CN109387754A - High-voltage switch cabinet insulator local discharge on-line monitoring device - Google Patents
High-voltage switch cabinet insulator local discharge on-line monitoring device Download PDFInfo
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- CN109387754A CN109387754A CN201811448719.6A CN201811448719A CN109387754A CN 109387754 A CN109387754 A CN 109387754A CN 201811448719 A CN201811448719 A CN 201811448719A CN 109387754 A CN109387754 A CN 109387754A
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- unit
- switch cabinet
- voltage switch
- monitoring device
- line monitoring
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Classifications
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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
- G01R31/1227—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 of components, parts or materials
- G01R31/1245—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 of components, parts or materials of line insulators or spacers, e.g. ceramic overhead line cap insulators; of insulators in HV bushings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
Abstract
The present invention provides a kind of high-voltage switch cabinet insulator local discharge on-line monitoring devices, including straight-through current transformer, signal conditioning unit, high-speed sampling unit, FPGA unit, microprocessor unit, display unit, environment temperature sensor unit, communications interface unit, temperature transducer unit, video monitor unit, power supply unit；The straight-through current transformer, signal conditioning unit, high-speed sampling unit and FPGA unit successively couple, the FPGA unit, display unit, environment temperature sensor unit, communications interface unit, temperature transducer unit and video monitor unit are respectively coupled to the microprocessor unit, and the power supply unit coupling FPGA unit and microprocessor unit are for powering.Monitoring device of the invention, comprehensive three kinds of monitoring data, it can be achieved that high-voltage switch cabinet insulator shelf depreciation effective monitoring.
Description
Technical field
The present invention relates to technical field of electricity, and in particular to high-voltage switch cabinet insulator partial discharge monitoring device.
Background technique
There are strict requirements in country to the insulation characterisitic of high voltage electric equipment, but due to by production technology or material
Expect the limitation of itself, the flaw of some such as impurity, spine, bubble gap etc. is constantly present inside insulator.High voltage shape
At strong electrical field can not be uniformly distributed inside this insulator, there are the partial electric-field intensity of flaw opposite to become strong, lead
This part is caused to be easy to happen the electric discharge phenomena for existing only in this part, referred to as shelf depreciation.Individually primary shelf depreciation
Insulator can not be punctured, but increasing with shelf depreciation number, insulation characterisitic decline lead to that office more frequently occurs
Portion's electric discharge, finally generates big destructive break-down, to cause all kinds of electric fault problems to insulator.Therefore whole for power grid
For body, one of major incentive of electric power system fault is exactly that shelf depreciation leads to obtain insulation of electrical installation deterioration or even damage.
Under the premise of this, the shelf depreciation of high-voltage switch cabinet insulator, which is monitored on-line, can be effectively predicted device insulation spy
Implementations, electric power accident occurs for defence in advance, carries out early warning to high voltage switch cabinet fault.
Summary of the invention
The present invention proposes a kind of high-voltage switch cabinet insulator local discharge on-line monitoring device thus, exhausted by comprehensive monitoring
Edge sublist is realized exhausted to high-tension switch cabinet in face of ground discharge current waveform and frequency spectrum, insulator surface temperature rise and surface burn traces
Effective monitoring of edge shelf depreciation.
To achieve the goals above, present invention employs following technical solutions:
A kind of high-voltage switch cabinet insulator local discharge on-line monitoring device, including straight-through current transformer, signal tune
Reason unit, high-speed sampling unit, FPGA unit, microprocessor unit, display unit, environment temperature sensor unit, communication connect
Mouth unit, temperature transducer unit, video monitor unit, power supply unit；
The straight-through current transformer, signal conditioning unit, high-speed sampling unit and FPGA unit successively couple, described
FPGA unit, display unit, environment temperature sensor unit, communications interface unit, temperature transducer unit and video monitor list
Member is respectively coupled to the microprocessor unit, and the power supply unit coupling FPGA unit and microprocessor unit are for powering；
The straight-through current transformer includes annular permalloy iron core, coil and non-closed magnetic circuit shielding case, described
Coil is uniformly wound on annular permalloy iron core, and the non-closed magnetic circuit shielding case surrounds the annular permalloy iron core
And coil；Lead passes through the straight-through current transformer to insulator to be detected over the ground.
Further, the temperature transducer unit is Non-contact Infrared Temperature Measurement sensor, for measuring insulation sublist
Face temperature rise.
Further, the difference of insulator surface temperature and environment temperature is taken when the temperature transducer unit measures, and is made
For the whether raised criterion of temperature rise.
