CN218181017U - Gas insulated enclosed combined electrical apparatus on-line monitoring device and hydropower station monitoring system - Google Patents
Gas insulated enclosed combined electrical apparatus on-line monitoring device and hydropower station monitoring system Download PDFInfo
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- CN218181017U CN218181017U CN202222225388.8U CN202222225388U CN218181017U CN 218181017 U CN218181017 U CN 218181017U CN 202222225388 U CN202222225388 U CN 202222225388U CN 218181017 U CN218181017 U CN 218181017U
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Abstract
The invention relates to an online monitoring device of a gas insulated enclosed switchgear and a hydropower station monitoring system, which can reduce the occurrence of safety accidents by online monitoring of the partial discharge state of the gas insulated enclosed switchgear. The device comprises a gas insulated closed combined electrical appliance and is characterized in that a monitoring host is additionally arranged on the gas insulated closed combined electrical appliance, the device also comprises a sensing module and a data acquisition module, and the sensing module, the data acquisition module and the monitoring host are sequentially in communication connection; the sensing module comprises a plurality of ultrahigh frequency sensors, and each ultrahigh frequency sensor is respectively arranged on a circuit breaker, a main transformer interval and a line side interval of the gas insulated enclosed combined electrical apparatus; the data acquisition module comprises a plurality of data acquisition units, and each data acquisition unit is installed on the inner wall of the gas insulated closed combined electrical apparatus.
Description
Technical Field
The utility model relates to an on-line monitoring technical field, specifically, relate to a gas insulated switchgear on-line monitoring device and power station monitoring system.
Background
The Gas Insulated enclosed Switchgear (GIS) is composed of a breaker, a disconnector, a grounding switch, a mutual inductor, a lightning arrester, a bus, a connecting piece, an outgoing line terminal and the like, all of which are enclosed in a metal grounded shell, and SF6 insulating Gas with a certain pressure is filled in the metal grounded shell, so that the Gas Insulated enclosed Switchgear becomes an SF6 totally enclosed Switchgear.
When the enclosed construction of GIS is corroded and destroyed by external environment, can further bring a series of problems such as intaking, gas leakage, and because SF6 gas insulation ability is great by the influence of electric field uniform degree, insulating unusual easily takes place when there is pointed end or foreign matter in GIS inside, consequently need to monitor gas insulated enclosed switchgear local state.
SUMMERY OF THE UTILITY MODEL
The purpose of the present disclosure is to provide an online monitoring device for a gas insulated switchgear and a hydropower station monitoring system, which can reduce the occurrence of safety accidents by online monitoring of the partial discharge state of the gas insulated switchgear.
In order to achieve the above object, in a first aspect, the present disclosure provides an online monitoring device for a gas insulated switchgear assembly, including a gas insulated switchgear assembly, wherein a monitoring host is additionally installed on the gas insulated switchgear assembly, the device further includes a sensing module and a data acquisition module, and the sensing module, the data acquisition module and the monitoring host are sequentially connected in a communication manner;
the sensing module comprises a plurality of ultrahigh frequency sensors, and each ultrahigh frequency sensor is respectively arranged on a circuit breaker, a main transformer interval and a line side interval of the gas insulated enclosed combined electrical apparatus;
the data acquisition module comprises a plurality of data acquisition units, and each data acquisition unit is installed on the inner wall of the gas insulated closed combined electrical apparatus.
Optionally, the high frequency sensors include view window sensors, each of which is threadably connected to a view window of the circuit breaker, the main transformer bay, and the line side bay, respectively.
Optionally, the data acquisition units are fixed on the inner wall of the cable layer in the gas insulated enclosed switchgear through expansion screws, each data acquisition unit is connected in a hand-pulling manner, and a slot box is disposed between the gas insulated enclosed switchgear and the data acquisition unit.
Optionally, coaxial cables are laid between a preset number of ultrahigh frequency sensors and the same data acquisition unit for communication, and the coaxial cables are wrapped by stainless steel metal plastic-coated hoses.
Optionally, the device still includes gaseous monitoring module, gaseous monitoring module includes the SF6 host computer and a plurality of gaseous little water sensor of SF6, the SF6 host computer is integrated in the monitoring host computer, the gaseous little water sensor fixed mounting of SF6 is in on the air chamber disk seat of gas insulated switchgear, SF6 host computer and each lay the sensor cable between the gaseous little water sensor of SF 6.
Optionally, 485 cables are laid between each SF6 gas micro-water sensor and the monitoring host.
