CN112986696A - Fixed-point electromagnetic detection system for transformer substation - Google Patents
Fixed-point electromagnetic detection system for transformer substation Download PDFInfo
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- CN112986696A CN112986696A CN201911211121.XA CN201911211121A CN112986696A CN 112986696 A CN112986696 A CN 112986696A CN 201911211121 A CN201911211121 A CN 201911211121A CN 112986696 A CN112986696 A CN 112986696A
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- 238000001514 detection method Methods 0.000 title claims abstract description 90
- 238000004458 analytical method Methods 0.000 claims abstract description 13
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 230000005670 electromagnetic radiation Effects 0.000 claims abstract description 7
- 230000005684 electric field Effects 0.000 claims description 34
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 16
- 239000004800 polyvinyl chloride Substances 0.000 claims description 16
- 238000007405 data analysis Methods 0.000 claims description 15
- 239000013307 optical fiber Substances 0.000 claims description 12
- 230000002159 abnormal effect Effects 0.000 claims description 9
- 230000005855 radiation Effects 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 3
- 230000003993 interaction Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
- 230000002452 interceptive effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 208000028571 Occupational disease Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006806 disease prevention Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/08—Measuring electromagnetic field characteristics
- G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
- G01R29/0871—Complete apparatus or systems; circuits, e.g. receivers or amplifiers
Abstract
The application discloses a fixed-point electromagnetic detection system of a transformer substation, which comprises a fixed-point electromagnetic detection module, data acquisition equipment and a power supply control circuit; the fixed-point electromagnetic detection module detects the electromagnetic radiation and noise conditions in the transformer substation in a fixed-point mode and transmits detection data to the data acquisition equipment for storage; the data acquisition equipment uploads the data to an intelligent monitoring platform for the occupational harmful factors of the power grid for analysis or display through built-in network equipment; the power supply control circuit supplies power to the fixed-point electromagnetic detection system. The fixed mode that detects of this application can be long-time electromagnetic radiation and the noise condition in the continuous monitoring transformer substation, has solved the problem that the mode that artifical patrolling and examining can not monitor same position in succession.
Description
Technical Field
The invention belongs to the technical field of transformer substation occupational harmful factor detection, and relates to a transformer substation fixed-point electromagnetic detection system.
Background
Occupational harmful factors such as a power frequency electric field, a power frequency magnetic field, noise and the like can be generated in the operation process of a transformer substation and a circuit of the existing power grid, and the occupational harmful factors generated in the power grid need to be detected according to the requirements of health China, occupational disease prevention and control law and the like.
The prior detection technology is that detection equipment is used manually, a transformer substation and a power transmission line are set, manual detection is carried out, time and labor are wasted, and the method is embodied as follows: during manual testing, only data in partial time intervals can be detected, and 24h continuous detection cannot be performed; the detection data can be recorded only by hand and is sorted after the detection is finished; during detection, when a person is close to the equipment, interference can be generated on detection data; when external personnel enter the transformer substation for detection, the risk of threatening the safe operation of the transformer substation is possibly generated, and certain risk is generated to the personal safety of the entering external personnel due to more high-voltage equipment in the transformer substation.
Disclosure of Invention
In order to solve the defects in the prior art, the application provides a high-efficiency and safe substation occupational harmful factor fixed-point electromagnetic detection system.
In order to achieve the above object, the first invention of the present application adopts the following technical solutions:
a fixed point electromagnetic detection system of a transformer substation comprises a fixed point electromagnetic detection module, data acquisition equipment and a power supply control circuit;
the fixed-point electromagnetic detection module detects the electromagnetic radiation and noise conditions in the transformer substation in a fixed-point mode and transmits detection data to the data acquisition equipment for storage;
the data acquisition equipment uploads the data to an intelligent monitoring platform for the occupational harmful factors of the power grid for analysis or display through built-in network equipment;
the power supply control circuit supplies power to the fixed-point electromagnetic detection system.
