FR2772198A1 - Concept and construction of indoor high tension switching installation - Google Patents

Abstract

The high tension switching installation is formed from prefabricated walls (V1,V2,V3), base (h1) and top panel (h2), with internal connectors (DSL) and supports (Ch) mounted on the walls in readiness for connection to the circuit breakers (D). The floor panel, side and dividing walls and top panel are prefabricated and assembled on site using interlocking tongues and recesses formed in the panels.

Description

DEVICE FOR DESIGNING A HIGH VOLTAGE ELECTRICAL STATION WITH
VISIBLE CUT-OFF WITH SINGLE OR DOUBLE SET OF BARS AND METHOD FOR
CONSTRUCTION.

To date, the construction of a high-voltage indoor electric station is underway
from air-insulated enclosure or compartment, including equipment
three-phase for one or more cells - see prior art of patent FR 2669782 Al- ce
which limits this prefabrication to 63-90 KV voltages for dimensional reasons
-ment of box which allow its transport on the site; these equipments have mass
from 8 to 10 tonnes which requires delicate handling, and interventions on the
busbars for connecting them; construction of a building of
protection, after the installation of the equipment, leads to increasing the
realization of the station; this prefabrication formula does not authorize its application to
voltages above 90 KV and therefore presents a major incompatibility for
export.

The prior art also proposes a second type of construction by the patent
FR25661 99 (84.09.362) of the interior type which has the disadvantage of most
assembly work carried out on site, namely climatic hazards with impact on the
lead time, and do not offer a guarantee of factory production with trial
high voltage circuits before shipment. There is also a third type of
realization in a shielded gas-insulated substation, the relatively high cost of which limits
its use for specific applications.

The present invention relates to the construction of a high electrical station
tension which eliminates the drawbacks stated above by proposing a new
high-voltage station design associating patent FR 870637 with the layout
high voltage electric.

Another object of the invention is to reduce the overall time taken to complete a station by
the execution in masked time of the site building, and the construction in the factory of the elements
frames.

Another object of the invention is to provide a high voltage station which does not include
no isolation compartment in the air and related controls,
design this station in one level for a simple or double play layout
busbars, in a size comparable to that of an armored station.

Another object of the invention is to reduce losses by the Joule effect by reducing the
length of high voltage circuits in the ratio of 4 to 1 and decrease the number of
connections to control of the high voltage circuit in the ratio of 5 to 1, which
results in better reliability of the installation.

 Another object of the invention is that it allows the possibility of making the circuit breaker disconnectable by the simultaneous operation of the disconnecting devices surrounding the circuit breaker.

 Another object of the invention is the construction in the same space and with the same elements of an electric station in single or double set of bars.

 All these objects lead to significant savings by reducing factory assembly times, by reducing assembly times on site independently of the weather, by reducing packaging and transport costs (road or rail gauge), by reducing manufacturing costs thanks to industrialization, by reducing land cost thanks to the reduction in surface area, by reducing civil engineering costs thanks to the 25% reduction in the surface area of the high-voltage building and its construction in one level as well as the passage to 4 meters from the height of the building instead of 6 meters currently.

 This design of the station and its construction process also finds its application in the case of a mobile station on a truck and in the case of an outdoor station, subject to some modifications.

Station design:
The smallest high-voltage station in use has at least two cells, an incoming cell and a departing cell. It is on this type of station with an indoor single or double busbar formula that the description will be made, without jeopardizing its application. at a station made up of a larger number of cells, in this case, we will choose a prefabrication modularity involving two or three cells, or even four cells, which, placed end to end, will reconstitute the station according to its importance. The connection to the network of this station can be made either directly by underground cable, or by overhead line via a model interior exterior crossing. The materials used are conventional circuit breakers, mini oil, SF6 gas, vacuum interrupter. These circuit breakers are equipped with a mechanical or hydraulic or pneumatic control arranged in the extension of the axis of the three breaking poles and of the dry-insulated switchgear, including the visible cut-off disconnection device which is the subject of patent FR 8705637.

The busbar (s) are arranged in a plane parallel to the circulation corridor; the horizontal axis of the three breaker poles is arranged in a plane perpendicular to the circulation corridor. The station is designed without air isolation compartment while benefiting from the visible cut-out - see figure 6
The device is based on the design of the station described on the basis of the mechanical association on the site of four types of framework elements each having specific functions and a weight of less than 1000 Kg requiring no heavy handling equipment on the site by the fact that their implementation is carried out by shifting.