Optionally, the SF6 gas micro-water sensor is fixedly connected to a three-way valve, and a female screw end of the three-way valve is in threaded sealing connection with the air chamber valve seat.
Optionally, the apparatus further comprises an optical fiber fusion box and a photoelectric conversion unit, wherein the optical fiber fusion box and the photoelectric conversion unit are installed in a secondary disc chamber service cabinet of the insulated enclosed switchgear.
Optionally, an optical cable is laid between the monitoring host and the secondary disc chamber service cabinet, and the optical cable is a multimode armored optical cable.
In a second aspect, the present disclosure further provides a hydropower station monitoring system, which includes the gas insulated enclosed switchgear online monitoring device of the first aspect.
Through the technical scheme, the ultrahigh frequency sensor is additionally arranged on the gas insulated closed combined electrical apparatus, the data acquisition unit and the SF6 gas micro-water sensor are configured in the gas insulated closed combined electrical apparatus to form an integrated monitoring platform, so that the gas insulated closed combined electrical apparatus can be monitored on line, and the occurrence probability of safety accidents is reduced.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
FIG. 1 is a block diagram illustrating an online monitoring device for a gas insulated switchgear enclosure according to an exemplary embodiment;
FIG. 2 is a schematic diagram illustrating an UHF sensor installation of an in-line monitoring device for a gas insulated switchgear enclosure according to an exemplary embodiment;
FIG. 3 is a schematic view of a tank deployment of an in-line monitoring device for a gas insulated switchgear enclosure, according to an exemplary embodiment;
fig. 4 is a schematic view illustrating installation of a gas monitoring module of an online monitoring device of a gas insulated switchgear according to an exemplary embodiment.
Description of the reference numerals
1 monitoring host 2 sensing module 3 data acquisition module
4 ultrahigh frequency sensor 5 circuit breaker 6 main transformer interval
7 line side interval 8 data acquisition unit 9 observation window
10 groove box 11 gas circuit valve A12 valve seat B
13 three-way valve 14SF6 gas micro-water sensor 15SF6 host
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.
The implementations described in the exemplary embodiments below do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
It should be noted that in the present disclosure, the terms "S101", "S102" and the like in the description and claims and the drawings are used for distinguishing the steps, and are not necessarily to be construed as performing the method steps in a specific order or sequence.
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
It should be noted that all actions of acquiring signals, information or data in the present disclosure are performed under the premise of complying with the corresponding data protection regulation policy of the country of the location and obtaining the authorization given by the owner of the corresponding device.
The invention provides an online monitoring device for a gas insulated enclosed switchgear and a hydropower station monitoring system, which are used for realizing integrated online monitoring of gas micro-water, gas leakage and partial discharge states in the gas insulated enclosed switchgear.
Fig. 1 is a block diagram of an online monitoring device for a Gas Insulated Switchgear assembly according to an exemplary embodiment, which is applied to a Gas Insulated Switchgear (GIS, hereinafter referred to as GIS device) area of a 500kV Gas Insulated Switchgear assembly of a great river, as shown in fig. 1, the online monitoring device for a Gas Insulated Switchgear assembly includes a Gas Insulated Switchgear assembly, a monitoring host 1 is additionally installed on the Gas Insulated Switchgear assembly, and the online monitoring device for a Gas Insulated Switchgear assembly further includes a sensing module 2 and a data acquisition module 3, the sensing module 2, the data acquisition module 3 and the monitoring host 1 are sequentially connected in a communication manner;
the sensing module 2 comprises a plurality of ultrahigh frequency sensors 4, and each ultrahigh frequency sensor 4 is respectively arranged on a circuit breaker 5, a main transformer interval 6 and a line side interval 7 of the gas insulated enclosed combined electrical apparatus;
the data acquisition module 3 comprises a plurality of data acquisition units 8, and each data acquisition unit 8 is installed on the inner wall of the gas insulated closed combined electrical apparatus.
Specifically, the additional installation of monitoring host computer includes: one side of the cabinet which is arranged close to the wall in a 500kV GIS area comprises 800 mm (width) 800 mm (depth) 2260 mm, a lower layer bridge frame is connected below the cabinet, and a sensor intelligent signal terminal, an industrial personal computer, a watchdog alarm indicator lamp panel, an optical switch, a display and the like are arranged inside the cabinet.
