CN212180948U

CN212180948U - Insulation monitoring cabinet

Info

Publication number: CN212180948U
Application number: CN202020343579.2U
Authority: CN
Inventors: 李青松; 艾建红
Original assignee: Anhui Spady Electric Technology Co ltd
Current assignee: Anhui Spady Electric Technology Co ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-12-18
Anticipated expiration: 2030-03-18

Abstract

The utility model discloses an insulation monitoring cabinet relates to the insulating monitoring technology field of electric power system, the intelligent cabinet temperature adjusting device comprises a cabinet body, the surface both ends of the cabinet body all are provided with the wall bushing that runs through the three-phase alternating current, the front end surface of the cabinet body is provided with insulation monitoring controller, transient state route selection controller, the voltmeter, phase line voltage change over switch, the inside top of the cabinet body is provided with little bus-bar room, the below of little bus-bar room is for being provided with the secondary room, the internal middle part of cabinet is provided with main bus-bar room, the internal bottom of cabinet is provided with multi-functional arrester, multi-functional arrester's top binding post connects high voltage isolator, high voltage isolator's the other end and station in the complete set cabinet owner mother arrange or high tension cable connect, multi. Insulation monitoring cabinet, be applicable to 35kV and following distribution network system, fuse partial discharge monitoring, full voltage monitoring and trouble route selection in an organic whole, solve the problem of insulation monitoring and fault handling that the user is most concerned about.

Description

Insulation monitoring cabinet

Technical Field

The utility model relates to an electric power system insulation monitoring technology field, in particular to insulation monitoring cabinet.

Background

In the electrical faults of the distribution network system of 35kV or below, the insulation faults account for more than 80%. The insulation deterioration of the electrical equipment, which first reacts microscopically to an increase in the amount of partial discharge. Partial discharge is an important cause of the final insulation breakdown of high-voltage electrical equipment and also an important sign of insulation degradation, and when insulation degradation reaches a certain degree or a system has an insulation fault under the action of various overvoltage, the system generally shows instantaneous flashover or breakdown of single-phase insulation, namely single-phase ground fault. The voltage abnormality is macroscopically expressed at the moment, and the detection, recording and analysis of the voltage abnormality have very important significance for accident early warning, accident reason confirmation, accident responsibility confirmation and prevention of repeated occurrence of similar accidents. The key technology for dealing with single-phase earth faults is to quickly determine a fault line and eliminate earth arc.

Aiming at the problems in the related technology, an insulation monitoring cabinet is provided based on the fault phase judging technology of the full-true partial discharge online monitoring technology, the transient characteristic frequency band line selection technology and the grounding resistance tracking method, a scientific insulation online monitoring and diagnosing system can predict the insulation reliability and the service life of electrical equipment in advance, find faults in the early stage, provide a governing strategy and prevent the insulation faults.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides an insulation monitoring cabinet, and then solve the problem among the above-mentioned background art.

(II) technical scheme

In order to achieve the above object, the utility model adopts the following specific technical scheme:

the utility model provides an insulation monitoring cabinet, includes the cabinet body, the surface both ends of the cabinet body all are provided with the wall bushing that runs through the three-phase alternating current, the front end surface of the cabinet body is provided with insulation monitoring controller, transient state route selection controller, voltmeter, phase line voltage change over switch, the inside top of the cabinet body is provided with little bus-bar room, the below of little bus-bar room is for being provided with the secondary room, and the internal middle part of cabinet is provided with the main bus-bar room, and the internal bottom end of cabinet is provided with multi-functional arrester, high voltage isolator is connected to multi-functional arrester's top binding post, and main female row or high tension cable connection in high voltage isolator's the other end and the station complete set cabinet, be connected with the electrified sensor of high voltage between high voltage isolator and the multi-functional arrester.

Further, the front end of the cabinet body is provided with an upper door, a middle door and a lower door.

Furthermore, the insulation monitoring controller, the transient state line selection controller, the voltmeter and the phase line voltage change-over switch are all located on the upper door.

Furthermore, the upper door, the middle door and the lower door are all provided with electronic locks, and the inner sides of the upper door, the middle door and the lower door are all provided with illuminating lamps.