Further, the video monitor unit is the short focus camera with infrared light filling, for capturing insulation sublist
The burn traces that face shelf depreciation generates.
Further, the environment temperature sensor unit is thermistor, for acquiring ambient temperature value.
Further, the display unit is touch screen, for showing discharge current waveform and spectrogram, temperature rise value, burning
Burn mark mark and calcination degree reduced value.
Further, the signal conditioning unit is followed using high speed amplifier, to improve its input impedance.
Further, the AD9226 chip that the high-speed sampling unit is 12.
Further, the FPGA unit uses EP4CE10E22C8N, for receiving the high-speed sampling unit output
Sampled data is simultaneously transferred to the microprocessor unit.
Further, the microprocessor unit uses STM32F407ZGT6 chip, for transferring to the FPGA unit
Sampled data be based on Hanning window function carry out time domain transformation, obtain shelf depreciation frequency spectrum.
Beneficial effects of the present invention are as follows:
By comprehensive monitoring high-voltage switch cabinet insulator surface, discharge current waveform and frequency spectrum and high-tension switch cabinet are exhausted over the ground
Edge surface temperature rise data obtain interior insulator bubble, crackle shelf depreciation information, and pass through monitoring high-tension switch cabinet insulation
Sublist face burn traces obtain exterior insulator dirt, crackle shelf depreciation information, to realize high-voltage switch cabinet insulator office
On-line Discharge monitoring in portion's keeps insulator arc-over monitoring more accurate, has ensured the safe operation of high-tension switch cabinet.
Detailed description of the invention
Fig. 1 is the monitoring device unit composition and connection relationship diagram of the embodiment of the present invention.
Specific embodiment
For a further understanding of the present invention, the preferred embodiment of the invention is described below with reference to embodiment, still
It should be appreciated that these descriptions are only further explanation the features and advantages of the present invention, rather than to the claims in the present invention
Limitation.
The embodiment of the invention provides a kind of high-voltage switch cabinet insulator local discharge on-line monitoring devices, as shown in Figure 1,
It is single including straight-through current transformer, signal conditioning unit, high-speed sampling unit, FPGA unit, microprocessor unit, display
Member, environment temperature sensor unit, communications interface unit, temperature transducer unit, video monitor unit, power supply unit.
Wherein, straight-through current transformer, signal conditioning unit, high-speed sampling unit and FPGA unit successively couple, institute
State FPGA unit, display unit, environment temperature sensor unit, communications interface unit, temperature transducer unit and video monitor
Unit is respectively coupled to the microprocessor unit, and the power supply unit coupling FPGA unit and microprocessor unit are for powering.
Specifically, straight-through current transformer includes annular permalloy iron core, coil and non-closed magnetic circuit shielding case, line
Circle is uniformly wound on annular permalloy iron core, and annular permalloy iron core and coil are enclosed in by non-closed magnetic circuit shielding case
The inside, it is non-closed form that magnetic circuit, which is short-circuited shielding case, in order to prevent.Lead passes through the punching to insulator to be detected over the ground
Current transformer, to measure electric current of the insulator over the ground in lead.Its measuring principle can be such that insulator surface leaks when being electric discharge
While electric current increases, also the waveform of leakage current can be made to be distorted, and generate high frequency spectrum, can made after acquired processing
For judgment basis of discharging.
Preferably, temperature transducer unit is Non-contact Infrared Temperature Measurement sensor, for measuring insulation
Sub- surface temperature rise.In order to eliminate influence of the environment temperature to measurement, when measurement, takes the difference of insulator surface temperature and environment temperature
Value, as the whether raised criterion of temperature rise.
Preferably, video monitor unit is the short focus camera with infrared light filling, for capturing insulation
Sublist face shelf depreciation generate burn traces, as judge insulator whether occur shelf depreciation occur foundation.
Preferably, environment temperature sensor unit is thermistor, for acquiring ambient temperature value.
Preferably, display unit is touch screen, for showing discharge current waveform and spectrogram, temperature rise
Value, burn traces and calcination degree reduced value.
Preferably, signal conditioning unit is followed using high speed amplifier, to improve its input impedance.
Preferably, the AD9226 chip that high-speed sampling unit is 12.
Preferably, FPGA unit uses EP4CE10E22C8N, defeated for receiving the high-speed sampling unit
Sampled data out is simultaneously transferred to the microprocessor unit.Meanwhile microprocessor unit uses STM32F407ZGT6 chip,
Sampled data for transferring to the FPGA unit is based on Hanning window function and carries out time domain transformation, obtains shelf depreciation frequency spectrum.
