CN113049920A - Switch cabinet partial discharge and temperature online detection system and detection method thereof - Google Patents
Switch cabinet partial discharge and temperature online detection system and detection method thereof Download PDFInfo
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- CN113049920A CN113049920A CN201911257439.1A CN201911257439A CN113049920A CN 113049920 A CN113049920 A CN 113049920A CN 201911257439 A CN201911257439 A CN 201911257439A CN 113049920 A CN113049920 A CN 113049920A
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- 238000001514 detection method Methods 0.000 title claims abstract description 72
- 238000012545 processing Methods 0.000 claims abstract description 34
- 238000012423 maintenance Methods 0.000 claims abstract description 14
- 238000004458 analytical method Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 10
- 230000003321 amplification Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- 230000008439 repair process Effects 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 9
- 230000015556 catabolic process Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 4
- 238000006731 degradation reaction Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
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- 238000010891 electric arc Methods 0.000 description 1
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
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Abstract
The invention discloses a switch cabinet partial discharge and temperature online detection system and a detection method thereof, wherein the system comprises a partial discharge detection module, a temperature detection module, a data processing module, an alarm unit and a power supply module; the partial discharge detection module comprises a partial discharge sensor, a filter circuit and an amplifying circuit, the temperature detection module comprises a temperature sensor and an antenna sending device, the data processing module comprises an analysis host and an antenna receiving unit, and the alarm unit is a buzzer. The invention can realize real-time online detection of the insulation degradation trend and the temperature change trend of the switch cabinet, can determine the maintenance time and maintenance measures according to different early warning levels of the buzzer, can find the insulation defect of the switch cabinet in time, can quickly position the fault position of the switch cabinet, can effectively reduce the power failure time and the occurrence of accidents, and can ensure the safe and reliable operation of a power system.
Description
Technical Field
The invention relates to the technical field of partial discharge detection of a switch cabinet, in particular to a system and a method for detecting partial discharge and temperature of the switch cabinet on line.
Background
With the development of science and technology and the improvement of living standard of people, the electric load is continuously increased, so that the power switch cabinet can be in a high-load operation state for a long time.
Because the switch cabinet can generate bubbles or impurities in the manufacturing process, the high-voltage conductor spikes, metal particle groups, equipment manufacturing and mounting defects and the like in the switch cabinet can cause the nonuniformity of an electric field and a dielectric medium, and the partial discharge phenomenon can be easily found under the action of an alternating electric field. Generally, the partial discharge amount is very small, the insulation performance of the switch cabinet equipment cannot be influenced, but continuous discharge can generate a series of electric pulses to cause the temperature of a discharge medium to rise, further the dielectric performance of the insulation equipment is degraded, finally insulation breakdown, flashover and electric arc short circuit accidents are caused, the safety of personnel is threatened, and immeasurable economic loss and social influence are caused
The existing method for detecting the partial discharge of the switch cabinet generally adopts a manual intervention detection and maintenance method, and field maintainers are required to carry portable equipment to check whether unknown and uncertain faults exist, so that the method is poor in reliability and high in detection cost, and in addition, the partial discharge phenomenon is intermittent, the partial discharge change trend of the switch cabinet cannot be dynamically monitored, and the running state of the switch cabinet cannot be comprehensively analyzed.
Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a new system for detecting local discharge and temperature of a switch cabinet on-line and a detection method thereof.
Disclosure of Invention
In order to solve the technical problems, the invention provides a switch cabinet partial discharge and temperature online detection system and a detection method thereof
The invention provides a switch cabinet partial discharge and temperature online detection system and a detection method thereof, wherein the switch cabinet partial discharge and temperature online detection system comprises a partial discharge detection module, a temperature detection module, a data processing module, an alarm unit and a power supply module; the system comprises a temperature sensor, a data processing module, a local discharge detection module, an alarm unit and a control module, wherein the local discharge detection module comprises a local discharge sensor, a filter circuit and an amplifying circuit, the temperature detection module comprises a temperature sensor and an antenna sending device, the data processing module comprises an analysis host and an antenna receiving unit, and the alarm unit is a buzzer; the partial discharge detection module is installed on the inner wall of the switch cabinet, and the temperature detection module is installed on a disconnecting link and a contact in the switch cabinet.