Furthermore, the middle door and the lower door are both provided with observation windows.

Furthermore, one end of the high-voltage isolating switch is connected with an operating mechanism, and the other end of the operating mechanism is connected to the inner side of the middle door or directly used for isolating the handcart.

Further, a heater is arranged inside the cabinet body.

(III) advantageous effects

Compared with the prior art, the utility model provides an insulation monitoring cabinet possesses following beneficial effect:

1. partial discharge pC value is directly monitored by utilizing a partial discharge monitoring and voltage monitoring interface of the multifunctional lightning arrester, and lightning overvoltage, operation overvoltage and various power frequency voltage anomalies can be monitored and recorded based on a broadband high-voltage charged sensor with a bandwidth of more than 20MHz and high-speed synchronous sampling with a single channel of more than 20 MHz.

2. The method is based on a transient characteristic frequency band line selection technology of rapid sampling, fault line selection is carried out by utilizing transient signals, the speed is high, the criterion is only and not influenced by a system grounding mode, system signals are collected, special equipment is not added, and no influence is caused on system operation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and 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 an appearance structure diagram of an insulation monitoring cabinet according to the utility model.

Fig. 2 is a schematic view of the cross-sectional structure according to fig. 1.

Fig. 3 is a schematic diagram of a partial discharge system according to the present invention.

In the figure:

1. a cabinet housing; 2. a wall bushing; 3. a door is arranged; 4. a middle door; 5. a lower door; 6. an observation window; 7. an electronic lock; 8. an insulation monitoring controller; 9. a transient state line selection controller; 10. a voltmeter; 11. a phase line voltage transfer switch; 12. a secondary chamber; 13. a high voltage isolation switch; 14. an operating mechanism; 15. a high voltage charge sensor; 16. a main bus bar chamber; 17. a multifunctional lightning arrester; 18. a heater; 19. a ground bar; 20. a small bus bar chamber.

Detailed Description

For further explanation of the embodiments, the drawings are provided as part of the disclosure and serve primarily to illustrate the embodiments and, together with the description, to explain the principles of operation of the embodiments, and to provide further explanation of the invention and advantages thereof, it will be understood by those skilled in the art that various other embodiments and advantages of the invention are possible, and that elements in the drawings are not to scale and that like reference numerals are generally used to designate like elements.

According to the utility model discloses an embodiment provides an insulation monitoring cabinet.

The invention will now be further described with reference to the accompanying figures 1-3 and the detailed description:

the insulation monitoring cabinet of this embodiment, as shown in fig. 1, includes a cabinet body 1, two ends of the outer surface of the cabinet body 1 are both provided with a wall bushing 2 for connecting three-phase alternating current, the outer surface of the front end of the cabinet body 1 is provided with a voltage insulation monitoring controller 8, a transient state line selection controller 9, a voltmeter 10, and a phase line voltage switch 11, as shown in fig. 2, the top end of the interior of the cabinet body 1 is provided with a small bus chamber 20, a secondary chamber 12 is arranged below the small bus chamber 20, the middle part of the interior of the cabinet body 1 is provided with a main bus chamber 16, the bottom end of the interior of the cabinet body 1 is provided with a multifunctional lightning arrester 17, a top terminal of the multifunctional lightning arrester 17 is connected with a high-voltage isolating switch 13, a high-voltage live sensor 15 is connected between the high-voltage isolating switch 13 and the multifunctional lightning arrester 17, a broadband high, the real-time induction voltage and the detection multi-functional lightning arrester 17's binding post have electricity and record, and high voltage isolator 13's the other end is connected with wall bushing 2, and the ground connection row 19 is connected to multi-functional lightning arrester 17's bottom.

