CN222016121U

CN222016121U - Outdoor high-voltage 35kV cable tapping box

Info

Publication number: CN222016121U
Application number: CN202323397175.4U
Authority: CN
Inventors: 杨旭忠; 何树斌; 陆涛
Original assignee: YUNNAN YUNKAI ELECTRIC CO Ltd
Current assignee: YUNNAN YUNKAI ELECTRIC CO Ltd
Priority date: 2023-12-13
Filing date: 2023-12-13
Publication date: 2024-11-15
Anticipated expiration: 2033-12-13

Abstract

The utility model discloses an outdoor high-voltage 35kV cable tapping box which mainly comprises a box body, a disconnecting switch compartment, an outgoing line compartment, a disconnecting switch, a 35kV branch outgoing line cable, a 35kV post insulator, a 35kV branch lightning arrester and a 35kV high-voltage sensor, wherein the outdoor high-voltage 35kV cable tapping box is a switching device which takes the disconnecting switch GN45 as a main switch, has an independent compartment and obvious visible fracture, adopts air insulation, and performs tapping, switching and converging on a cable line. The utility model has compact structure, good tightness, high protection level, strong corrosion resistance, clear cable arrangement, convenient overhaul and maintenance, flexible operation and reliable interlocking, can separate the power supply cable branch with faults or needing overhaul from the electrified system as soon as possible, prevents accident diffusion, can effectively reduce complicated links between power transmission and distribution and terminal load in use, and saves resource cost.

Description

Outdoor high-voltage 35kV cable tapping box

Technical Field

The utility model relates to an outdoor power distribution project, in particular to an outdoor high-voltage 35kV cable tapping box.

Background

In the process of new energy development, western wind power and solar energy resources are rich, but in remote mountain areas, the line erection is large in investment and difficult to construct; in the rural power grid reconstruction process, natural villages are scattered in residence, the span between villages is large, the supply according to the areas is difficult to realize in the power supply process, and the small-range centralized power supply cost is too high; and the urban and rural junction small-load overhead line has a plurality of problems of multiple nodes, overload operation of partial lines, line crossing and the like.

The outdoor high-voltage 35kV cable tapping box has the advantages of economy, reliability, simplicity in operation, convenience in maintenance, flexible and various combination modes, good insulating property and the like, and is widely popularized and used in a 10 kV-35 kV power system. The application of the outdoor high-voltage 35kV cable tapping box effectively solves various problems in the power generation and distribution engineering and the processes of new construction, reconstruction, extension and capacity expansion.

Disclosure of utility model

Aiming at the defects in the prior art, the utility model provides an outdoor high-voltage 35kV cable tapping box which is economical, reliable, convenient to maintain and flexible and various in combination mode, and is a switching device which takes a disconnecting switch GN45 as a main switch, has independent compartments and obvious visible fracture, adopts air insulation, and performs tapping, switching and converging current collection circuits on a cable line.

The technical scheme adopted by the utility model is as follows: the utility model provides an outdoor high voltage 35kV cable tapping box, includes box, isolator compartment, compartment of being qualified for the next round of competitions, isolator, 35kV branch outgoing line cable, 35kV pillar insulator, 35kV branch arrester, 35kV high voltage sensor and baffle, install the baffle in the middle of the box, divide into isolator compartment and compartment of being qualified for the next round of competitions with the box, install isolator and 35kV high voltage sensor in the isolator compartment, install 35kV pillar insulator, 35kV branch arrester and 35kV branch outgoing line cable in the compartment of being qualified for the next round of competitions. Through the structure, the cable tapping box is provided with independent compartments, obvious visible fractures, and tapping, switching and converging can be implemented on a cable line by adopting air insulation.

Further, a plurality of partition boards are arranged in the box body to divide the box body into a plurality of isolating switch compartments and outlet compartments.

The utility model has the main advantages that: the device is economical, reliable, convenient to maintain and flexible and various in combination mode. The outdoor high-voltage 35kV cable tapping-off box solves various problems in the processes of power generation, power distribution engineering, new construction, reconstruction, extension and capacity expansion.

Drawings

Fig. 1 is a schematic diagram of the structure of the present utility model.

Fig. 2 is an external schematic view of the present utility model.

Fig. 3 is a schematic cross-sectional view of the present utility model.

Fig. 4 is a schematic view of two branching compartments of the present utility model.

Fig. 5 is a schematic view of three two branching compartments of the present utility model.

Fig. 6 is a schematic view of four branching compartments of the present utility model.

Fig. 7 is a schematic view of a drop cable of the present utility model.

FIG. 8 is a schematic illustration of a wind farm tapping box arrangement of the present utility model.

Fig. 9 is a main loop wiring scheme of the present utility model.