According to the online monitoring device for the gas insulated enclosed combined electrical appliance, the monitoring host, the data acquisition module and the data acquisition unit are additionally arranged in the GIS equipment, so that the state information of the GIS equipment during partial discharge is acquired, the online monitoring of the partial discharge state of the GIS equipment is realized, and the occurrence of safety accidents is reduced.
Further, the high frequency sensor 4 comprises observation window type sensors, and each observation window type sensor is respectively in threaded connection with the circuit breaker 5, the main transformer interval 6 and an observation window 9 of the line side interval 7.
Referring to fig. 1, in the present disclosure, observation window type sensors are respectively installed on observation windows 9 of a circuit breaker 5, a main transformer interval 6 and a line side interval 7 of a GIS device, wherein 12 observation window type sensors are installed on the circuit breaker 5, 6 observation window type sensors are respectively installed on the main transformer interval 6 and the line side interval 7, and 18 observation window type sensors are installed in total.
Referring to fig. 2, the cover plate on the observation window 9 at the position to be installed is removed and replaced with an observation window type sensor, so that the observation window type sensor is installed.
The installation mode of the high-frequency sensor is simple and rapid, and the local discharge state information of the GIS equipment can be collected in real time.
Further, the data acquisition units 8 are fixed on the inner wall of the cable layer in the gas insulated enclosed switchgear through expansion screws, the data acquisition units 8 are connected in a hand-pulling mode, and a groove box 10 is arranged between the gas insulated enclosed switchgear and the data acquisition units 8.
Referring to fig. 3, 3 data acquisition units 8 are arranged at a cable layer in a 500kV GIS area, each data acquisition unit 8 is designed to be hung on a wall and fixed on the wall by means of an expansion screw, and a trough box 10 is arranged from a bridge of the GIS equipment to the bottom of each data acquisition unit 8.
Laying a 4 x 2.5mm layer from the first data acquisition unit to the detection host machine on the GIS equipment side 2 According to the light armored power cable, the two subsequent data acquisition units are connected with the first data acquisition unit in a hand-pulling mode, and an 8-core armored optical fiber is laid from each data acquisition unit to the monitoring host.
And the state information acquired by the high-frequency sensor is transmitted to the monitoring host through the data acquisition unit so as to realize the online monitoring of the state information of the partial discharge of the GIS equipment.
In the present disclosure, the current between the monitoring host and each element is AC220V, and the power line is wired at AC220V (50 Hz).
Furthermore, coaxial cables are laid between the preset number of ultrahigh frequency sensors 4 and the same data acquisition unit 8 for communication, and the coaxial cables are wrapped by stainless steel metal plastic-coated hoses.
The preset number can be preset according to the frequency of partial discharge in the running process of the GIS equipment, and the method is not specifically limited in the disclosure.
In a GIS equipment area, every 6 ultrahigh frequency data sensors transmit acquired signals to a data acquisition unit through a coaxial cable, and stainless steel metal plastic-coated hoses are adopted between the ultrahigh frequency data sensors and a lower groove box of the data acquisition unit to connect and wrap the coaxial cable.
The signals collected by the ultrahigh frequency data sensors are sent to the data collecting unit, wiring work can be reduced, cost is reduced, the stainless steel metal plastic-coated hose has the advantages of good flexibility, corrosion resistance, high temperature resistance, wear resistance, tensile resistance and the like, a coaxial cable can be protected, and the service time of the coaxial cable is prolonged.
Further, the device also comprises a gas monitoring module, wherein the gas monitoring module comprises an SF6 host 15 and a plurality of SF6 gas micro-water sensors 14, the SF6 host 15 is integrated in the monitoring host 1, the SF6 gas micro-water sensors 14 are fixedly installed on a gas chamber valve seat of the gas insulated closed combined electrical appliance, and sensor cables are laid between the SF6 host 15 and each SF6 gas micro-water sensor 14.
The installation mode of the SF6 gas micro-water sensor is simple and quick, the pressure, density, temperature, dew point, PPM value and other information of SF6 gas in the GIS equipment can be collected in real time, and the SF6 gas micro-water sensor information is transmitted to the monitoring host through the SF6 host so as to realize online monitoring of gas micro-water and gas leakage of the GIS equipment.
Further, 485 cables are laid between each SF6 gas micro-water sensor 14 and the monitoring host 1.
Adopt 485 cables to communicate, be favorable to reducing the echo reflection of signal between SF6 gas trace water sensor and monitoring host computer, improved the interference killing feature of channel, realize the signal long-line transmission distance maximize.