The device will be better understood by referring to the figures. Figure 1, frame element P installed horizontally, shows a floor for two cells in three-phase equipment single or double busbar. Figure 2, frame element S installed vertically, shows a physical partition between two cells in three-phase equipment single or double busbar. FIG. 3, a frame element Fa installed vertically, represents the facade fitted out for two cells in single or double busbar equipment. FIG. 4, frame element Ph installed vertically, represents a device relating to the arrangement in single-phase single busbar for the equipment of two cells. FIG. 5, frame element Phd installed vertically, represents the method of making the arrangement in single phase double busbar for equipment
two cells from the device figure 4 Ph element frame. Figure 6, section 1-1 shows on the left part the three-phase arrangement in simple busbar with possibility of aerial departure Ae or underground cable As. The right part of Figure 6, section 1-1, shows the three-phase arrangement in double busbar. This figure 6 also shows that the displacement along the arrow of the sectioning elements SB and SL achieves the visible cut. FIG. 6a represents a plan view of a station in single or double busbar. The left part, single busbar station, shows the positioning of the frame elements S, Ph and Fa, through the openings 01, 02 and 03.The right side, double busbar station, shows the positioning of the frame elements S, Phd and Fa through the openings 01, 02b and 03.

* Frame element "P" -figure 1
This frame element is constituted either by a fully welded metal frame made from a profile rail, or by a composite material capable of fulfilling the same functions, namely: - establishing a reference level for the placement of the frame elements "S "Figure 2," Fa "Figure 3, and" Ph "Figure 4 or" Ph d "Figure 5.

- serve as guidance, positioning and equipotentiality of the masses to the framework elements set out above.

- allow the passage of high voltage cables in the case of supplying the station by underground connection.

- serve as a route for the low voltage cables ensuring the connections between the various single-phase frame elements and their grouping and control box.

The frame element "P" in Figure 1 is dimensioned for the three-pole arrangement of two single or double busbar cells; its thickness of 200mm corresponds to the height of the concrete screeds used in an electrical building for the realization of low voltage channel; it is made up of three metallic slides in L1 marked g dimensioned to allow the setting in place by shifting of the three frame elements "S" in Figure 2, six metal slides enllrepère g2 sized to allow the setting in place by shifting of the three frame elements "Ph "Figure 4 in the single busbar configuration, twelve metal slides in the G4 locator dimensioned to allow the insertion by sliding of the three frame elements" Phd "Figure 5 in the double busbar configuration, a metal slide in the G3 dimension allow the setting in place by shifting of the frame element "Fa" figure 3 The slides are equipped at one end and on the inner face of the wings, with copper shims CA figure 1 which ensure the centering of the frame elements in their respective slide and the equipotentiality contact of the masses of the various framework elements. The depth of the slide gl is provided to allow the crossing in a vertical plane of the frame elements "Ph" figure 4 or "Phd" figure 5 with the frame elements "S" figure 2 taking into account the thickness of the horizontal upright of the frame element "S". The center distance of the slides gl corresponds to the center distance of the partition walls of departure or arrival cell and the center distance of the rails g2 corresponds to the center line of the poles of the circuit breaker.

* Frame element "S" -figure 2
This frame consists of a fully welded metal frame, made from hollow profiles with rectangular section for vertical uprights and metallic profiles in rr for the two horizontal uprights. It can also be designed from composite material. Its function is multiple, namely - to establish a physical screen of separation of two cells.

-contribute to the metal framework of the station.

-serve to keep the frame element "Ph" in figure 4 or "Phd" in figure 5 in vertical position during their installation.

- serve as routing for low voltage cables ensuring the connections between the various single-phase frame elements and their control and grouping box - hide the openings made in the wall of the building to allow the installation of these frame elements - allow, from vertical uprights, to realize on the same type of frame element, a use for the layout of the station either as a single busbar, or as a double busbar.

The frame element "S" in figure 2 is dimensioned in thickness to 100mm maximum, in width for the depth of the station plus the thickness of the surrounding wall of the station and in height to allow the crossing in vertical position of the frame elements "Ph" figure 4 or "Phd" figure 5 with the frame elements "S" figure 2 through the openings
SO figure 2.