The marks in the figure are as follows: 1-box, 2-isolator compartment, 3-compartment of being qualified for next round of competitions, 4-isolator, 5-35kV branch cable, 6-35kV pillar insulator, 7-35kV branch arrester, 8-35kV high voltage sensor, 9-baffle, 10-35kV large-traffic direct-burried insulated cable, 11-5kV transmission and distribution line cable, 12-35kV-10kV transformer cable, 13-station are with becoming power cable in a small range.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-9, the box body 1, the isolating switch compartment 2, the outgoing line compartment 3, the isolating switch 4, the 35kV branch outgoing line cable 5, the 35kV post insulator 6, the 35kV branch lightning arrester 7, the 35kV high-voltage sensor 8 and the partition plate 9 are specifically formed. Firstly, the box body 1 is assembled, the partition plate 9 is installed in the middle of the box body 1, the isolating switch 4 and the 35kV high-voltage sensor 8 are installed in the isolating switch compartment 2, and then the components such as the 35kV post insulator 6, the 35kV branch lightning arrester 7, the 35kV branch outgoing cable 5 and the like are installed in the outgoing compartment 3, so that the installation is completed. The isolating switch 4 is provided with a grounding switch and is arranged on the partition plate 9, one end of the isolating switch is connected with an incoming line, the other end of the incoming line is connected with a 35kV branch outgoing line cable 5, the incoming line is a 35kV high-flow direct-buried insulating cable 10 which is connected with a 35kV high-voltage sensor 8, the 35kV high-voltage sensor 8 is externally connected with a live display device, and the 35kV branch outgoing line cable 5 comprises a 35kV power transmission and distribution line cable 11, a 35kV-10kV transformer cable 12 and a station transformer and small-range power supply cable 13; a 35kV post insulator 6 is connected between the 35kV branch outgoing cable 5 and the box body 1, and a 35kV branch lightning arrester 7 is connected between the 35kV branch outgoing cable 5 and the partition plate 9;

Corresponding tapping branches can be added according to actual needs, and independent compartments are arranged between the branches for separation. See fig. 4-6.

When the cable is tapped, the distance of a distribution electric line is longer, a main large cable is usually selected for outgoing when outgoing, and then when the load is close to the load, the outdoor high-voltage 35kV cable tapping box is used for branching the main cable, so that the main cable is divided into a plurality of small-area cables, and the small-area cables are connected into lower electric equipment, as shown in fig. 7.

When the cable is switched, the intermediate links of the transmission process are reduced, the voltage drop is reduced, the loss is reduced, meanwhile, the accident control analysis can be convenient, the wiring mode is flexible and changeable, and the method is suitable for various occasions. See fig. 9.

When cables are converged, because the number of installed fans of the wind power plant is more, and 2000kW wind power generator sets are taken as an example, in order to reduce the number of cable loops from the fan sets to the 110kV booster station, the fan sets are converged into an outdoor high-voltage 35kV cable tapping box, a 0.69kV direct-change 35kV transformer is arranged between the fan and the tapping box, then wind power generation is uniformly led out from the cable tapping box to the transformer sets, the wiring mode is a one-machine-to-one-unit wiring mode, the box-type high-voltage sides in each set adopt a parallel connection mode, and the 35kV line cables of a plurality of loops are converged and are uniformly connected onto a 35kV bus of the 110kV booster station, so that the convergence of current collecting lines is realized. See fig. 8.

By adopting the structure, complicated links between power transmission and distribution and terminal load can be effectively reduced, and the resource cost is saved. The power supply cable branch with faults or to be overhauled can be separated from the electrified system as soon as possible, so that accident diffusion is prevented.

The specific embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.

Claims

1. Outdoor high voltage 35kV cable tapping-off box, including box (1), isolator compartment (2), compartment of being qualified for the next round of competitions (3), isolator (4), 35kV branch outgoing cable (5), 35kV pillar insulator (6), 35kV branch arrester (7), 35kV high voltage sensor (8) and baffle (9), its characterized in that: the novel high-voltage power supply box is characterized in that a partition plate (9) is arranged in the middle of the box body (1), the box body (1) is divided into a disconnecting switch compartment (2) and an outgoing line compartment (3), a disconnecting switch (4) and a 35kV high-voltage sensor (8) are arranged in the disconnecting switch compartment (2), and a 35kV post insulator (6), a 35kV branch lightning arrester (7) and a 35kV branch outgoing line cable (5) are arranged in the outgoing line compartment (3).

2. An outdoor high voltage 35kV cable tapping box according to claim 1, characterized in that a number of separators (9) are mounted in the box (1), dividing the box (1) into a number of disconnector compartments (2) and outlet compartments (3).