A kind of intelligent middle metal-clad moveable voltage sensing device
Technical field
The utility model relates to voltage sensing device, is a kind of being applied in the electric power system that electric pressure is 40.5kV, and the measurement device that a step protects of going forward side by side belongs to the power distribution device to circuit.
Background technology
At present, the domestic voltage sensing device that is applied in the 40.5kV electric pressure circuit is that common electromagnetic potential transformer and lightning arrester are combined on the handcart, and console mode is installed in the metal armouring cabinet, and there is following deficiency in this version:
1, the electromagnetic potential transformer volume is too huge, thereby makes that the volume of handcart is big, the external form heaviness, and Operation and Maintenance is extremely inconvenient;
2, lightning arrester is installed on the handcart jointly,, comprises the damage that causes electromagnetic potential transformer on the handcart occurring accident to be magnified under the opposite extreme situations when lightning arrester.
3, the operation of lightning arrester needs very reliable ground connection, when being installed on the handcart by lightning arrester, its ground connection mainly relies on the duck-beak type contact that is provided with between handcart and the cabinet to implement to be connected, may produce permanent deformation that certain electric power vibrations and repeatable operation cause duckbilled etc. because electromagnetic potential transformer is in service, cause the loosening of duck-beak type contact, the lightning arrester reliability of operation is reduced.
4, handcart complex structure, device layout are messy, are unfavorable for satisfying the requirement of insulation, thus, also cause the integral protection grade to reduce, and are unfavorable for safety.
5, owing to adopt electromagnetic potential transformer, the error of measuring in actual motion is big, saturated phenomenon can occur, and output signal can not be directly and microcomputer metering and protect equipment interface, easily produces ferro resonance etc.
6, each chamber communicates with each other, and degree of protection is lower, has certain potential safety hazard.
Intelligence sensor does not have iron core, insulation system is simple and reliable, volume is little, quality is little, good, the no saturated phenomenon of the linearity, output signal can directly be connected with microcomputer metering and protection equipment interface.At present, intellectual transducer all is the inside that is fixedly installed on switch cubicle, and this form obviously is not easy to maintenance, can't reach middle.
The utility model content
The utility model is for avoiding above-mentioned existing in prior technology weak point, a kind of intelligent middle metal-clad moveable voltage sensing device with integration modular structure is provided, make it than traditional voltage transformer cabinet, simple in structure, convenient for installation and maintenance, structural configuration is attractive in appearance rationally, volume is smaller and more exquisite, degree of protection is higher.
The utility model technical solution problem adopts following technical scheme:
The design feature of the intelligent middle metal-clad moveable of the utility model voltage sensing device is:
The inner chamber separation of the cabinet of metal armouring is set to bus-bar room, intelligence sensor chamber, cable vault and control room;
The intelligence sensor handcart that adopts modularization to be provided with in cabinet, is provided with the guide rail of confession intelligence sensor handcart slippage thereon between the side plate of the base plate of intelligence sensor chamber and cabinet.
Design feature of the present utility model also is:
The bus-bar room of described separation setting, intelligence sensor chamber, cable vault and the control room position distribution in cabinet are: the intelligence sensor chamber is positioned at the middle part, front side, bus-bar room is on top and be positioned at the rear portion of intelligence sensor chamber, and the cable vault is in the bottom of bus-bar room; The control room is positioned at the top of intelligence sensor chamber.
Described bus-bar room, intelligence sensor chamber and cable vault are provided with the pressure release top board separately, and the pressure release top board is respectively bus-bar room pressure release top board, cable vault's pressure release top board and intelligence sensor chamber pressure release top board.
Switching lightning arrester in circuit in good time is set on the base plate of cable vault, and with the discharge counter of the record discharge time of the supporting setting of lightning arrester.
Totally-enclosed insulation valve is adopted in described intelligence sensor chamber.
Compared with the prior art, the utility model beneficial effect is embodied in:
1, the utility model adopts the intelligence sensor handcart that modularization is provided with, and makes cabinet body structure simple, convenient for installation and maintenance, and allomeric function is more perfect, degree of protection reaches the IP4X level;
2, the intelligence sensor that the utility model adopted does not contain iron core, thereby has eliminated problems such as magnetic saturation and ferro resonance, and anti-electromagnetic interference performance is good, and step-down side does not exist open circuit high pressure and risk of short-circuits; The trend that has also adapted to simultaneously electric-power metering and protection digitlization, microcomputerization and automation development, exportable simulation, two kinds of signals of numeral can directly be exported to computer with data, avoid intermediate link.
3, the utility model separate to be provided with the cabinet inner chamber by function, makes the raising that overall structure is compact more, help operation effectiveness and effectiveness, has guaranteed the reliability of circuit supply simultaneously.
4, in the utility model cabinet by function separate, each chamber independent of each other has pressure relief channels separately respectively, can guarantee to open rapidly under the extreme case occurring that the rapid release internal pressure guarantees to move the safety of on-the-spot and personnel's equipment.
5, the utility model is arranged on lightning arrester the base plate of cable vault; can be able to switching by the mobile lightning arrester that makes of intelligence sensor handcart on the cabinet central guide track in good time; thereby realize protection to the anti-lightning impulse of circuit; and write down the number of times of discharge automatically by discharge counter, the influence of analysis circuit the system number of times of accepting lightning impulse and the degree that suffers damage is provided for operation and attendant.