The front end of the cabinet body 1 is provided with the upper door 3, well door 4 and lower door 5, insulating monitoring controller 8, transient state route selection controller 9, voltmeter 10, phase line voltage change over switch 11 all is located upper door 3, be convenient for operator's operation and look over, upper door 3, all be provided with electronic lock 7 on well door 4 and the lower door 5, prevent that the error from opening, upper door 3, the inboard of well door 4 and lower door 5 all is provided with the light, provide the illumination, all be provided with observation window 6 on well door 4 and the lower door 5, be convenient for observe the cabinet body 1 inside from the outside, the one end of high voltage isolator 13 is connected with operating device 14, and operating device 14's the other end is connected in well door 4 inboard, one side of multi-functional arrester 17 is provided with heater 18, make the ambient temperature and the humidity of multi-functional arrester 17 in controllable within range.

Through the mutual cooperation of multi-functional arrester 17 and the insulation monitoring controller 8 that sets up, multi-functional arrester 17 becomes capacitanc partial discharge detection sensor based on dry-type capacitor sleeve, zinc oxide nonlinear resistor assembles at the intraductal portion of cover, constitute partial discharge and detect and voltage monitoring port, by the pC value of the multi-functional arrester 17 on-line monitoring partial discharge of insulation monitoring controller 8 control, based on broadband high voltage electrified sensor 15 more than bandwidth 20MHz, the high-speed synchronous sampling more than the single channel 20MHz, monitoring and record thunderbolt overvoltage, operation overvoltage and various power frequency voltage are unusual, the display device to insulation monitoring controller 8 is uploaded to the rethread signal cable.

The method comprises the steps of collecting bus zero sequence voltage, arc suppression coil current and zero sequence current of each feeder line in real time through a transient line selection controller 9, a small bus chamber 11 and a main bus chamber 16 in a control cabinet, calculating characteristic frequency bands according to system structure parameters through the transient line selection controller 9, calculating characteristic frequency band transient energy and instantaneous zero sequence power of each element, comparing the characteristic frequency band transient energy and the instantaneous zero sequence power with system parameter values, taking the corresponding element as a steady state line selection result, finally indicating a fault line, and displaying the result on a display device of the transient line selection controller 9.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an insulation monitoring cabinet, includes the cabinet body (1), its characterized in that: the wall bushing type wall-penetrating lightning arrester is characterized in that wall bushing (2) penetrating through three-phase alternating current is arranged at two ends of the outer surface of the cabinet body (1), an insulation monitoring controller (8), a transient state line selection controller (9), a voltmeter (10) and a phase line voltage change-over switch (11) are arranged on the outer surface of the front end of the cabinet body (1), a small bus chamber (20) is arranged at the top end of the interior of the cabinet body (1), a secondary chamber (12) is arranged below the small bus chamber (20), a main bus chamber (16) is arranged in the middle of the interior of the cabinet body (1), a multifunctional lightning arrester (17) is arranged at the inner bottom end of the cabinet body (1), a top terminal of the multifunctional lightning arrester (17) is connected with a high-voltage isolating switch (13), the other end of the high-voltage isolating switch (13) is connected with a main bus bar penetrating through the wall bushing (2), and a high-voltage, the bottom end of the multifunctional lightning arrester (17) is connected with a grounding bar (19).

2. The insulation monitoring cabinet according to claim 1, characterized in that the front end of the cabinet body (1) is provided with an upper door (3), a middle door (4) and a lower door (5).

3. The insulation monitoring cabinet according to claim 2, wherein the insulation monitoring controller (8), the transient state line selection controller (9), the voltmeter (10) and the phase line voltage switch (11) are all located on the upper door (3).

4. The insulation monitoring cabinet according to claim 2, wherein the upper door (3), the middle door (4) and the lower door (5) are all provided with electronic locks (7), and the inner sides of the upper door (3), the middle door (4) and the lower door (5) are all provided with illuminating lamps.

5. An insulation monitoring cabinet according to claim 2, characterized in that the middle door (4) and the lower door (5) are provided with observation windows (6).

6. The insulation monitoring cabinet according to claim 2, wherein one end of the high-voltage isolating switch (13) is connected with an operating mechanism (14), and the other end of the operating mechanism (14) is connected with an isolating function with an obvious fracture on the inner side of the middle door (4) or an isolating function with an isolating handcart.

7. An insulation monitoring cabinet according to claim 1, characterized in that a heater (18) is arranged inside the cabinet body (1).