CN212114787U

CN212114787U - Distribution device construction transition arrangement structure capable of shortening power failure time of transformer

Info

Publication number: CN212114787U
Application number: CN202020948194.9U
Authority: CN
Inventors: 刘光华; 汪觉恒; 彭鹏志; 李凡; 李志海
Original assignee: China Energy Engineering Group Hunan Electric Power Design Institute Co Ltd
Current assignee: China Energy Engineering Group Hunan Electric Power Design Institute Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2020-12-08
Anticipated expiration: 2030-05-29

Abstract

The utility model provides a shorten distribution device construction transition arrangement structure of transformer power off time, distribution device's power supply route is in proper order: first overline (13), second jumper wire (14), second overline (18), first downlead (2), first isolator (5), current transformer (6), first circuit breaker (7), second isolator (8), second arrester (9), transformer (10), second arrester (9) are connected with transformer (10), the other end of first overline (13) is connected with electric wire netting circuit (1) through first jumper wire (11), first overline (13) and second overline (18) are used for single bus distribution device during construction to provide electric power for transformer (10). Utilize the utility model discloses, can shorten the blackout time of former transformer during the construction more than 75%, still solve the access problem of newly-increased transformer.

Description

Distribution device construction transition arrangement structure capable of shortening power failure time of transformer

Technical Field

The utility model relates to a distribution device's arrangement structure, concretely relates to shorten transformer power off time's distribution device construction transition arrangement structure.

Background

In the past, due to the shortage of electric power and the short supply and demand, high-energy-consumption enterprises such as metal smelting and the like have to build power plants to solve the problem of equipment operation power supply. In recent years, with the reduction of the cost of wind power and photovoltaic power generation, a large amount of new energy power is connected into a power grid, and a large-power-consumption enterprise starts to reduce the self-generating capacity and preferentially adopts the power grid power. From the transformation project of a booster station of a certain metal smelting enterprise in Lanzhou currently implemented, 3 300MW thermal power generating sets are built by owners originally and serve as self-contained power sources of enterprises, and the cost of electricity purchasing by adopting a power grid is about 0.1 yuan/kWh lower than that of self-generated electricity due to the construction of large-scale wind power and photovoltaic power generation in Gansu province. However, the use of the existing power distribution device has the following problems: 1) the newly expanded transformer cannot be accessed; 2) during the transformation of the original power distribution device, the original transformer is powered off for a long time.

For the unit extension project of the thermal power plant, the access problem of the newly added starting/standby transformer also exists under the condition that the line-transformer bank wiring is adopted for the starting/standby transformer in the previous period.

Disclosure of Invention

The utility model aims to solve the technical problem that a distribution device construction transition arrangement structure that can shorten transformer power off time, be convenient for newly-increased transformer is provided.

The utility model provides a technical scheme that its technical problem adopted is, a distribution device construction transition arrangement structure who shortens transformer power off time, distribution device's arrangement structure is: first overline, second jumper, second overline, first downlead, first isolator, current transformer, first circuit breaker, second isolator, second arrester connect gradually, the second arrester is connected with the transformer, the other end of first overline is connected with the electric wire netting line through first jumper, first overline and second overline are used for single bus distribution device construction period to provide electric power for the transformer.

Furthermore, the circuit is erected on a new outgoing line portal frame.

Furthermore, the first jumper and the second jumper are respectively connected with a new outgoing line portal frame and an existing outgoing line portal frame through a middle jumper framework.

The utility model is improved on the basis of the existing distribution device, the distribution device of the transformer substation is transformed from the original line-transformer set wiring into single bus wiring, and the power failure time of the original transformer during construction is shortened by setting overline; the mode of single bus wiring is convenient for the access of newly-increased transformer.

Drawings

FIG. 1 is a schematic cross-sectional view of a conventional power distribution apparatus;

fig. 2 is a schematic cross-sectional view of an embodiment of the present invention;

fig. 3 is a schematic cross-sectional view of the embodiment of fig. 1 after being modified to a single bus bar connection.

In the figure: 0-existing outgoing line gantry; 1-a power grid line; 2-a first down conductor; 3-a first arrester; 4-a voltage transformer; 5-a first isolating switch; 6-current transformer; 7-a first circuit breaker; 8-a second isolation switch; 9-a second lightning arrester; 10-a transformer; 11 — a first jumper; 12-new outlet portal frame; 13 — a first flying lead; 14-a second jumper; 15-middle jumper frame; 16-single bus frame; 17-single bus; 18-a second flying lead; 21-a second down conductor; 22-a third isolator switch; 23-a current transformer; 24 — a second circuit breaker; 25-a fourth isolator switch; 26-post insulator; 27-upper jumper.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Referring to the attached drawing 2, the construction transition arrangement structure of the power distribution device in the embodiment is that a first span line 13, a second jumper line 14, a second span line 18, a first down lead 2, a first isolating switch 5, a current transformer 6, a first breaker 7, a second isolating switch 8 and a second arrester 9 are sequentially connected, the second arrester 9 is connected with a transformer 10, the other end of the first span line 13 is connected with a power grid line 1 through a first jumper line 11, and the first span line 13 and the second span line 18 are used for providing power for the transformer 10 during the construction of the power distribution device.