The partial discharge detection module is used for continuously detecting and collecting partial discharge signals in the switch cabinet, performing simple clutter filtering and signal amplification processing on the detected partial discharge, and continuously transmitting the partial discharge signals to the data processing module through the coaxial cable;
the temperature detection module is used for continuously collecting temperature signals in the switch cabinet and transmitting temperature information to the data processing module through the antenna sending device;
the data processing module is used for receiving the partial discharge signal and the temperature information, comparing the received signal with a threshold value, and transmitting a comparison result to the background host through the DTU in a signal form;
the buzzer is used for giving out alarm buzzing sound;
the power module is used for providing electric energy for the whole detection system.
The further proposal is that the alarm of the buzzer is divided into general early warning, important early warning and major early warning;
the general early warning buzzer buzzes every 3 seconds;
the important early warning buzzer buzzes every 2 seconds;
the major early warning buzzer sends out continuous pre-buzzing sound.
Preferably, the detection method of the detection system comprises the following steps:
the method comprises the following steps: transmitting a partial discharge signal and temperature information to the data processing module through the partial discharge detection module and the temperature detection module;
step two: the data processing module compares the received partial discharge signal and the temperature information with a threshold value and transmits a comparison result to the background host through a DTU (delay tolerant unit) in a signal form;
step three: the background host sends the early warning level to the buzzer according to the information transmitted by the data processing module;
step four: and the maintenance worker inspects and repairs the switch cabinet according to the alarm level of the buzzer to enable the switch cabinet to be recovered to be normal.
More preferably, in the second step, the threshold value of the partial discharge information is 100pc, and the threshold value of the temperature information is 20-40 ℃.
Most preferably, when the local discharge signal and the temperature information are within the threshold value, the buzzer does not alarm; when the local discharge signal is 100-; when the local discharge signal is 500-; when the local discharge signal is more than 1000pc and the temperature information is more than 100 ℃, the buzzer sends out serious early warning; and the staff carries out the inspection and renovation of the switch cabinet according to the early warning degree.
Compared with the related art, the invention has the following beneficial effects: according to the invention, the temperature detection module arranged close to the disconnecting link contact is used for sending the disconnecting link temperature information obtained through continuous detection to the data processing module, and the partial discharge detection module arranged close to the inside of the power switch cabinet is used for sending the partial discharge information obtained through continuous detection to the data processing module, so that the insulation degradation trend and the temperature change trend of the switch cabinet can be detected on line in real time, the maintenance time and the maintenance measure can be determined according to different early warning levels of the buzzer, the insulation defect of the switch cabinet can be found in time, the fault position of the switch cabinet can be quickly positioned, the power failure time and the occurrence of accidents can be effectively reduced, and the safe and reliable operation of a power system can be ensured.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
FIG. 2 is a schematic diagram of the operation of the partial discharge detection module;
fig. 3 is a buzzer circuit diagram.
Detailed Description
The invention will be further explained with reference to the drawings and the embodiments.