positionné sur les ailes pour réduire les frottements sur les glissières de l'élément cadre "P" figure 1; à chaque extrémité de ce montant et sur les faces extérieures des ailes est prévue une surface traitée B figure 2 pour assurer le contact d'équipotentialité des masses prévu sur les glissières gl, un montant horizontal h2 constitué par un profil enLJ qui dispose dans son prolongement sur une extrémité, d'un retour en équerre pour assurer le maintien en position verticale de l'élément cadre "Fa"figure 3 3 au cours de son installation, de quatre montants verticaux vl, v2, v3, v4, constitués par des profils creux de section rectangulaire qui assurent un cloisonnement physique entre deux cellules et garantissent la non perforation de ceux-ci par un arc électrique d'une intensité correspondant à la puissance de court circuit de l'installation. Dans le cas de station simple jeu de barres, on rajoute sur cette structure 6 montants verticaux v5,v6, v7,v8 ,v9 ,v10, constitués par des profils creux de section rectangulaire qui assurent la même fonction que les montants vl,v2,v3,v4. Dans les deux cas de station simple ou double jeu de barres, I'entr'axe des ouvertures SO correspond à l'entraxe des pôles du disjoncteur. Un parement vertical Pvl en acier ou autre matériau est fixé sur le montant vertical vl figure 2 dans le but de masquer l'ouverture Ol figure 6 aux positionnements définitifs des éléments cadre "S"figure 2.The frame element "S" in Figure 2 has a basic structure for a double busbar station; it includes a horizontal upright hl constituted by a profile in

positioned on the wings to reduce friction on the slides of the frame element "P" Figure 1; at each end of this upright and on the outer faces of the wings is provided a surface treated in FIG. 2 to ensure the equipotentiality contact of the masses provided on the slides gl, a horizontal upright h2 constituted by a profile in LJ which has in its extension on one end, a square return to maintain the vertical position of the frame element "Fa" Figure 3 3 during its installation, four vertical uprights vl, v2, v3, v4, formed by profiles hollow of rectangular section which ensure a physical partitioning between two cells and guarantee the non-perforation of these by an electric arc of an intensity corresponding to the power of short circuit of the installation. In the case of a single busbar station, 6 vertical uprights v5, v6, v7, v8, v9, v10 are added to this structure, formed by hollow profiles of rectangular section which perform the same function as the uprights vl, v2, v3, v4. In both cases of single station or double busbar, the center distance of the openings SO corresponds to the center distance of the poles of the circuit breaker. A vertical facing Pvl made of steel or other material is fixed to the vertical upright vl in figure 2 in order to hide the opening Ol in figure 6 at the final positions of the frame elements "S" in figure 2.

* Frame element "Fa" -figure 3
This frame consists of a fully welded metal frame, made from two horizontal uprights and three vertical faceplates. Between the vertical faceplates are installed two cell closure fronts. The functions of this "Fa" framework element are as follows: - to establish a physical separation screen between the energized equipment of the cells and the operating corridor.

-contribute to the metal framework of the station.

- hide the opening made in the wall of the building to allow the installation of this element. serve as a support for all the low-voltage equipment of the high-voltage devices of the cubicles.

positionné sur les ailes pour réduire les frottements sur les glissières g3 de l'élément cadre"P"figure I ; à chaque extrémité de ce montant, sur les faces extérieures des ailes, est prévue une surface traitée C figure 3 pour assurer le contact d'équipotentialité des masses sur la glissière g3 figure 1. Sur le montant v2 figure 3 est fixé un parement Pvl en acier ou autre matériau dont le but est de masquer l'ouverture 03 figure 6 dans le positionnement définitif de l'élément cadre Fa" figure 3. Cet élément cadre est identique quel que soit l'aménagement de la station en simple ou double jeu de barres, sauf en ce qui concerne l'équipement basse tension des plastrons vl et v2
*Elément cadre "Ph" figure 4
Cet élément est constitué de montants horizontaux et verticaux assemblés par soudure.The frame element "Fa" in Figure 3 is dimensioned at a thickness of 300 to 350mm for a length corresponding to the arrangement of two cells. The framework of the frame element "Fa" in Figure 3 consists of two identical vertical faceplates vl, v2 and a vertical facing v3, made of folded sheet metal, welded to two horizontal uprights hl and h2
also made of folded sheet metal. Between the vertical facing v / -v3 and v3- v2, metal doors Fl,, F2, F3, F4 are installed, over a height of 2500mm allowing access to the interior of the cells. In these doors is an opening O Figure 3 sized to allow the passage of the circuit breaker control cabinet. These doors can be designed in a mesh frame. The vertical faceplates vl, v2 are sized for the entire height of the station with a width of 400mm and a depth of approximately 350mm. In the width and depth of these faceplates are installed the low voltage motors reference M for control of the disconnecting devices and the control and grouping boxes, reference Cc. The v3 faceplate is dimensioned for the height of the station with a width of 100mm corresponding to the thickness of the frame elements "S" in figure 2. The horizontal upright hl consists of a profile