In the present embodiment, FPGA unit uses EP4CE10E22C8N, selects 50M to have source crystal oscillator to provide clock source, by interior
Portion's phaselocked loop can divide or frequency multiplication is at frequency actually required, and FPGA sampling rate is 50MSPS, a power frequency component period
Interior high-speed AD converter acquires 1,000,000 datas altogether.When carrying out Fast Fourier Transform (FFT), the points for converting input are more,
Obtained result is more accurate, but is restricted by embedded microprocessor process performance, and it is whole that a large amount of data processing will affect system
The fluency of running body, therefore a portion data can only be used to carry out FFT.Comprehensively consider processor performance and most terminates
Fruit, final choice respectively take 2048 points from its two sides balanced sampling on the basis of data peaks center, at intercept signal peak value
4096 sampled points carry out FFT transform.A part of a lot of signal data is intercepted since FFT transform is equivalent to, for office
Discharge this nonperiodic signal in portion, and the integral multiple of original signal is not achieved always, just will appear spectral leakage at this time for intercept signal
Problem, so that measurement result will generate error with actual result.In order to reduce influence caused by spectral leakage as far as possible, this
When need to carry out reasonable time domain transformation to 4096 data points of taking-up, that is, select suitable windowing function, this implementation
Example selection Hanning window function carries out time domain transformation, obtains shelf depreciation frequency spectrum.
Later, in conjunction with the monitoring of insulator surface temperature rise and surface burn traces, it can be realized and insulate to high-tension switch cabinet
Effective monitoring of sub- shelf depreciation.
The above description of the embodiment is only used to help understand the method for the present invention and its core ideas.It should be pointed out that pair
For those skilled in the art, without departing from the principle of the present invention, the present invention can also be carried out
Some improvements and modifications, these improvements and modifications also fall within the scope of protection of the claims of the present invention.
Claims (10)
1. a kind of high-voltage switch cabinet insulator local discharge on-line monitoring device, it is characterised in that: including centre path current mutual inductance
Device, signal conditioning unit, high-speed sampling unit, FPGA unit, microprocessor unit, display unit, environment temperature sensor list
Member, communications interface unit, temperature transducer unit, video monitor unit, power supply unit；
The straight-through current transformer, signal conditioning unit, high-speed sampling unit and FPGA unit successively couple, the FPGA
Unit, display unit, environment temperature sensor unit, communications interface unit, temperature transducer unit and video monitor unit point
The microprocessor unit is not coupled, and the power supply unit coupling FPGA unit and microprocessor unit are for powering；
The straight-through current transformer includes annular permalloy iron core, coil and non-closed magnetic circuit shielding case, the coil
It is uniformly wound on annular permalloy iron core, the non-closed magnetic circuit shielding case surrounds the annular permalloy iron core and line
Circle；Lead passes through the straight-through current transformer to insulator to be detected over the ground.
2. as described in claim a kind of high-voltage switch cabinet insulator local discharge on-line monitoring device, it is characterised in that: described
Temperature transducer unit is Non-contact Infrared Temperature Measurement sensor, for measuring insulator surface temperature rise.
3. as claimed in claim 2 kind of high-voltage switch cabinet insulator local discharge on-line monitoring device, it is characterised in that: described
Temperature transducer unit takes the difference of insulator surface temperature and environment temperature when measuring, as the whether raised criterion of temperature rise.
4. as described in claim a kind of high-voltage switch cabinet insulator local discharge on-line monitoring device, it is characterised in that: described
Video monitor unit is the short focus camera with infrared light filling, for capturing the calcination trace of insulator surface shelf depreciation generation
Mark.
5. as described in claim a kind of high-voltage switch cabinet insulator local discharge on-line monitoring device, it is characterised in that: described
Environment temperature sensor unit is thermistor, for acquiring ambient temperature value.
6. as described in claim a kind of high-voltage switch cabinet insulator local discharge on-line monitoring device, it is characterised in that: described
Display unit is touch screen, for showing discharge current waveform and spectrogram, temperature rise value, burn traces and the comparison of calcination degree
Value.
7. as claimed in any one of claims 1 to 6 kind of high-voltage switch cabinet insulator local discharge on-line monitoring device, feature
Be: the signal conditioning unit is followed using high speed amplifier, to improve its input impedance.
8. as claimed in claim 7 kind of high-voltage switch cabinet insulator local discharge on-line monitoring device, it is characterised in that: described
The AD9226 chip that high-speed sampling unit is 12.