The invention further comprises the following preferred embodiments:
preferably, the fixed-point electromagnetic detection module comprises a power frequency electric field intensity detection module, a power frequency magnetic field intensity detection module and a noise data detection module, and is respectively used for fixed-point detection of the power frequency electric field intensity, the power frequency magnetic field intensity and the noise data in the transformer substation;
the power frequency electric field intensity detection module is arranged below the high voltage outlet position, the power frequency magnetic field intensity detection module is arranged at a reactance or series reactance position, and the noise data detection module is arranged at a transformer position.
Preferably, the power frequency electric field strength detection module comprises a power frequency electric field sensor and a temperature and humidity module;
the power frequency electric field sensor is used for detecting the radiation intensity of a power frequency electric field, is internally provided with an antenna, an A/D converter and a processor, converts field intensity information into a digital signal with a fixed format and outputs the digital signal to data acquisition equipment through an optical fiber;
the temperature and humidity module is used for detecting the current temperature and humidity, outputting a digital signal and sending the digital signal to the data acquisition equipment through an RS-232 interface.
Preferably, the data acquisition device receives power frequency electric field intensity data and sensor electric quantity information sent by the power frequency electric field sensor through the optical fiber interface, controls the sensor to sleep and wake up, receives temperature and humidity information sent by the temperature and humidity module, uploads the field intensity data, the electric quantity information and the temperature and humidity information in an interactive mode with the network device, judges the working state of the power frequency electric field sensor and uploads alarm information under abnormal conditions.
Preferably, the power frequency magnetic field intensity detection module comprises a power frequency magnetic field sensor for detecting the radiation intensity of the power frequency magnetic field, and is internally provided with an induction coil, an a/D converter and a processor for converting the field intensity information into a digital signal with a fixed format and outputting the digital signal to the data acquisition equipment through an optical fiber.
Preferably, the data acquisition device receives power frequency magnetic field intensity data and sensor electric quantity information sent by the power frequency magnetic field sensor through the optical fiber interface, controls the sensor to sleep and wake up, interactively uploads the field intensity data and the electric quantity information with the network device, judges the working state of the power frequency magnetic field sensor and uploads alarm information under abnormal conditions.
Preferably, the noise data detection module comprises a noise sensor and a noise data analysis module;
the noise sensor receives the space noise, converts the space noise into an analog electric signal, and outputs the analog electric signal to the noise data analysis module through the coaxial shielded cable with BNC receiving;
and the noise data analysis module receives and analyzes the analog electric signal and sends an analysis result to the data acquisition equipment through the RS-485 interface, wherein the analysis result comprises sound level data, 1/1 octaves and 1/3 octave data.
Preferably, the data acquisition device communicates with the noise data analysis module through an RS-485 interface, acquires various noise data by sending different instructions, operates the analysis module to switch a test range according to a measured noise level, interactively uploads the noise data with the network device, judges a working state of the noise data analysis module, and uploads alarm information under an abnormal condition.
Preferably, the power supply control circuit collects the states of commercial power and solar power supply, selects which power supply to use for supplying power according to the states of the two power supplies, and simultaneously temporarily cuts off the other power supply to supply power for the data acquisition device and the sensor control circuit and charge a storage battery arranged in the power supply control circuit.
Preferably, the fixed point electromagnetic detection module is made of PVC (polyvinyl chloride), and is arranged at the top end of the PVC upright; the data acquisition equipment is arranged on the PVC upright post; and the power supply control circuit is arranged at the bottom of the PVC upright post.
The beneficial effect that this application reached:
1. the power supply design aspect of the application is as follows: as the basis of long-time continuous monitoring work of the system, solar energy and commercial power can be automatically switched, and normal work can be maintained under the condition of rain or power failure in cloudy days; under the most extreme condition, both solar energy and mains supply have problems, and the built-in high-capacity lithium battery can support the equipment to work for a plurality of days and can wait for operation and maintenance personnel to check and maintain and supplement power supplies;
2. this application is for avoiding the metallic object to electromagnetic radiation intensity measuring's influence, guarantees the validity of test result, and electromagnetic sensor data export adopts optic fibre, and the sensor support post material adopts PVC.
3. This application adopts the integral type design, and from gathering data processing and network transmission all accomplish in the system automatically, the electromagnetic radiation and the noise condition in the mode of this application fixed detection can long-time continuous monitoring transformer substation, has solved the problem that the mode that the manual work was patrolled and examined can not the continuous monitoring same position.