positioned on the wings to reduce friction on the slides g3 of the frame element "P" in figure I; at each end of this upright, on the outer faces of the wings, there is a surface treated C in figure 3 to ensure the equipotentiality contact of the masses on the slide g3 in figure 1. On the upright v2 in figure 3 is fixed a Pvl facing in steel or other material whose purpose is to mask the opening 03 figure 6 in the final positioning of the frame element Fa "figure 3. This frame element is identical regardless of the layout of the station in single or double set of bars, except for low voltage equipment on vl and v2 faceplates
* Frame element "Ph" figure 4
This element consists of horizontal and vertical uprights assembled by welding.

Its function is multiple: -contribute to the final framework of the station.

-constitute a single chassis for all of the high-voltage single-phase switchgear using the chassis specific to the devices.

- hide the opening made in the station wall to allow the installation of this element.

-provide shock protection for high-voltage equipment during handling of this element.

-make high voltage equipment in their entirety in a weight less than 1000Kg compatible with a standard road or rail shipment.

The frame element in Figure 4 is dimensioned in width between 350 and 400mm for
allow good protection against mechanical shock during handling of these frame elements. The length of the frame element is defined by the single-phase equipment of two cells. The height of the frame element "Ph" depends on the type of circuit breaker used and its coupling with the disconnecting device
DSB figure 4. The frame element "Ph" figure 4 includes the following equipment: -two breaker poles, reference Dj with their support frame Ch.

-a DSB bar sectioning device.

-two line disconnecting devices with built-in earthing switch
DSL.

-the potential transformers included in the sleeves of DSL.

-the Maltl Malt2 earthing contacts of the SLI SL2 SBI sectioning devices
SB2.

The frame element consists of a horizontal upright hl made of sheet metal folded into a shape
positioned on the wings to reduce friction on the slides g2 of the element "P" in figure 1.

At each end of this upright, on the outer faces of the wings, there is a treated surface C figure 4 to ensure the equipotentiality contact of the masses on the slides g2 figure 1. On this upright are installed the two fixed circuit breaker chassis Ch by welding on this upright The vertical uprights vl, v3 and horizontal h2 are formed by the chassis of the DSB and DSL devices figure 4; the vertical upright v2 is constituted by a hollow profile with rectangular section assembled on the uprights hl and h2 by screw and nut in order to reinforce the structure of the frame element "Ph" while allowing the dismantling of DSB figure 4 and d 'establish a physical separation screen between two cells by masking the opening O of the frame element "S" Figure 2 after its final implementation. On the v2 upright is fixed a Pvl steel facing or other material in order to completely hide the O2 openings after the final positioning of the "Ph" frame elements. The three "Ph" frame elements are identical
* Frame element "Phd" figure 5
This frame element is used in the case of a double busbar station. It consists of the parallel assembly of two frame elements "Ph" in Figure 4, each equipped with a DSB sectioning device, a device DSL sectioning switch and two circuit breaker poles for the entire "Phd" element
The assembly is carried out starting from a traditional or prefabricated building of which two perpendicular external walls comprising openings Oi, 02, O3 figure 6 dimension -nées to allow the installation by shifting from the outside of the building and in the following order: a frame element "P" in figure 1, 3 frame elements "S" in figure 2, a frame element "Fa" in figure 3 and three frame elements "Ph" in figure 4.

 * Frame element "P" figure 1: the installation can be done either directly before the realization of the roofing of the building, using a construction crane, or by shifting in a vertical plane from the outside of the building through the O3 opening Figure 6, then tilting in a horizontal plane for its final installation on two Halfen rails previously sealed in the slab of the building.

 * Frame element "S" in Figure 2: successively placing the three frame elements "S" by shifting in a vertical plane from the outside of the building through the openings 01 in Figure 6. The guidance and final positioning of these frame elements are ensured by the gl glides of the frame element "P" in figure 1. The embedding of each element "S" in their respective opening Ol maintains the vertical position of these frame elements "S". One of the vertical uprights of these frame elements is equipped with a facing Pv Figure 2 whose purpose is to completely hide the openings Ol in the final positioning of these frame elements.

