CN106356724A - Bus Stereo Arrangement Structure of Double Bus and Double Segment Power Distribution Device - Google Patents

Abstract

The invention relates to a bus three-dimensional arrangement structure of a double-bus double-subsection power distribution device, which comprises at least two homonymous loops provided with a GIS power distribution device, and also comprises an upper-layer bus and a lower-layer bus which are connected in parallel in four rows through a subsection device, wherein an upper-layer outgoing line loop of the homonymous loop is arranged on the upper-layer bus, a lower-layer outgoing line loop of the homonymous loop is arranged on the lower-layer bus, and the upper/lower-layer outgoing line loops of the homonymous loops are positioned on the same section of the upper/lower-layer. The bus three-dimensional arrangement structure of the double-bus double-subsection power distribution device can enable the overhead lines, the power supply and the load circuit with the same name to be reasonably distributed in different sections, the lines do not cross and cross each other, the power supply safety and reliability are greatly improved, the maintenance and the construction of extension projects are convenient, the buses in different sections are arranged in an upper layer mode and a lower layer mode, the occupied area is saved by half, and the investment cost is greatly reduced.

Description

Bus Stereo Arrangement Structure of Double Bus and Double Segment Power Distribution Device

technical field

The invention relates to the arrangement structure of the same-named overhead outgoing line circuit in the GIS high-voltage power distribution device, in particular to the three-dimensional arrangement structure of the busbars of the double-busbar double-section power distribution device.

Background technique

In the high-voltage power distribution device, the gas-insulated fully enclosed power distribution device (GIS) has the advantages of small footprint, high safety and reliability, and small maintenance workload compared with the conventional air-insulated power distribution device (AIS). Advantages, gradually being widely used.

For the GIS high-voltage power distribution device with double busbars, double sections, and single rows, in order to avoid overhead lines crossing, it is necessary to arrange the same-named circuits of power supply and load on the same section of the busbar. At the same time, the power failure reduces the reliability of power supply.

As shown in Figure 1 is the wiring schematic diagram of the existing GIS power distribution device. The wiring form is double busbars and double segments. Section double busbars 3M, 4M and right section double busbars 1M, 2M, and the left and right sections are connected by section device 6. The main transformer connection device 7 and the busbar equipment 8 are respectively connected to the left and right sections of double busbars. Among them, two circuits 1 and 2 with the same name are connected to the double busbars 3M and 4M in the left section. The circuit 1 with the same name includes circuit 1A and circuit 1B with the same name circuit 1 equipped with GIS power distribution device, and the circuit 2 with the same name also includes the circuit with the same name as GIS power distribution The circuit 2A and circuit 2B with the same name of the device, the double busbars 1M and 2M of the right section are set in the same way as the double busbars 3M and 4M of the left section, and will not be repeated here.

The layout of the lines on the double busbars 3M and 4M in the left section will now be described in detail. The two outlet circuits 1A and 1B of the circuit 1 with the same name are arranged adjacently, and the two outlet circuits 2A and 2B of the circuit 2 with the same name are also arranged adjacently. Although this arrangement can meet the general power supply reliability requirements, it still has the disadvantages of reducing power supply reliability in special cases: (1) When the high-voltage power distribution device has an uneven power supply and load distribution, such as bus 1M, 2M All of them are loads, and the busbars 3M and 4M are all power supplies, so the operation mode of the busbars is extremely inflexible; (2) Since the circuit with the same name is installed on the same double busbar, as shown in Figure 1, the two outlet circuits 1A and 1A of the same-named circuit 1 1B is connected to the double busbars 3M and 4M in the left section. When the busbars in the same section fail or are overhauled or a new circuit is expanded at intervals, the two outgoing circuits of the same name circuit must be powered off at the same time, which reduces the reliability of the system power supply. The reason for the above problems is that if the two outlet circuits of the circuit with the same name are to be installed on two different busbars, for example, the outlet circuit 1A is connected to the left double busbars 3M and 4M, and the other outlet circuit 1B is connected to On the double busbars 1M and 2M in the right section, there will inevitably be overhead lines crossing and crossing, which will cause construction difficulties and bring safety hazards to operation, and increase project investment.

Contents of the invention

The invention provides a three-dimensional layout structure of the busbars of the double-busbar double-section power distribution device, so that the overhead lines with the same name, the power supply and the load circuit can be reasonably distributed in different sections, and the lines can not cross each other, which is convenient for maintenance and expansion projects construction.

The bus three-dimensional layout structure of the double-bus double-section power distribution device of the present invention includes at least two circuits with the same name provided with the GIS power distribution device, and also has an upper-layer bus and a lower-layer bus connected in four parallel rows through the segment device. There is an upper layer outlet circuit with the same name circuit, and a lower layer outlet circuit with the same name circuit on the lower layer bus, and the upper/lower layer outlet circuits of the same name circuits are located on the same section of the upper/lower layer bus. Through the above layout structure, not only can the overhead lines with the same name, power supply and load circuits be reasonably distributed in different sections, so that the lines do not cross each other, which complies with industry regulations, thus greatly improving the safety and reliability of power supply, and Through the busbars arranged on the upper and lower floors, the occupied area is reduced by half, the investment cost is greatly reduced, and it is also convenient for the construction of maintenance and expansion projects.