Drawings
FIG. 1 is a schematic structural diagram of a power frequency electric field strength detection module in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of a power frequency magnetic field strength detection module in an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a noise data detection module in an embodiment of the present application;
fig. 4 is a schematic diagram of an installation structure of a substation fixed-point electromagnetic detection system in an embodiment of the present application.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
The fixed-point electromagnetic detection system for the transformer substation comprises a fixed-point electromagnetic detection module, data acquisition equipment, an intelligent monitoring platform for occupational harmful factors of a power grid and a power supply control circuit;
the fixed-point electromagnetic detection module detects the electromagnetic radiation and noise conditions in the transformer substation in a fixed-point mode and transmits detection data to the data acquisition equipment for storage;
the data acquisition equipment uploads the data to an intelligent monitoring platform for the occupational harmful factors of the power grid for analysis or display through built-in network equipment;
the power supply control circuit supplies power to the fixed-point electromagnetic detection system.
As shown in fig. 1, in the embodiment, the power supply control circuit collects the states of the commercial power and the solar power, selects which power supply to use according to the states of the two power supplies, and temporarily cuts off the other power supply to supply power to the data collection device and the sensor control circuit (the sensor control circuit is arranged inside the sensor to control the working state of the sensor), so as to charge the storage battery built in the power supply control circuit.
The fixed point electromagnetic detection module is made of PVC (polyvinyl chloride), and is arranged at the top end of the PVC upright; the data acquisition equipment is arranged on the PVC upright post; and the power supply control circuit is arranged at the bottom of the PVC upright post.
In the embodiment, the fixed-point electromagnetic detection module comprises a power frequency electric field intensity detection module, a power frequency magnetic field intensity detection module and a noise data detection module, which are respectively used for fixed-point detection of the power frequency electric field intensity, the power frequency magnetic field intensity and the noise data in the transformer substation;
the power frequency electric field intensity detection module, the power frequency magnetic field intensity detection module and the noise data detection module are respectively arranged at the position, in the transformer substation, of the maximum power frequency electric field intensity (below the high voltage output line position), the maximum power frequency magnetic field intensity (at the reactance or series reactance position) and the maximum noise (at the transformer).
As shown in fig. 2, the power frequency electric field strength detection module includes a power frequency electric field sensor and a temperature and humidity module;
the power frequency electric field sensor is used for detecting the radiation intensity of a power frequency electric field, is internally provided with an antenna, an A/D converter and a processor, converts field intensity information into a digital signal with a fixed format and outputs the digital signal to data acquisition equipment through an optical fiber;
the temperature and humidity module is used for detecting the current temperature and humidity, outputting a digital signal and sending the digital signal to the data acquisition equipment through an RS-232 interface.
In the power frequency electric field intensity detection module, the data acquisition equipment receives power frequency electric field intensity data and sensor electric quantity information sent by a power frequency electric field sensor through an optical fiber interface, controls the sensor to sleep and wake up, receives humiture information sent by a humiture module, uploads the field intensity data, the electric quantity information and the humiture information in an interactive mode with network equipment, judges the working state of the power frequency electric field sensor and uploads alarm information under abnormal conditions.
As shown in fig. 3, the power frequency magnetic field strength detection module includes a power frequency magnetic field sensor for detecting the radiation strength of the power frequency magnetic field, and an induction coil, an a/D converter, and a processor are built in the power frequency magnetic field strength detection module, and convert the field strength information into a digital signal with a fixed format, and output the digital signal to the data acquisition device through an optical fiber.
In the power frequency magnetic field intensity detection module, the data acquisition equipment receives power frequency magnetic field intensity data and sensor electric quantity information sent by a power frequency magnetic field sensor through an optical fiber interface, controls the sensor to sleep and wake up, interactively uploads the field intensity data and the electric quantity information with network equipment, judges the working state of the power frequency magnetic field sensor and uploads alarm information under abnormal conditions.