The circuit 1 is erected on a new outgoing line portal frame 12; the first jumper 13 and the second jumper 18 are respectively connected with the new outgoing line portal frame 12 and the existing outgoing line portal frame 0 through the middle jumper framework 15.

Referring to fig. 3, after the power distribution device construction transition arrangement structure of the present embodiment is transformed into a single bus connection, the arrangement structure of the power supply device is as follows: the second downlead 21, the third isolator 22, the current transformer 23, the second breaker 24, the fourth isolator 25, the single busbar 17 connect gradually, make the single busbar 17 electrified, connect gradually through the single busbar 17, go up the jumper 27, the second overline 18, the first downlead 2, the second isolator 5, the current transformer 6, the first breaker 7, the second isolator 8, the second arrester 9 again, the second arrester 9 is connected with the transformer 10, the other end and the electric wire netting circuit 1 of the second downlead 21 are connected.

The implementation process of the embodiment:

(1) the method comprises the steps of powering off a power grid line 1 (see attached figure 1), then carrying out line migration and modification, creating a new outgoing portal frame 12, an intermediate jumper wire framework 15 and a single bus framework 16 for the reconstruction of a power distribution device, installing a first jumper wire 13, a second jumper wire 18, a first jumper wire 11 and a second jumper wire 14, recovering a first down lead 2, and installing a single bus 17 (see attached figure 2);

(2) the power transmission to the power grid line 1 is recovered, and the power supply to the transformer 10 can be recovered along the power grid line 1, the first jumper 11, the first jumper 13, the second jumper 14, the second jumper 18, the first down lead 2, the first isolating switch 5, the current transformer 6, the first circuit breaker 7, the second isolating switch 8, the second lightning arrester 9 and the transformer 10;

(3) the installation of each device (including a third isolating switch 22, a current transformer 23, a second circuit breaker 24, a fourth isolating switch 25, a post insulator 26 and the like) in a newly-added line interval, a transformer interval and a bus device interval of the power distribution device;

(4) stopping the power grid line 1 again, moving the first lightning arrester 3 and the voltage transformer 4 in the figure 1 to the outer side of the newly outgoing portal frame 12, removing the first jumper wire 13, the first jumper wire 11 and the second jumper wire 14 in the figure 2, and installing the upper jumper wire 27 and the second down lead 21;

(5) distribution device allies oneself with transfers, resumes to supply power to grid line 1 (see attached figure 3), can realize: the single bus 17 is electrified along the power grid line 1, the second down lead 21, the third isolating switch 22, the current transformer 23, the second breaker 24, the fourth isolating switch 25 and the single bus 17, and the electrified single bus 17 recovers the power supply to the transformer 10 along the upper jumper 27, the second overline 18, the first down lead 2, the first isolating switch 5, the current transformer 6, the first breaker 7, the second isolating switch 8, the second lightning arrester 9 and the transformer 10.

In this embodiment, the design is based on a 330kV voltage class, and for the class of 220kV and below, because the distance from the new outgoing gantry 12 to the existing outgoing gantry 0 is small, the intermediate jumper framework 15 can be eliminated, and the first jumper 13 and the second jumper 18 are merged into the jumper 18 (the second jumper 14 is also correspondingly eliminated).

In the embodiment, the original line-transformer bank wiring of the substation power distribution device is changed into single bus wiring, and the first jumper 13 and the second jumper 18 are arranged, so that the power failure time of the transformer 10 in the construction period is shortened (the power failure time is shortened by 75% by adding one transformer, the number of the expanded transformers is more, and the power failure time is shortened more); the connection mode of single bus wiring has solved the access problem of newly-increased transformer.

Various modifications and variations of the present invention may be made by those skilled in the art, and they are still within the scope of the present invention, provided they are within the scope of the claims and their equivalents.

What is not described in detail in the specification is prior art that is well known to those skilled in the art.

Claims

1. The utility model provides a distribution device construction transition arrangement structure who shortens transformer blackout time which characterized in that: the arrangement structure of the power distribution device is as follows: first overline (13), second jumper wire (14), second overline (18), first downlead (2), first isolator (5), current transformer (6), first circuit breaker (7), second isolator (8), second arrester (9) connect gradually, second arrester (9) are connected with transformer (10), the other end of first overline (13) is connected with electric wire netting circuit (1) through first jumper wire (11), first overline (13) and second overline (18) are used for during the distribution device construction to provide electric power for transformer (10).

2. The power distribution device construction transition arrangement structure for shortening the power failure time of a transformer according to claim 1, characterized in that: the line (1) is erected on a new outgoing line portal frame (12).

3. The power distribution device construction transition arrangement structure for shortening the power failure time of the transformer according to claim 1 or 2, characterized in that: the first jumper (13) and the second jumper (18) are respectively connected with a new outgoing line portal frame (12) and an existing outgoing line portal frame (0) through a middle jumper framework (15).