Furthermore, an SF6 gas micro-water sensor 14 is fixedly connected to a three-way valve 13, and a female screw end of the three-way valve is in threaded sealing connection with a valve seat of the gas chamber.
Referring to fig. 4, the installation of the gas detection module includes:
step S101: and determining that the air chamber where the valve seat B12 is located is permitted to be modified, and sending a low air pressure (locking) signal by a density relay of the modified air chamber in the modification process.
Step S102: and cleaning the surfaces of the valve seat B12 and the density relay, and performing waterproof and dustproof treatment. And opening the protective cover, and closing the air path valve A11 on the valve seat B12 according to the indication direction on the protective cover, so that the air chamber and the valve body are ensured to be separated, and air leakage in the transformation process is avoided.
Step S103: the protection cover of the valve seat B12 is opened, the self-sealing valve on the valve seat B12 is intact, the sealing surface is not damaged and has no pollutant adhesion, and under the condition that the sealing surface of the three-way valve 13 provided with the SF6 gas micro-water sensor 14 is not damaged and has no pollutant adhesion, the female screw end (the ferromagnetic end) of the three-way valve is in threaded connection with the valve seat B, and the sealing ring M11 is lubricated in the connection process.
Step S104: the concave end (male end) of the three-way valve 13 is pushed open, the original air in the three-way valve 13 is discharged, the air path valve A is slowly opened, and the air in the air chamber is used for flushing the valve body until no air remains in the three-way valve 13.
Step S105: and connecting the sensor cable to the SF6 host 15 through the wire duct according to the cable laying requirement, and wiring and debugging the SF6 gas micro-water sensor.
Step S106: and binding the joint parts, and finishing the installation under the condition that the leak detection is carried out by a leak detector and the air leakage of each joint is avoided.
Specifically, cabling requirements include:
1. when the cables are threaded, each cable is numbered in sequence and marked, so that construction, installation, debugging and troubleshooting are facilitated.
2. The cable at the front end device is left with a margin (at least 2 m) to facilitate flexible installation when connecting the devices.
3. The sheath at the cable threading position that needs to turn round carries out protection processing to avoid because of the shielding layer ground connection that cable sheath wearing and tearing caused, and then lead to the multiple spot ground connection of system.
4. The cable outside the bridge frame needs to be protected by a stainless steel metal plastic-coated hose.
5. The cable wiring must strictly comply with the spacing to the heavy current cable.
Further, the device also comprises an optical fiber fusion box and a photoelectric conversion unit, wherein the optical fiber fusion box and the photoelectric conversion unit are installed in a secondary disc chamber service cabinet of the insulated enclosed combined electrical apparatus.
The photoelectric conversion unit converts the optical signals acquired by the high-frequency sensor into electric signals, so that subsequent information processing is facilitated, the on-line monitoring of the partial discharge state of the GIS equipment is realized, and the occurrence of safety accidents is reduced.
Further, an optical cable is laid between the monitoring host 1 and the secondary disk chamber service cabinet, and the optical cable is a multimode armored optical cable.
The multimode armored optical cable is used for transmission, so that the interference of strong electromagnetism in the complex environment of the power transformer substation can be reduced.
The system debugging method comprises the following steps of after all devices are installed, carrying out system debugging:
1. power supply inspection
Switching on a control main power switch, and detecting the voltage of the alternating current power supply; checking the power supply voltage by using a universal meter; switching on a power distribution switch, and checking voltage at each output end, DC output polarity and the like; after the error is confirmed, each loop is powered on.
2. Line inspection
And checking whether various wiring is correct or not, and performing polishing check on each optical fiber after the optical fibers are fused to ensure that data signal transmission is normal.
3. Partial discharge signal debugging
Ensuring that each power supply loop is normal and the optical fiber communication and the time synchronization are accurate; adding sensor information, interval information, acquisition interval time and the like of each data acquisition unit; when the analog partial discharge signals are injected beside each sensor through the signal generator, the states of a channel, a coaxial cable and the like are confirmed to be normal; and if the information is uploaded stably and the connection of each sensor is not disconnected, the system is normal.
4. Data access
The sensing module and the data acquisition module form a partial discharge online monitoring module, the partial discharge online monitoring module and the gas monitoring module are connected into a GIS equipment control system to be drawn into a uniform interface, integrated monitoring platform software is configured, state output is carried out, and integrated monitoring is achieved.
