CN213242108U - Monitoring integration arrester - Google Patents
Monitoring integration arrester Download PDFInfo
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- CN213242108U CN213242108U CN202022488995.4U CN202022488995U CN213242108U CN 213242108 U CN213242108 U CN 213242108U CN 202022488995 U CN202022488995 U CN 202022488995U CN 213242108 U CN213242108 U CN 213242108U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 73
- 230000010354 integration Effects 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 230000005611 electricity Effects 0.000 claims abstract description 5
- 239000003822 epoxy resin Substances 0.000 claims description 32
- 229920000647 polyepoxide Polymers 0.000 claims description 32
- 230000002457 bidirectional effect Effects 0.000 claims description 20
- 230000005540 biological transmission Effects 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 11
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 12
- 238000001514 detection method Methods 0.000 abstract description 9
- 238000012360 testing method Methods 0.000 abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 3
- 230000007547 defect Effects 0.000 description 11
- 230000008901 benefit Effects 0.000 description 6
- 238000009422 external insulation Methods 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a monitoring integration arrester, include the arrester overcoat and set up the arrester resistance card in it, still include pressure sensor, sealing performance monitoring module, pressure sensor set up in the arrester overcoat with between the arrester resistance card, just pressure sensor with sealing performance monitoring module electricity is connected. The method can accurately monitor key state quantities such as the internal sealing performance, the resistive current, the phase angle and the like of the lightning arrester, reflect the running state of the lightning arrester in real time, and has great significance for preventing the lightning arrester from further expanding and developing faults, correctly guiding the maintenance work of the lightning arrester and ensuring the safety of a power grid; and can replace arrester power failure test and live detection, practiced thrift a large amount of manpower and materials.
Description
Technical Field
The utility model relates to a power equipment field especially relates to a monitoring integration arrester.
Background
The lightning arrester can release the energy of thunder and lightning or over-voltage operation, protect the electrical equipment from being damaged by instantaneous over-voltage, and can cut off follow current, so that the fault of short circuit of the system grounding cannot be caused. When the overvoltage value reaches the specified action voltage, the lightning arrester immediately acts, charges flow through, the overvoltage amplitude is limited, and the insulation of equipment is protected from breakdown damage; after the voltage value is normal, the lightning arrester is rapidly restored to the original state so as to ensure normal power supply of the system. The operational reliability of the lightning arrester plays a very important role in ensuring the safe operation of the power system, so that the detection of the operational state of the lightning arrester is very important. The method for detecting the running state of the arrester mainly comprises a power failure test, a live detection and a full current online monitoring, wherein the power failure test can well find the defects of the arrester, but the power failure test wastes time and labor and affects the electricity consumption of residents; the live detection method mainly comprises infrared temperature measurement and resistive current detection, the defect of the lightning arrester belongs to the defect of voltage heating performance, the temperature change is not large and generally does not exceed 1-2K, and the infrared temperature measurement finds that professionals with rich experience are often needed; the resistive current live detection method has the advantages that the measurement result is easily influenced by factors such as environment temperature and humidity, electromagnetic interference, external insulation dirt and the like; the full current on-line monitoring method has low sensitivity to the defects of the lightning arrester, and can display larger difference only when the defects of the lightning arrester are serious. Therefore, at present, a lightning arrester defect detection method which can ensure accurate and convenient measurement results does not exist.
SUMMERY OF THE UTILITY MODEL
In view of prior art's weak point, the utility model aims to provide a monitoring integration arrester to realize real-time supervision arrester running state, prevent that the arrester trouble from further expanding and developing, so that correctly guide its maintenance work, prevent the electric wire netting accident.
The utility model provides a monitoring integration arrester, includes the arrester overcoat and sets up the arrester resistance card in it, still includes pressure sensor, sealing performance monitoring module, pressure sensor set up in the arrester overcoat with between the arrester resistance card, just pressure sensor with sealing performance monitoring module electricity is connected.