6, the utility model adopts totally-enclosed insulation valve in the intelligence sensor chamber, when valve is closed, can carry out integrally closed to devices such as contact boxs, form effective isolation, guarantee that operator and repair and maintenance personnel can not touch electrified body and epoxy body contact box, have good safe antistatic performance, guarantee the security reliability of moving.
Description of drawings
Fig. 1 is the utility model master TV structure schematic diagram.
Fig. 2 is the utility model side-looking structural representation.
Number in the figure: 1 cabinet, 2 bus-bar rooms, intelligence sensor chambers 3,4 cable vaults, 5 control rooms, 6 intelligence sensor handcarts, 7 guide rails, 8 copper bar buses, 9 secondary plug-in units, 10 valve, 11 intelligent controllers, 12 Mume flower contacts, 13 insulators, 14 wall bushings, 15 contact boxs, 16 fixed contacts, 17 lightning arresters, 18 discharge counters, 19 intelligence sensors, coping is rushed down in 20 cable vaults, 21 bus-bar rooms rush down coping, coping is rushed down in intelligence sensor chambers 22,23 valve guide rails, 24 valve pushing mechanisms.
Below by embodiment, the utility model is described in further detail in conjunction with the accompanying drawings.
Embodiment
Referring to Fig. 1; Fig. 2; adopt the intelligence sensor handcart 6 that is provided with modularization in the present embodiment; in cabinet 1; between the side plate of the base plate of intelligence sensor chamber 3 and cabinet 1, be provided with guide rail 7 for 6 slippages thereon of intelligence sensor handcart; intelligence sensor handcart 6 is by moving on guide rail 7; its anterior three groups of Mume flower contact 12 that are provided with fixed contact 16 interior with being installed in contact box 15 reliably contacted; guarantee to be connected in lightning arrester 17 in the circuit reliably when effectively measuring; thereby circuit is implemented effectively protection; on intelligence sensor handcart 6, also be provided with the secondary plug-in unit of being convenient to continue with transmission signals 9.
The inner chamber separation of the cabinet 1 of metal armouring is set to bus-bar room 2, intelligence sensor chamber 3, cable vault 4 and control room 5.Separating the bus-bar room 2, intelligence sensor chamber 3, cable vault 4 and control room 5 position distribution in cabinet 1 that are provided with is: intelligence sensor chamber 3 is positioned at the middle part, front side, bus-bar room 2 is on top and be positioned at the rear portion of intelligence sensor chamber 3, and cable vault 4 is in the bottom of bus-bar room 2; Control room 5 is positioned at the top of intelligence sensor chamber 3.
In bus-bar room 2, be penetrated with copper bar bus 8, also have three insulators 13 that support copper bar bus 8, and three wall bushings that are triangularly arranged 14 are arranged; In control room 5, be provided with intelligent controller 11 and the automatic voltage conversion equipment that is used for the change detection signal.
Bus-bar room 2, intelligence sensor chamber 3 and cable vault 4 are provided with the pressure release top board separately, are respectively bus-bar room pressure release top board 21, cable vault's pressure release top board 20 and intelligence sensor chamber pressure release top board 22;
Lightning arrester 17 is set on the base plate of cable vault 4,, in the circuit running, is subjected to lightning impulse and forms the number of times that discharges counting automatically for circuit with the lightning arrester 17 supporting discharge counters 18 that are provided with.
Totally-enclosed insulation valve 10 is adopted in intelligence sensor chamber 3, according to the version of existing totally-enclosed insulation valve, comprises two be hinged collapsible totally-enclosed insulation valve 10, left and right sides track valve guide rail 23 and valve pushing mechanisms 24 are set.
Be connected in main circuit and pass through insulator 13 supports by the copper bar bus 8 that wall bushing 14 is introduced, be positioned in the bus-bar room 2 of cabinet 1, extend to then in the top of contact box 15, the bottom of contact box 15 is connected by lead or copper bar with lightning arrester 17, the connection of contact box 15 top and the bottom be by intelligence sensor handcart 6 move on the guide rail 7 reach the position of setting after, intelligence sensor handcart 6 promotes valve pushing mechanism 24 by external force, driving valve 10 by valve pushing mechanism 24 slides on valve guide rail 23 and progressively opens, intelligence sensor handcart 6 moves forward, the Mume flower contact 12 that is installed in intelligence sensor 19 front portions is positioned on the guide rail 7 fully with after the fixed contact 16 of contact box 15 inside fully contacts, and intelligence sensor handcart 6 is in the service position at this moment.
The intelligence sensor handcart 6 that is in the service position causes intelligence sensor 19 with the fixed contact 16 of power supply from copper bar bus 8 process contact boxs 15 inside, this moment, the intelligence sensor handcart 6 was finished two transformation tasks: one is that intelligence sensor 19 detected circuit parameters are transferred to the intelligent controller 11 that is installed in 5 of the control rooms by secondary plug-in unit 9, show by intelligent controller 11, monitor and protective circuit for the field operator; Another is by intelligence sensor handcart 6 lightning arrester 17 to be connected in the circuit, makes its lightning protection to circuit, overvoltage protection.
When extreme case appears in arbitrary functional compartments, such as arcing, internal pressure increase etc. take place,, thereby avoid causing big fault by rushing down pressure passageway and can back down the coping that rushes down that is positioned at each functional compartments top at any time separately, guarantee the safety of neighbouring device.
In intelligent controller 11, data such as being convenient to the communication interface of user to terminal transmission information, real-time Transmission circuit parameter can be set; Intelligent controller 11 also can be set simultaneously have the function that automatically switches on operation circuit and another circuit concurrently.