024-06-14 | 北京智盟信通科技有限公司 | Transformer defect identification method and system combining multidimensional data analysis |
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Application publication date: 20181130 |