The scheme provides a real-time monitoring method for the sealing performance of the lightning arrester for the first time, more than 85% of defects of the lightning arrester are that the interior of the lightning arrester is subjected to damp discharge due to poor sealing, micro-positive pressure is normally applied to the interior of the lightning arrester, a pressure sensor is used for monitoring the internal pressure, and if the internal pressure is kept equal to the atmospheric pressure, the internal sealing performance of the lightning arrester is invalid. Can accurate and real-time supervision arrester inside sealing performance through set up pressure sensor in the arrester overcoat, prevent that the arrester trouble from further expanding and developing to correctly guiding its maintenance work, the prevention electric wire netting accident need not carry out the power failure test, and convenient and fast can not influence resident's power consumption.
The lightning arrester further comprises a leakage current sensor and a current monitoring module, wherein the leakage current sensor is arranged in the lightning arrester outer sleeve and is positioned at the bottom end of the lightning arrester resistance card, and the leakage current sensor is electrically connected with the current monitoring module; the current monitoring module is also used for accessing a voltage reference signal and displaying real-time resistive current; the voltage reference signal is a voltage signal of a secondary winding of a voltage transformer which is in phase with the monitoring integrated lightning arrester, and the resistive current is obtained based on the voltage signal of the secondary winding of the voltage transformer which is in phase and a full current signal transmitted by a leakage current sensor.
The lightning arrester leakage current monitoring and lightning arrester integrated design is firstly realized, the leakage current sensor is arranged at the inner bottom end of the lightning arrester, the leakage current flowing through the lightning arrester resistance card is directly monitored, the influence of factors such as environment temperature and humidity, electromagnetic interference and external insulation dirt is successfully solved, and the accuracy of a measuring result is high.
Further, the current monitoring module is also used for obtaining and displaying a real-time phase angle based on the voltage reference signal and a full current signal transmitted by the leakage current sensor.
Further, the current monitoring module is also used for displaying real-time full current according to the full current signal transmitted by the leakage current sensor.
Further, the leakage current sensor is a Roves coil.
The pressure sensor is connected with the epoxy resin plate with the bidirectional plug head, and the epoxy resin plate with the bidirectional plug head is connected with the sealing performance monitoring module through pressure transmission lines; the leakage current sensor is connected with the epoxy resin plate with the bidirectional plug head and the epoxy resin plate with the bidirectional plug head is connected with the current monitoring module through current transmission lines. The epoxy resin plate with the bidirectional plug head ensures the sealing performance of the lightning arrester while ensuring that the pressure signal and the current signal are transmitted to the outside of the lightning arrester casing.
Furthermore, the epoxy resin plate with the bidirectional plug head comprises an epoxy resin plate and a metal connecting sheet, wherein the metal connecting sheet is embedded in the epoxy resin plate, two jacks communicated with the metal connecting sheet are respectively arranged on two sides of the epoxy resin plate, and the jacks arranged on two sides of the epoxy resin plate are staggered with each other. The jack sets up in crisscross each other, can avoid the jack of both sides to switch on, leads to the leakproofness of unable assurance arrester.
Further, the pressure transmission line and the current transmission line are both double-shielded lines.
Further, still include the count table that discharges, the input of count table that discharges with set up the flange joint of arrester overcoat one end, the output ground connection of count table that discharges, the count table that discharges is used for the record and shows the number of times that discharges of this monitoring integration arrester.
Furthermore, the collection range of the pressure sensor is 0.1-0.2 Mpa, and the collection range of the leakage current sensor is 0-5 mA.
Compared with the prior art, the utility model provides a monitoring integration lightning arrester has following advantage:
(1) the method for monitoring the sealing performance of the lightning arrester in real time is put forward for the first time, more than 85% of defects of the lightning arrester are that the interior of the lightning arrester is subjected to damp discharge due to poor sealing, the interior of the lightning arrester is micro-positive pressure under normal conditions, a pressure sensor is adopted to monitor the internal pressure, and if the internal pressure is equal to the atmospheric pressure, the internal sealing performance of the lightning arrester is invalid; the inner sealing performance of the arrester can be accurately monitored in real time by arranging the pressure sensor in the arrester casing.