9. as claimed in claim 8 kind of high-voltage switch cabinet insulator local discharge on-line monitoring device, it is characterised in that: described
FPGA unit uses EP4CE10E22C8N, for receiving the sampled data of the high-speed sampling unit output and being transferred to described
Microprocessor unit.
10. as claimed in claim 9 kind of high-voltage switch cabinet insulator local discharge on-line monitoring device, it is characterised in that: institute
Microprocessor unit is stated using STM32F407ZGT6 chip, it is peaceful that the sampled data for transferring to the FPGA unit is based on the Chinese
Window function carries out time domain transformation, obtains shelf depreciation frequency spectrum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811448719.6A CN109387754A (en) | 2018-11-28 | 2018-11-28 | High-voltage switch cabinet insulator local discharge on-line monitoring device |
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| CN201811448719.6A CN109387754A (en) | 2018-11-28 | 2018-11-28 | High-voltage switch cabinet insulator local discharge on-line monitoring device |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634679A (en) * | 2009-07-14 | 2010-01-27 | 国网电力科学研究院武汉南瑞有限责任公司 | Intelligent insulator online monitoring method and system |
| KR101457876B1 (en) * | 2014-05-15 | 2014-11-04 | (주)지디일렉스 | A deterioration monitoring system for a distributing board on based hybrid temperature sensors with mater and slave device |
| CN105301432A (en) * | 2015-11-26 | 2016-02-03 | 国网山东省电力公司济南供电公司 | Electric power equipment insulation leakage current on-line monitoring circuit |
| CN105372540A (en) * | 2015-12-21 | 2016-03-02 | 河海大学常州校区 | Performance on-line monitoring device for power distribution switch cabinet lightning arrester and monitoring method thereof |
| CN106646062A (en) * | 2017-01-05 | 2017-05-10 | 国网福建省电力有限公司泉州供电公司 | Combined lightning arrester performance detection device |
| CN107271862A (en) * | 2017-06-15 | 2017-10-20 | 国网河南省电力公司济源供电公司 | A kind of high-tension switch cabinet partial discharge monitoring device |
| US20180120380A1 (en) * | 2015-04-01 | 2018-05-03 | High Voltage Partial Discharge Limited | Condition monitoring method and apparatus for high-voltage ac electrical systems |
| CN108732478A (en) * | 2018-09-10 | 2018-11-02 | 清华四川能源互联网研究院 | Partial discharge of switchgear on-line monitoring system based on superfrequency punching current sensor and method |
| CN209496103U (en) * | 2018-11-28 | 2019-10-15 | 杭州电力设备制造有限公司 | High-voltage switch cabinet insulator local discharge on-line monitoring device |
-
2018
- 2018-11-28 CN CN201811448719.6A patent/CN109387754A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634679A (en) * | 2009-07-14 | 2010-01-27 | 国网电力科学研究院武汉南瑞有限责任公司 | Intelligent insulator online monitoring method and system |
| KR101457876B1 (en) * | 2014-05-15 | 2014-11-04 | (주)지디일렉스 | A deterioration monitoring system for a distributing board on based hybrid temperature sensors with mater and slave device |
| US20180120380A1 (en) * | 2015-04-01 | 2018-05-03 | High Voltage Partial Discharge Limited | Condition monitoring method and apparatus for high-voltage ac electrical systems |
| CN105301432A (en) * | 2015-11-26 | 2016-02-03 | 国网山东省电力公司济南供电公司 | Electric power equipment insulation leakage current on-line monitoring circuit |
| CN105372540A (en) * | 2015-12-21 | 2016-03-02 | 河海大学常州校区 | Performance on-line monitoring device for power distribution switch cabinet lightning arrester and monitoring method thereof |
| CN106646062A (en) * | 2017-01-05 | 2017-05-10 | 国网福建省电力有限公司泉州供电公司 | Combined lightning arrester performance detection device |
| CN107271862A (en) * | 2017-06-15 | 2017-10-20 | 国网河南省电力公司济源供电公司 | A kind of high-tension switch cabinet partial discharge monitoring device |
| CN108732478A (en) * | 2018-09-10 | 2018-11-02 | 清华四川能源互联网研究院 | Partial discharge of switchgear on-line monitoring system based on superfrequency punching current sensor and method |
| CN209496103U (en) * | 2018-11-28 | 2019-10-15 | 杭州电力设备制造有限公司 | High-voltage switch cabinet insulator local discharge on-line monitoring device |
Non-Patent Citations (1)
| Title |
|---|
| 张金波 等: "基于脉冲电流法的高压开关柜局部放电在线监测装置的设计", 《自动化技术与应用》, vol. 37, no. 4, pages 3 * |
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