CH685962A5 - Method for construction of a station inside a high voltage isolation dan air and obtained post - Google Patents

Description

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CH 685 962 A5

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Description

The present invention relates to the technical field of the production of works generally called stations, adapted to provide transformation and / or interconnection functions for high voltages, or even very high voltages, in particular greater than or equal to 60 K volts.

The invention relates more precisely to the construction of a high voltage indoor station with air isolation.

The state of the art has essentially proposed three types of design of high voltage substations.

The first type concerns outdoor stations whose constituent equipment and their connections are placed in the open air on the site. The construction times of these outdoor stations are dependent on the climatic conditions to which the various equipment of the substation is directly subjected. Furthermore, such stations have a large footprint and constitute works particularly unsightly for the environment.

Another known type of substation relates to shielded substations constituted by metal enclosures, inside which a pressurized fluid ensures the isolation of the live parts. Such stations, which make it possible to obtain a footprint much smaller than that of the external stations, also ensure total protection of their constituent equipment. However, these shielded stations are only suitable for specific applications, because of their very high production cost.

The prior art has proposed a third type of post, in particular by patent FR-2,566,199 (84-09,362), of the internal type tending to reconcile the advantages of external posts and armored posts, while eliminating their drawbacks. This type of post is made up of a compartmentalized building ensuring the protection of the equipment against damage from bad weather. The insulation is provided naturally by the air prevailing at atmospheric pressure. Although this type of post allows a reduction in their footprint, disadvantages remain due to the work or interventions to be carried out on the site which are numerous and always dependent on weather conditions. Thus, known indoor stations have the distinction of having significant lead times, as well as a relatively high cost of completion.

The present invention aims to remedy the drawbacks stated above by proposing a new technique for constructing a high-voltage indoor station with air isolation, adapted to minimize intervention work to be carried out on site for the completion of the position.

Another object of the invention is to propose a method of constructing an indoor station, designed to reduce intervention times on the site and to overcome climatic conditions, so as to reduce the cost of producing such works.

To achieve the above aims, the method of the invention, for constructing an indoor high-voltage air-insulated substation, of the type comprising a series of cells composed of high-voltage equipment consists, for each cell:

- create a transportable self-supporting chassis,

- carry out, before transporting the chassis to a site, mounting the equipment provided on the chassis, connecting them electrically and testing the equipment installed,

- transport the pre-equipped chassis to the substation construction site,

- position the chassis on a specific area of the site,

- and build a protective building around the positioned frames.

Various other characteristics will emerge from the description given below with reference to the appended drawings which show, by way of nonlimiting examples, embodiments of the subject of the invention.

Fig. 1 is a schematic perspective view showing a pre-equipped chassis, suitable for constituting a high-voltage substation.

Fig. 2 is a plan view of an exemplary embodiment of a high voltage substation constructed according to the method according to the invention.

Fig. 3 is a cross-sectional view taken substantially along lines III-III of FIG. 2.

Fig. 4 is a view similar to FIG. 1 showing another type of pre-equipped chassis.

Fig. 5 is a view similar to FIG. 3 showing another embodiment of a chassis according to the invention.

Figs. 1 to 3 illustrate the process according to the invention, for building an indoor station 1 with high voltage insulation in the air. In a conventional manner, the station 1 notably comprises a series of cells 2i, 2z, 23 ... 2n each composed of specific high voltage equipment 3 adapted to assume the functions of interconnection, coupling and / or protection .

According to the invention, for each cell 2i, 22, 23 ... 2n, provision is made to produce a frame, a superstructure or, in general, a chassis 4i, 42, Az-An having as characteristics of be self-supporting and transportable. Each chassis comprises, at its base, a rigid frame 40, preferably in the form of a parallelogram. The rigid frame 40 supports structural elements 41 rising from the frame to form a frame having a shape which can be assimilated to a parallelepiped, as is clear from the drawings. The structural elements 41 are formed of posts, uprights, sleepers and / or partitions, agencies suitably for receiving and supporting the various high voltage equipment 3. The structural elements 41 can be made of various materials, such as steel, aluminum or concrete.

As shown more precisely in FIG. 1, the structural elements 41 are arranged

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so as to receive specific high voltage equipment 3 to form, for example, a high voltage supply supply cell 2i. To this end, the corresponding chassis 4i is intended to support measuring transformers 30 capable of being connected to an overhead line or, as illustrated in dashed lines, to underground cables 31. The chassis 41 also supports line disconnectors 32 , disconnectors 33, circuit breakers 34 and bars 35 which form a set, extending in a direction a substantially perpendicular to the longitudinal axis & of the chassis.

Advantageously, before the transport of such a chassis on the site where the station 1 is to be built, electrical connections are made between the various pieces of equipment 3. To this end, links 36 are mounted to connect the measurement transformers 30 to the line disconnectors 32 and for connecting the bars 35 to the circuit breakers 34 via the disconnectors 33. After such an electrical connection, the various pieces of equipment 3 are tested to verify their correct operation.

It must be considered that all the steps described above, namely the construction of the chassis, the assembly of the various equipment 3, the installation of the connections and the testing of the equipment, are advantageously carried out in the factory. The realization in the factory of a cell constituted by a pre-equipped chassis makes it possible to reduce, even to eliminate, the various interventions or works having to be carried out on the site, so as to be freed from climatic vagaries. For example, such a pre-equipped chassis has a length of the order of 5 to 17 meters, a width of the order of 2.5 to 3 meters and a weight of the order of 5 to 10 tonnes depending on the configuration of the station to be built. The dimensions of this chassis allow it to be transported by any appropriate means, in particular by road or rail.