(2) The lightning arrester leakage current monitoring and lightning arrester integrated design is firstly realized, the leakage current sensor is arranged at the inner bottom end of the lightning arrester, the leakage current flowing through the lightning arrester resistance card is directly monitored, the influence of factors such as environment temperature and humidity, electromagnetic interference and external insulation dirt is successfully solved, and the accuracy of a measuring result is high.
(3) The method has the advantages that key state quantities such as the internal sealing performance, the resistive current and the phase angle of the lightning arrester are accurately monitored in real time, the running state of the lightning arrester is reflected in real time, and the method has great significance for preventing the lightning arrester from further expanding and developing, correctly guiding the maintenance work of the lightning arrester and ensuring the safety of a power grid.
(4) Adopt the utility model provides a monitoring integration arrester can replace arrester power failure test and live line detection, has practiced thrift a large amount of manpower and materials.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an integrated lightning arrester for monitoring according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of an epoxy board with a bidirectional plug head according to an embodiment of the present invention.
In the figure, 1-arrester resistance card, 2-arrester jacket, 3-leakage current sensor, 4-pressure sensor, 5-epoxy resin plate with bidirectional plug head, 6-current transmission line, 7-pressure transmission line, 8-sealing performance monitoring module, 9-current monitoring module, 10-discharge counting meter, 11-voltage reference signal, 12-epoxy resin plate, 13-jack, 14-metal connecting sheet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "center", "longitudinal", "lateral", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
As shown in fig. 1 and 2, the embodiment of the utility model provides a monitoring integration arrester, include arrester overcoat 2 and set up arrester resistance card 1 in it, still include pressure sensor 4, sealing performance monitoring module 8, pressure sensor 4 set up in arrester overcoat 2 with between the arrester resistance card 1, just pressure sensor 4 with sealing performance monitoring module 8 electricity is connected, sealing performance monitoring module 8 is used for showing the inside pressure state of arrester overcoat 2.
The scheme of the embodiment provides a real-time monitoring method for the sealing performance of the lightning arrester for the first time, the defect that more than 85% of the lightning arrester has the defect that the interior of the lightning arrester is subjected to damp discharge due to poor sealing, micro-positive pressure is normally inside the lightning arrester, the pressure sensor 4 is used for monitoring the internal pressure, and if the internal pressure is equal to the atmospheric pressure, the internal sealing performance of the lightning arrester is invalid. Can accurate and real-time supervision arrester inside sealing performance through set up pressure sensor 4 in arrester overcoat 2, prevent that the arrester trouble from further expanding and developing to correctly guide its maintenance work, the prevention electric wire netting accident need not carry out the power failure test, and convenient and fast can not influence the resident power consumption.
In this embodiment, the lightning arrester further comprises a leakage current sensor 3 and a current monitoring module 9, wherein the leakage current sensor 3 is arranged in the lightning arrester outer sleeve 2 and is located at the bottom end of the lightning arrester resistor disc 1, and the leakage current sensor 3 is electrically connected with the current monitoring module 9; the current monitoring module 9 is further configured to access a voltage reference signal 11, and display a real-time resistive current and a phase angle; the voltage reference signal 11 is a voltage signal of a secondary winding of a voltage transformer which is in phase with the monitoring integrated lightning arrester; the leakage current sensor 3 is a Rofski coil. The lightning arrester leakage current monitoring and lightning arrester integrated design is firstly realized, the leakage current sensor 3 is arranged at the inner bottom end of the lightning arrester, the leakage current flowing through the lightning arrester resistance card 1 is directly monitored, the influence of factors such as environment temperature and humidity, electromagnetic interference and external insulation dirt is successfully solved, and the accuracy of a measuring result is high. The method for obtaining the resistive current and the phase angle based on the voltage signal of the secondary winding of the voltage transformer with the same phase and the full current signal transmitted by the leakage current sensor 3 is a known calculation method, and specifically comprises the following steps: after receiving the full current signal transmitted by the leakage current sensor 3 and the voltage signal of the secondary winding of the voltage transformer in the same phase, the current monitoring module 9 obtains a full current fundamental wave signal and a voltage fundamental wave signal by FFT (fast fourier transform) calculation and extraction, the phase difference between the voltage and the full current fundamental wave signal is a phase angle signal, and a phase angle can be obtained, and the cosine value obtained by multiplying the full current fundamental wave signal by the phase angle is a resistive current.