As shown in fig. 4, the noise data detection module includes a noise sensor and a noise data analysis module;
the noise sensor receives the space noise, converts the space noise into an analog electric signal, and outputs the analog electric signal to the noise data analysis module through the coaxial shielded cable with BNC receiving;
and the noise data analysis module receives and analyzes the analog electric signal and sends an analysis result to the data acquisition equipment through the RS-485 interface, wherein the analysis result comprises sound level data, 1/1 octaves and 1/3 octave data.
In the noise data detection module, the data acquisition device is communicated with the noise data analysis module through an RS-485 interface, various noise data are acquired by sending different instructions, the analysis module is operated to switch the test range according to the level of the detected noise, the noise data are uploaded by the network device in an interactive mode, the working state of the noise data analysis module is judged, and alarm information is uploaded under abnormal conditions.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are merely preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for limiting the scope of the present invention, and on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the scope of the present invention.
Claims (10)
1. The fixed-point electromagnetic detection system for the transformer substation is characterized in that:
the fixed-point electromagnetic detection system comprises a fixed-point electromagnetic detection module, data acquisition equipment and a power supply control circuit;
the fixed-point electromagnetic detection module detects the electromagnetic radiation and noise conditions in the transformer substation in a fixed-point mode and transmits detection data to the data acquisition equipment for storage;
the data acquisition equipment uploads the data to an intelligent monitoring platform for the occupational harmful factors of the power grid for analysis or display through built-in network equipment;
the power supply control circuit supplies power to the fixed-point electromagnetic detection system.
2. A substation site-specific electromagnetic detection system according to claim 1, characterized in that:
the fixed-point electromagnetic detection module comprises a power frequency electric field intensity detection module, a power frequency magnetic field intensity detection module and a noise data detection module, and is respectively used for fixed-point detection of power frequency electric field intensity, power frequency magnetic field intensity and noise data in the transformer substation;
the power frequency electric field intensity detection module is arranged below the high voltage outlet position, the power frequency magnetic field intensity detection module is arranged at a reactance or series reactance position, and the noise data detection module is arranged at a transformer position.
3. A substation site-specific electromagnetic detection system according to claim 2, characterized in that:
the power frequency electric field intensity detection module comprises a power frequency electric field sensor and a temperature and humidity module;
the power frequency electric field sensor is used for detecting the radiation intensity of a power frequency electric field, is internally provided with an antenna, an A/D converter and a processor, converts field intensity information into a digital signal with a fixed format and outputs the digital signal to data acquisition equipment through an optical fiber;
the temperature and humidity module is used for detecting the current temperature and humidity, outputting a digital signal and sending the digital signal to the data acquisition equipment through an RS-232 interface.
4. A substation site-specific electromagnetic detection system according to claim 3, characterized in that:
the data acquisition equipment receives power frequency electric field intensity data and sensor electric quantity information sent by the power frequency electric field sensor through the optical fiber interface, controls the sensor to sleep and awaken, receives temperature and humidity information sent by the temperature and humidity module, uploads the field intensity data, the electric quantity information and the temperature and humidity information in an interaction mode with the network equipment, judges the working state of the power frequency electric field sensor and uploads alarm information under abnormal conditions.
5. A substation site-specific electromagnetic detection system according to claim 2, characterized in that:
the power frequency magnetic field intensity detection module comprises a power frequency magnetic field sensor for detecting the radiation intensity of the power frequency magnetic field, an induction coil, an A/D converter and a processor are arranged in the power frequency magnetic field intensity detection module, the field intensity information is converted into a digital signal with a fixed format, and the digital signal is output to data acquisition equipment through an optical fiber.
6. A substation site-specific electromagnetic detection system according to claim 5, characterized in that:
the data acquisition equipment receives power frequency magnetic field intensity data and sensor electric quantity information sent by the power frequency magnetic field sensor through the optical fiber interface, controls the sensor to sleep and wake up, interactively uploads the field intensity data and the electric quantity information with network equipment, judges the working state of the power frequency magnetic field sensor and uploads alarm information under abnormal conditions.