As shown in fig. 1 and fig. 2, an embodiment of the present invention discloses an online detection system for partial discharge and temperature of a switch cabinet, which includes a partial discharge detection module, a temperature detection module, a data processing module, an alarm unit and a power supply module; the partial discharge detection module comprises a partial discharge sensor, a filter circuit and an amplification circuit, the temperature detection module comprises a temperature sensor and an antenna sending device, the data processing module comprises an analysis host and an antenna receiving unit, and the alarm unit is a buzzer; the partial discharge detection module is installed on the inner wall of the switch cabinet, and the temperature detection module is installed on a disconnecting link and a contact in the switch cabinet. The partial discharge detection module is used for continuously detecting and collecting partial discharge signals in the switch cabinet, performing simple clutter filtering and signal amplification processing on the detected partial discharge, and then continuously transmitting the partial discharge signals to the data processing module through the coaxial cable; the temperature detection module is used for continuously collecting temperature signals in the switch cabinet and transmitting temperature information to the data processing module through the antenna sending device; the data processing module is used for receiving the partial discharge signal and the temperature information, comparing the received signal with a threshold value, and transmitting a comparison result to the background host through the DTU in a signal form; the buzzer is used for giving out alarm buzzing sound; the power module is used for providing electric energy for the whole detection system.
As shown in fig. 3, the alarm of the buzzer is divided into general early warning, important early warning and major early warning; a general early warning buzzer buzzes every 3 seconds; the important early warning buzzer buzzes every 2 seconds; the major early warning buzzer sends out continuous pre-buzzing sound.
The invention can realize real-time online detection of the insulation degradation trend and the temperature change trend of the switch cabinet, can determine the maintenance time and maintenance measures according to different early warning levels of the buzzer, can find the insulation defect of the switch cabinet in time, can quickly position the fault position of the switch cabinet, can effectively reduce the power failure time and the occurrence of accidents, and can ensure the safe and reliable operation of a power system.
PREFERRED EMBODIMENTS
On the basis of embodiment 1, the embodiment discloses a local discharge and temperature online detection method for a switch cabinet, which specifically comprises the following steps:
the method comprises the following steps: transmitting a partial discharge signal and temperature information to the data processing module through the partial discharge detection module and the temperature detection module;
step two: the data processing module compares the received partial discharge signal and the temperature information with a threshold value and transmits a comparison result to the background host through a DTU (delay tolerant unit) in a signal form;
step three: the background host sends the early warning level to the buzzer according to the information transmitted by the data processing module;
step four: and the maintenance worker inspects and repairs the switch cabinet according to the alarm level of the buzzer to enable the switch cabinet to be recovered to be normal.
It is emphasized that, in the second step, the threshold value of the partial discharge information is 100pc, and the threshold value of the temperature information is 20-40 ℃. When the local discharge signal and the temperature information are within the threshold value, the buzzer does not give an alarm; when the local discharge signal is 100-; when the local discharge signal is 500-; when the local discharge signal is more than 1000pc and the temperature information is more than 100 ℃, the buzzer sends out serious early warning; and the staff determines the maintenance time and maintenance measures according to the early warning degree.
The method can monitor partial discharge and temperature signals of the switch cabinet on line in real time, reduce power failure and prevent accidents.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A switch cabinet partial discharge and temperature online detection system is characterized by comprising a partial discharge detection module, a temperature detection module, a data processing module, an alarm unit and a power supply module; the system comprises a temperature sensor, a data processing module, a local discharge detection module, an alarm unit and a control module, wherein the local discharge detection module comprises a local discharge sensor, a filter circuit and an amplifying circuit, the temperature detection module comprises a temperature sensor and an antenna sending device, the data processing module comprises an analysis host and an antenna receiving unit, and the alarm unit is a buzzer; the partial discharge detection module is installed on the inner wall of the switch cabinet, and the temperature detection module is installed on a disconnecting link contact in the switch cabinet.
2. The on-line detection system for partial discharge and temperature of switch cabinet according to claim 1, wherein the partial discharge detection module is used for continuously detecting and collecting partial discharge signals inside the switch cabinet, performing simple noise filtering and signal amplification processing on the detected partial discharge, and then continuously transmitting the partial discharge signals to the data processing module through the coaxial cable;
the temperature detection module is used for continuously collecting temperature signals in the switch cabinet and transmitting temperature information to the data processing module through the antenna sending device;
the data processing module is used for receiving the partial discharge signal and the temperature information, comparing the received signal with a threshold value, and transmitting a comparison result to the background host through the DTU in a signal form; the data processing module is coupled with the temperature detection module and the partial discharge detection module through a wireless network;
the buzzer is used for giving out alarm buzzing sound;
the power module is used for providing electric energy for the whole detection system.