The pre-equipped chassis 4i, as shown in FIG. 1, is intended to be transported to the site of construction of the post. The chassis 4i is positioned on a support 7, such as the ground, a slab or a lon-grine, arranged on the site area and on which the rigid frame 40 of the chassis comes to rest (fig. 3).

Of course, it should be noted that a high-voltage substation generally comprises a series of cells each providing a specific function. According to the invention, each cell 2i, 22, 23-.2n consists of a corresponding chassis 4i, 42, 43 ... 4n formed according to the method described above and supporting appropriate high voltage equipment. As an example, fig. 4 illustrates a high voltage power supply starting cell 22 constituted by a chassis 42 supporting a set of bars 35 connected to bulkhead crossings 38, via the disconnectors 33 and the circuit breakers 34.

Provision may also be made for other chassis corresponding to cells providing various functions. Thus, as it appears in fig. 5, the frame 4'3 constitutes a start and end cell 2'3 comprising at least one and, in the example illustrated, two sets of bars 35 superimposed. Likewise, it can be envisaged to constitute frames to form a coupling cell or a sectioning cell for bars, the constituent equipment of which is well known to those skilled in the art. In this regard, it should be noted that the arrangement of the various pieces of equipment 3 for constituting these various cells 2i, 22, 23, ... 2n has not been described in more detail, because it is well known in the prior art and respects, preferably, the provisions of the Electricity of France posts of the masonry type. In all cases, the chassis making up the cells are pre-equipped before being transported to the construction site of the high-voltage substation.

All these pre-equipped chassis are positioned in their final location by any appropriate means of handling. In the example illustrated, the chassis 4i and 42, corresponding respectively to an inlet cell 2i and to a feeder start cell 22, extend along their longitudinal axis {2, substantially parallel to one another. It should be noted that the bars 35 of the two chassis are placed side by side and extend substantially in a direction perpendicular to the longitudinal axes k of the chassis.

Around the chassis 4i, 42, 43 - .. 4n is constructed a protective building 9 independent of the chassis which alone assume the support function of the various high voltage equipment 3. Building

9 can be attached to or distant from the chassis. In addition, building 9 is designed to include the easements conventionally assigned to this type of position and to respect the minimum electrical distances to earth. It should be noted that such a building may be erected after the installation of the different frames or be arranged so as to allow the mounting or introduction of the frames inside the partially constructed building.

The method according to the invention for building an indoor station makes it possible to reduce intervention times on the site and to overcome climatic vagaries, by planning to mount all high voltage equipment in a factory on a transportable chassis. As shown more precisely in fig. 1, it can also be provided to mount on the chassis, before its transport, devices

10 low voltage with their low voltage connections to various equipment 3. These devices which are known to those skilled in the art manage the equipment of the cell. Preferably, these pieces of equipment 10 are positioned below the busbar and are assembled and tested in the factory before transporting the chassis.

The invention is not limited to the examples described and shown, since various modifications can be made thereto without departing from its scope.

Claims (1)

Claims 1. Method of constructing an indoor station (1) with high voltage air isolation, of the type comprising a series of cells (2i, 22, 23, ... 2n) composed of high voltage equipment ( 3), characterized in that it consists for each cell (2i, 22, 23, .... 2n) in: - create a transportable self-supporting chassis, 5 10 15 20 25 30 35 40 45 50 55 60 65 3 5 CH 685 962 A5 - carry out, before transporting the chassis to a site, mounting the equipment provided on the chassis, connecting them electrically and testing the equipment installed, - transport the pre-equipped chassis to the substation construction site, - position the chassis on a specific area of the site, - and build around the positioned frames, a protective building (9). 2. Method according to claim 1, characterized in that it consists in producing a self-supporting frame composed of a rigid support frame (40) surmounted by structural elements (41), adapted to support the equipment (3). 3. Method according to claims 1 and 2, characterized in that it consists in positioning the frame (40) of the chassis on a support (7) arranged in the area of the site to receive the chassis. 4. Method according to claim 1, characterized in that it consists, for some of the cells, to proceed, before transporting the chassis to the site, to mounting on the chassis of low-voltage devices (10) ensuring the management cell equipment. 5. Method according to claim 1, characterized in that it consists, for some of the cells, to proceed, before transporting the chassis to the site, to mounting on the chassis of the high voltage equipment (3) comprising at least one busbar (35) extending in a direction (a) substantially perpendicular to the longitudinal axis (Ì2) of the chassis. 6. Method according to claims 4 and 5, characterized in that it consists, for some of the cells, in mounting the low voltage devices (10) on the chassis, below a busbar. 7. Method according to claim 5, characterized in that it consists, for some of the cells, to proceed, before transporting the chassis to the site, to mounting on the chassis of the equipment (3) to produce a starting cell { 2z) and / or high voltage power supply (2i) or a coupling or sectioning cell. 8. Method according to claims 3 and 7, characterized in that it consists in positioning on the support (7) the chassis constituting a starting cell (22) and the chassis constituting an arrival cell (2i ), so that the longitudinal axes (k) of the chassis extend substantially in parallel directions, while the busbars (35) of the two cells are placed side by side. 9. Method according to claim 5, characterized in that it consists, for some of the cells, in proceeding, before transporting the chassis to the site, in mounting on the chassis equipment comprising at least two superimposed busbars (35 ). 10. High-voltage substation, characterized in that it is constructed according to the process according to one of claims 1 to 9. 5 10 15 20 25 30 35 40 45 50 55 60 65 4