7. A substation site-specific electromagnetic detection system according to claim 2, characterized in that:
the noise data detection module comprises a noise sensor and a noise data analysis module;
the noise sensor receives the space noise, converts the space noise into an analog electric signal, and outputs the analog electric signal to the noise data analysis module through the coaxial shielded cable with BNC receiving;
and the noise data analysis module receives and analyzes the analog electric signal and sends an analysis result to the data acquisition equipment through the RS-485 interface, wherein the analysis result comprises sound level data, 1/1 octaves and 1/3 octave data.
8. A substation site electromagnetic detection system according to claim 7, characterized in that:
the data acquisition equipment is communicated with the noise data analysis module through an RS-485 interface, various noise data are acquired by sending different instructions, the analysis module is operated to switch a test range according to the tested noise level, the noise data are uploaded by interaction with the network equipment, the working state of the noise data analysis module is judged, and alarm information is uploaded under abnormal conditions.
9. A substation site electromagnetic detection system according to any one of claims 1 to 8, characterized in that:
the power supply control circuit collects the states of commercial power and solar power supply, selects which power supply to use according to the states of the two power supplies to supply power, and simultaneously temporarily cuts off the other power supply to supply power for the data acquisition equipment and the sensor control circuit and charge a storage battery arranged in the power supply control circuit.
10. A substation site electromagnetic detection system according to any one of claims 1 to 8, characterized in that:
the fixed point electromagnetic detection module is made of PVC (polyvinyl chloride), and is arranged at the top end of the PVC upright; the data acquisition equipment is arranged on the PVC upright post; and the power supply control circuit is arranged at the bottom of the PVC upright post.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115086372A (en) * | 2022-06-09 | 2022-09-20 | 苏州大学 | Industrial internet data acquisition method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060271312A1 (en) * | 2005-05-27 | 2006-11-30 | American Electric Power Company, Inc. | System and method for detecting impaired electric power equipment |
| CN104297574A (en) * | 2014-10-30 | 2015-01-21 | 北京森馥科技股份有限公司 | Substation power frequency electromagnetic environment monitoring system |
| CN106231881A (en) * | 2016-07-29 | 2016-12-14 | 国网河南省电力公司南阳供电公司 | A kind of transformer station's electrical control cabinet noise and electromagnetic radiation monitoring shielding harness |
| CN106840258A (en) * | 2017-01-23 | 2017-06-13 | 国网山东省电力公司电力科学研究院 | The full state electromagnetic environment monitoring system of wide area and method based on multi-parameter synergic monitoring |
| KR101992385B1 (en) * | 2019-04-24 | 2019-09-30 | 대흥기업 주식회사 | Diagnosis system of substation deterioration monitoring |
| CN112880732A (en) * | 2019-11-29 | 2021-06-01 | 国网山东省电力公司电力科学研究院 | Power grid occupational harmful factor monitoring system |
-
2019
- 2019-12-02 CN CN201911211121.XA patent/CN112986696A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060271312A1 (en) * | 2005-05-27 | 2006-11-30 | American Electric Power Company, Inc. | System and method for detecting impaired electric power equipment |
| CN104297574A (en) * | 2014-10-30 | 2015-01-21 | 北京森馥科技股份有限公司 | Substation power frequency electromagnetic environment monitoring system |
| CN106231881A (en) * | 2016-07-29 | 2016-12-14 | 国网河南省电力公司南阳供电公司 | A kind of transformer station's electrical control cabinet noise and electromagnetic radiation monitoring shielding harness |
| CN106840258A (en) * | 2017-01-23 | 2017-06-13 | 国网山东省电力公司电力科学研究院 | The full state electromagnetic environment monitoring system of wide area and method based on multi-parameter synergic monitoring |
| KR101992385B1 (en) * | 2019-04-24 | 2019-09-30 | 대흥기업 주식회사 | Diagnosis system of substation deterioration monitoring |
| CN112880732A (en) * | 2019-11-29 | 2021-06-01 | 国网山东省电力公司电力科学研究院 | Power grid occupational harmful factor monitoring system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115086372A (en) * | 2022-06-09 | 2022-09-20 | 苏州大学 | Industrial internet data acquisition method |
| CN115086372B (en) * | 2022-06-09 | 2024-02-09 | 苏州大学 | Industrial Internet data acquisition method |
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