In particular, the relevant devices in the present disclosure can be seen in the following table:
TABLE 1
The online monitoring device for the gas insulated closed combined electrical appliance is obtained by additionally arranging the local discharge online monitoring module (comprising the ultrahigh frequency sensor, the data acquisition unit and the monitoring host) and the gas monitoring module (comprising the SF6 gas micro-water sensor and the SF6 host) in the GIS equipment, and can realize the integrated online monitoring of local discharge, gas density and gas leakage.
Based on the same invention concept, the invention also provides a hydropower station monitoring system which comprises the gas insulated closed combined electrical appliance on-line monitoring device.
The hydropower station monitoring system can be used for carrying out integrated on-line monitoring on partial discharge, on-line monitoring on gas density and integrated on-line monitoring on gas leakage on GIS equipment in a power station.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner to avoid unnecessary repetition, and the disclosure does not separately describe various possible combinations.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. The online monitoring device for the gas insulated enclosed switchgear comprises the gas insulated enclosed switchgear and is characterized in that a monitoring host (1) is additionally arranged on the gas insulated enclosed switchgear, the online monitoring device also comprises a sensing module (2) and a data acquisition module (3), wherein the sensing module (2), the data acquisition module (3) and the monitoring host (1) are sequentially in communication connection;
the sensing module (2) comprises a plurality of ultrahigh frequency sensors (4), and each ultrahigh frequency sensor (4) is respectively arranged on a circuit breaker (5), a main transformer interval (6) and a line side interval (7) of the gas insulated enclosed switchgear;
the data acquisition module (3) comprises a plurality of data acquisition units (8), and each data acquisition unit (8) is installed on the inner wall of the gas insulated closed combined electrical apparatus.
2. The device according to claim 1, characterized in that the high-frequency sensors (4) comprise observation window sensors, each of which is screwed to an observation window (9) of the circuit breaker (5), the main transformer bay (6) and the line side bay (7), respectively.
3. The device according to claim 1, characterized in that the data acquisition units (8) are fixed on the inner wall of the cable layer in the gas insulated enclosed switchgear through expansion screws, each data acquisition unit (8) is connected in a hand-pulling manner, and a slot box (10) is arranged between the gas insulated enclosed switchgear and the data acquisition unit (8).
4. The device according to claim 1, characterized in that a preset number of said uhf sensors (4) communicate with the same data acquisition unit (8) by means of coaxial cables wrapped in stainless steel metal-plastic-coated hoses.
5. The device according to claim 1, further comprising a gas monitoring module, wherein the gas monitoring module comprises an SF6 host (15) and a plurality of SF6 gas micro water sensors (14), the SF6 host (15) is integrated in the monitoring host (1), the SF6 gas micro water sensors (14) are fixedly installed on a gas chamber valve seat of the gas insulated closed switchgear, and a sensor cable is laid between the SF6 host (15) and each SF6 gas micro water sensor (14).
6. The device according to claim 5, characterized in that 485 cables are laid between each SF6 gas micro-water sensor (14) and the monitoring host (1).
7. The device according to claim 5, characterized in that the SF6 gas micro-water sensor (14) is fixedly connected to a three-way valve (13), and a female screw end of the three-way valve (13) is in threaded sealing connection with the air chamber valve seat.
8. The apparatus according to claim 1, further comprising a fusion-splicing box and a photoelectric conversion unit, which are installed in a secondary-tray-room service cabinet of the insulated enclosed switchgear.
9. The device according to claim 8, characterized in that an optical cable is laid between the monitoring host (1) and the secondary disc chamber service cabinet, and the optical cable is a multimode armored optical cable.
10. A hydropower station monitoring system, characterized by comprising the gas insulated switchgear assembly on-line monitoring device of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222225388.8U CN218181017U (en) | 2022-08-23 | 2022-08-23 | Gas insulated enclosed combined electrical apparatus on-line monitoring device and hydropower station monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222225388.8U CN218181017U (en) | 2022-08-23 | 2022-08-23 | Gas insulated enclosed combined electrical apparatus on-line monitoring device and hydropower station monitoring system |
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| Publication Number | Publication Date |
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| CN218181017U true CN218181017U (en) | 2022-12-30 |
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| CN202222225388.8U Active CN218181017U (en) | 2022-08-23 | 2022-08-23 | Gas insulated enclosed combined electrical apparatus on-line monitoring device and hydropower station monitoring system |
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- 2022-08-23 CN CN202222225388.8U patent/CN218181017U/en active Active
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