3. The on-line detection system for partial discharge and temperature of switch cabinet according to claim 1, wherein the alarm of the buzzer is divided into general early warning, important early warning and major early warning;
the general early warning buzzer buzzes every 3 seconds;
the important early warning buzzer buzzes every 2 seconds;
the major early warning buzzer sends out continuous pre-buzzing sound.
4. A local discharge and temperature online detection method for a switch cabinet is characterized by comprising the following steps:
the method comprises the following steps: transmitting a partial discharge signal and temperature information to the data processing module through the partial discharge detection module and the temperature detection module;
step two: the data processing module compares the received partial discharge signal and the temperature information with a threshold value and transmits a comparison result to the background host through a DTU (delay tolerant unit) in a signal form;
step three: the background host sends the early warning level to the buzzer according to the information transmitted by the data processing module;
step four: and the maintenance worker inspects and repairs the switch cabinet according to the alarm level of the buzzer to enable the switch cabinet to be recovered to be normal.
5. The method for detecting the local discharge and the temperature of the switch cabinet according to claim 4, wherein in the second step, the local discharge information threshold is 100pc, and the temperature information threshold is 20-40 ℃.
6. The switchgear partial discharge and temperature on-line detection method according to any of claims 4-5, characterized in that when the partial discharge signal and the temperature information are within the threshold values, the buzzer does not alarm; when the local discharge signal is 100-; when the local discharge signal is 500-; when the local discharge signal is more than 1000pc and the temperature information is more than 100 ℃, the buzzer sends out serious early warning; and the staff determines the maintenance time and maintenance measures according to the early warning degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911257439.1A CN113049920A (en) | 2019-12-10 | 2019-12-10 | Switch cabinet partial discharge and temperature online detection system and detection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911257439.1A CN113049920A (en) | 2019-12-10 | 2019-12-10 | Switch cabinet partial discharge and temperature online detection system and detection method thereof |
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| CN113049920A true CN113049920A (en) | 2021-06-29 |
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| CN201911257439.1A Pending CN113049920A (en) | 2019-12-10 | 2019-12-10 | Switch cabinet partial discharge and temperature online detection system and detection method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113391202A (en) * | 2021-07-07 | 2021-09-14 | 国家电网有限公司 | Method for judging closing state of isolating switch |
| CN113985219A (en) * | 2021-09-24 | 2022-01-28 | 浙江华云电力工程设计咨询有限公司 | A kind of switch cabinet partial discharge and temperature joint monitoring system and monitoring method |
| CN114441914A (en) * | 2022-04-08 | 2022-05-06 | 山东中安电力科技有限公司 | Switch cabinet partial discharge detection system based on data processing |
-
2019
- 2019-12-10 CN CN201911257439.1A patent/CN113049920A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113391202A (en) * | 2021-07-07 | 2021-09-14 | 国家电网有限公司 | Method for judging closing state of isolating switch |
| CN113985219A (en) * | 2021-09-24 | 2022-01-28 | 浙江华云电力工程设计咨询有限公司 | A kind of switch cabinet partial discharge and temperature joint monitoring system and monitoring method |
| CN113985219B (en) * | 2021-09-24 | 2024-05-31 | 浙江华云电力工程设计咨询有限公司 | Combined monitoring system and monitoring method for partial discharge and temperature of switch cabinet |
| CN114441914A (en) * | 2022-04-08 | 2022-05-06 | 山东中安电力科技有限公司 | Switch cabinet partial discharge detection system based on data processing |
| CN114441914B (en) * | 2022-04-08 | 2022-06-14 | 山东中安电力科技有限公司 | Switch cabinet partial discharge detection system based on data processing |
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