One of the specific layout structures is that the lower outgoing line circuit set on the lower bus is the supporting structure of the upper bus as the lower outgoing line structure, and the lower outgoing line circuit is connected with the lower outgoing line of the lower outgoing line structure; the upper outgoing line circuit set on the upper bus is The frame structure column is an upper outgoing line structure, and the upper outgoing line loop is connected with the upper outgoing line of the upper outgoing line structure. In this way, the fixed frame of the upper/lower bus bar itself can be utilized to the greatest extent for outgoing line connection, without setting additional or separate outgoing line structures.

Further, in order to prevent lightning intrusion wave overvoltage, one of the upper outlet circuit and the lower outlet circuit is provided with a lightning protection device, preferably both the upper outlet circuit and the lower outlet circuit are equipped with a lightning arrester, such as an AIS arrester, which can fully protect the equipment Safety. According to different needs, the lightning protection device can also be set in the GIS.

The three-dimensional layout structure of the busbars of the double-busbar double-section power distribution device of the present invention can reasonably distribute the same-named overhead lines, power supply and load circuits in different sections, and the lines do not cross each other, so that the safety and reliability of power supply are greatly improved. The increase in width facilitates the construction of maintenance and expansion projects, and the layout of the upper and lower floors of the busbars of different sections saves the occupied area by half and greatly reduces the investment cost.

The above-mentioned content of the present invention will be further described in detail below in conjunction with the specific implementation manners of the examples. However, this should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following examples. Without departing from the above-mentioned technical idea of the present invention, various replacements or changes made according to common technical knowledge and customary means in this field shall be included in the scope of the present invention.

Description of drawings

FIG. 1 is a schematic diagram of the busbar structure of an existing double-busbar double-section power distribution device.

Fig. 2 is a schematic diagram of the three-dimensional arrangement structure of the busbars of the double-busbar double-section power distribution device of the present invention.

FIG. 3 is a schematic diagram of the three-dimensional arrangement in FIG. 2 .

detailed description

As shown in Figure 2, the three-dimensional layout structure of the busbars of the double-busbar double-section power distribution device of the present invention includes at least two circuits 1 and 2 with the same name provided with the GIS power distribution device, and also has parallel four-column connections through the sectional device 6 The upper busbars 3M, 4M and the lower busbars 1M, 2M. Bus devices 8 are provided on the upper busbars 3M, 4M and lower busbars 1M, 2M, and main transformer connection devices 7 are arranged on the upper busbars 3M, 4M. The upper-layer busbars 3M and 4M are equipped with the upper-layer outlet circuits 1A and 2A of the same-named circuits 1 and 2, and the lower-layer busbars 1M and 2M are equipped with the lower-layer outlet circuits 1B and 2B of the same-named circuits 1 and 2, and the same-named circuits 1 and 2 are respectively The upper/lower layer outlet circuit is located on the same section of the upper/lower layer busbar.

As shown in Figure 2, in order to make full use of the structure of the busbar itself, the lower-level outlet circuits (only the first lower-level outlet circuit 1B is shown in the figure) set on the lower-level busbars 1M and 2M are the supports for the upper-level busbars 3M and 4M. The structure is the lower outlet structure, and the outlet circuits of each layer (only the first lower outlet circuit 1B is shown in the figure) are connected with the lower outlet 9 of the lower outlet structure; Only the first upper outlet circuit 1A is shown) is based on the frame structure column as the upper outlet structure, and each upper outlet circuit (only the first upper outlet circuit 1A is shown in the figure) is connected to the upper outlet 10 of the upper outlet structure. At the same time, in order to prevent lightning intrusion and wave overvoltage, lightning protection devices 11 in the form of AIS arresters are provided in each upper layer outlet circuit and each lower layer outlet circuit.

Claims (4)

1. the bus solid arrangement of the double segmentation power distribution equipment of double-bus, is provided with gis power distribution equipment including at least two Loop (1,2) of the same name, it is characterized by: be there is the upper strata bus (3m, 4m) being connected by parallel four row of sectioning (6) and lower floor Bus (1m, 2m), upper strata bus (3m, 4m) is provided with the upper strata transmission line circuit (1a, 2a) in loop of the same name (1,2), lower floor's bus (1m, 2m) is provided with lower floor's transmission line circuit (1b, 2b) in loop of the same name (1,2), and loop of the same name (1,2) respective up/down layer Transmission line circuit is located on the same section of up/down layer bus.

2. the bus solid arrangement of the double segmentation power distribution equipment of double-bus as claimed in claim 1, it is characterized by: lower floor is female Line (1m, 2m) goes up the lower floor's transmission line circuit (1b, 2b) arranging with the supporting structure of upper strata bus (3m, 4m) for lower outlet framework, And lower floor's transmission line circuit (1b, 2b) is connected with the lower outlet (9) of lower outlet framework；

Upper strata bus (3m, 4m) goes up the upper strata transmission line circuit (1a, 2a) of setting with frame structure post for upper outlet framework, and on Layer transmission line circuit (1a, 2a) is connected with the upper outlet (10) of upper outlet framework.

3. the bus solid arrangement of the double segmentation power distribution equipment of double-bus as claimed in claim 1 or 2, it is characterized by: on One of layer transmission line circuit (1a, 2a) and lower floor's transmission line circuit (1b, 2b) are provided with lightning arrester (11).

4. the bus solid arrangement of the double segmentation power distribution equipment of double-bus as claimed in claim 3, it is characterized by: upper strata goes out Line loop (1a, 2a) and lower floor's transmission line circuit (1b, 2b) are equipped with lightning arrester (11).