Optionally, the current monitoring module 9 is further configured to display a real-time full current according to the full current signal transmitted by the leakage current sensor 3.
In specific implementation, the lightning arrester further comprises an epoxy resin plate 5 with a bidirectional plug head, which is arranged on the lightning arrester housing 2, and the pressure sensor 4 is connected with the epoxy resin plate 5 with the bidirectional plug head and the sealing performance monitoring module 8 through pressure transmission lines 7; the leakage current sensor 3 is connected with the epoxy resin plate 5 with the bidirectional plug head and the epoxy resin plate 5 with the bidirectional plug head is connected with the current monitoring module 9 through current transmission lines 6. The epoxy resin plate 5 with the bidirectional plug head ensures the sealing performance of the arrester while ensuring the transmission of the pressure signal and the current signal to the outside of the arrester housing 2.
Specifically, as shown in fig. 2, the epoxy resin plate 5 with the bidirectional plug head includes an epoxy resin plate 12 and a metal connecting sheet 14, the metal connecting sheet 14 is embedded in the epoxy resin plate 12, two insertion holes 13 communicating with the metal connecting sheet 14 are respectively formed in two sides of the epoxy resin plate 12, and the insertion holes 13 formed in two sides of the epoxy resin plate 12 are staggered with each other. The jacks 13 are arranged in a staggered mode, so that the jacks 13 on two sides can be prevented from being communicated, and the sealing performance of the lightning arrester cannot be guaranteed.
Optionally, still include the count table 10 that discharges, the input of count table 10 that discharges with set up the flange joint of 2 one ends of arrester overcoat, the output ground connection of count table 10 that discharges, count table 10 that discharges is used for the record and shows the number of times that discharges (action) of this monitoring integration arrester, and the display range is 1 ~ 100 times in this embodiment.
In this embodiment, the pressure transmission line 7 and the current transmission line 6 are both double-shielded lines; the acquisition range of the pressure sensor 4 is 0.1-0.2 Mpa, and the precision is 0.002 Mpa; the collection range of the leakage current sensor 3 is 0-5 mA, and the precision is 0.01 mA. The sealing performance monitoring module 8 displays the pressure intensity inside the lightning arrester, acquired by the pressure sensor 4 and transmitted, and the display range is 0.1-0.2 Mpa. The resistive current display range of the current monitoring module 9 is 10-1000 muA, the phase angle display range is 45-90 degrees, and the full current display range is 10-3000 muA. Note that, the arrester resistor disc 1: the metal oxide resistance card with nonlinear volt-ampere characteristics, which is composed of a porcelain body, two end-face metal electrodes and a side insulation layer, presents high resistance under normal power frequency voltage and presents low resistance when bearing overvoltage, thereby limiting overvoltage between terminals of the lightning arrester; the lightning arrester outer sleeve 2: an outer insulating member for a lightning arrester for providing a creepage distance, mechanical strength and protecting the inner member from the environment.
The monitoring integration lightning arrester that above-mentioned embodiment provided has following advantage:
(1) firstly, a real-time monitoring method for the sealing performance of the lightning arrester is provided, wherein more than 85% of defects of the lightning arrester are that the interior of the lightning arrester is subjected to damp discharge due to poor sealing, the interior of the lightning arrester is subjected to micro positive pressure of 0.13-0.15 Mpa under normal conditions, a pressure sensor is adopted to monitor the internal pressure, and if the internal pressure is kept equal to the atmospheric pressure, the internal sealing performance of the lightning arrester is invalid; the inner sealing performance of the arrester can be accurately monitored in real time by arranging the pressure sensor in the arrester casing.
(2) The lightning arrester leakage current monitoring and lightning arrester integrated design is firstly realized, the leakage current sensor is arranged at the inner bottom end of the lightning arrester, the leakage current flowing through the lightning arrester resistance card is directly monitored, the influence of factors such as environment temperature and humidity, electromagnetic interference and external insulation dirt is successfully solved, and experiments show that the accuracy of a measuring result is up to 99%.
(3) The method has the advantages that key state quantities such as the internal sealing performance, the resistive current and the phase angle of the lightning arrester are accurately monitored in real time, the running state of the lightning arrester is reflected in real time, and the method has great significance for preventing the lightning arrester from further expanding and developing, correctly guiding the maintenance work of the lightning arrester and ensuring the safety of a power grid.
(4) Adopt the utility model provides a monitoring integration arrester can replace arrester power failure test and live line detection, has practiced thrift a large amount of manpower and materials.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. The utility model provides a monitoring integration arrester, includes the arrester overcoat and sets up the arrester resistance card in it, its characterized in that still includes pressure sensor, sealing performance monitoring module, pressure sensor set up in the arrester overcoat with between the arrester resistance card, just pressure sensor with sealing performance monitoring module electricity is connected.
2. The integrated lightning arrester of claim 1, further comprising a leakage current sensor and a current monitoring module, wherein the leakage current sensor is arranged in the lightning arrester casing and is positioned at the bottom end of the lightning arrester resistor disc, and the leakage current sensor is electrically connected with the current monitoring module; the current monitoring module is also used for accessing a voltage reference signal and displaying real-time resistive current.
3. The monitoring integrated lightning arrester of claim 2, wherein the current monitoring module is further configured to derive and display a real-time phase angle based on the voltage reference signal and a full current signal transmitted by the leakage current sensor.
4. The monitoring integrated lightning arrester of claim 3, wherein the current monitoring module is further configured to display a real-time full current according to the full current signal transmitted by the leakage current sensor.
5. The monitoring integrated surge arrester of any of claims 2 to 4, wherein the leakage current sensor is a Roves coil.
6. The integrated monitoring arrester according to any one of claims 2 to 4, further comprising an epoxy resin plate with a bidirectional plug head, which is arranged on the arrester casing, wherein the pressure sensor and the epoxy resin plate with the bidirectional plug head are connected through a pressure transmission line, and the epoxy resin plate with the bidirectional plug head and the sealing performance monitoring module are connected through a pressure transmission line; the leakage current sensor is connected with the epoxy resin plate with the bidirectional plug head and the epoxy resin plate with the bidirectional plug head is connected with the current monitoring module through current transmission lines.
7. The integrated monitoring arrester according to claim 6, wherein the epoxy resin plate with the bidirectional plug head comprises an epoxy resin plate and a metal connecting sheet, the metal connecting sheet is embedded in the epoxy resin plate, two insertion holes communicated with the metal connecting sheet are respectively formed in two sides of the epoxy resin plate, and the insertion holes formed in the two sides of the epoxy resin plate are staggered with each other.
8. The monitoring integrated surge arrester of claim 6, wherein the pressure transmission line and the current transmission line are both double shielded lines.
9. The integrated lightning arrester with monitoring function according to claim 1, characterized in that the integrated lightning arrester with monitoring function further comprises a discharge counting meter, wherein the input end of the discharge counting meter is connected with a flange arranged at one end of the lightning arrester casing, the output end of the discharge counting meter is grounded, and the discharge counting meter is used for recording and displaying the discharge times of the integrated lightning arrester with monitoring function.
10. The monitoring integrated lightning arrester as claimed in claim 2, wherein the collection range of the pressure sensor is 0.1-0.2 Mpa, and the collection range of the leakage current sensor is 0-5 mA.
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| CN202022488995.4U CN213242108U (en) | 2020-11-02 | 2020-11-02 | Monitoring integration arrester |
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| CN202022488995.4U CN213242108U (en) | 2020-11-02 | 2020-11-02 | Monitoring integration arrester |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112216450A (en) * | 2020-11-02 | 2021-01-12 | 国网湖南省电力有限公司 | Monitoring integration arrester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112216450A (en) * | 2020-11-02 | 2021-01-12 | 国网湖南省电力有限公司 | Monitoring integration arrester |
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