 * Frame element "Fa figure 3: establishment of the frame element" Fa "by shifting in a vertical plane from outside the building through the opening O3 figure 6. The guidance and the final positioning of this frame element are ensured by slide g3 of the frame element "P" in figure 1. Maintaining in a vertical position is ensured on the one hand by the square return appearing on the upper horizontal upright of the frame element "S" in figure 2 and d on the other hand by the embedding in the opening O3 in FIG. 5 of the Pvl facing fixed on a vertical upright of this frame element, the aim of which is also to completely hide the opening O3 in FIG. 6 in the final positioning of this element. this assembly phase carried out only by handling of the frame element, they are mechanically assembled together to form the framework of the station.

 * Frame element "Ph" in Figure 4: successively placing the three elements "Ph" or "Phd" by shifting in a vertical plane from the outside of the building through the openings 02 in Figure 6.The guidance and the final positioning are provided by the g2 slides (frame element "P" in figure 1) for a single busbar station and by the g4 slides of this same element "P" for a double busbar station. Maintaining in a vertical position during handling and its final positioning is ensured on the one hand by the vertical uprights embedding the openings SO of the frame elements "S" in Figure 2 and by the embedding in the openings O2 in Figure 6 of Pv2 facing fixed on a vertical upright of this “Ph” frame element, the aim of which is also to completely hide the openings O2 in FIG. 6 when these elements are definitively positioned.

* Mechanical assemblies: to complete the assembly operations on site, we proceed to the installation of mechanical linkages between the various materials installed on the frame elements "Ph" figure 4 and the frame element "Fa" figure 3.

After fixing the elements "Ph" in Figure 4 on the framework made previously as well as the realization of low voltage wiring between the different frames and control of low voltage circuits the station is ready to be energized, without it there was intervention on the high voltage circuit.

Claims (1)

 CLAIMS:  10 Device for designing a high voltage electrical station with visible cut-off, single or double busbar, characterized in that it includes elements allowing the subdivision of the station into four types of interdependent framework elements Ph, P, S, and Fa for a single busbar station and Phd, P, S, and Fa for a double busbar station.  2 Di. spositif according to claim 1, characterized in that it consists in realizing on a single type of modular frame element Ph, all the high-voltage arrangement of an electric station from a single-phase equipment single busbar for two or more cells comprising the following equipment: DSL, DSB, SL1, SL2, SB sectioning devices, their respective grounding MALT1 and MALT2 as well as the Dj circuit breaker poles and their chassis Ch.  30Devices according to claim 1, characterized in that it consists in carrying out on a single type of modular frame element Phd all the high-voltage arrangement of an electrical station from a single-phase equipment double busbar for two cells or more comprising the following equipment: DSL, DSB, SLl, SL2, SB1, SB2 sectioning devices, their respective grounding MALT1 and MALT2 as well as the circuit breaker poles Dj and their chassis Ch. This framework element Phd being produced by the assembly of two framework elements Ph.  40A device according to claims 2 and 3, characterized in that the uprights V1, V3 and h2 of the frame element Ph are constituted by the own chassis of the DSB and DSL devices  S0Dispavitzf according to claims 2 and 3, characterized in that it consists in carrying out the disconnectable function of the circuit breaker Dj with the same switchgear by the simultaneous opening according to the arrows of the sectioning elements SB1 and SL1 or SB2 and SL2.  6 Sun. spositif according to claim 1, characterized in that it consists in producing for a three-phase equipment single or double busbar for two or more cells, a single type of frame element P consisting of slides g1, g2, g3, g4, which ensure during the assembly on site the guiding and the final positioning of the frame elements S, Fa, Ph or Phd as well as the equipotentiality of the masses via the shim CA.  70A device according to claim 1, characterized in that it consists in producing for a single-phase or double busbar three-phase equipment a single type of frame element S consisting of two horizontal uprights hl and h2 and ten vertical uprights vl to v10 for use in single busbar or four vertical uprights vl, v2, v3, v4, in use double busbar. These vertical uprights constituting a physical screen between two three-phase cells and ensuring during assembly on site, guidance and the positioning of the framework elements Fa, Ph or Phd.  80A device according to claim J, characterized in that it consists in producing, for a three-phase equipment single or double busbar for two or more cells, a single type of frame element Fa consisting of two horizontal uprights hl and h2, three vertical uprights v1, v2, v3 and four doors F1, F2, F3 and F4. This assembly constituting a cubicle facade on the operating corridor side on which the command and control members M, CC necessary for the operation of high voltage equipment.  90 Process for constructing an electric station according to the provisions of all of claims 1 to 8, characterized in that the production of a high-voltage station in a previously constructed building is carried out by shifting the various frame elements S, Fa, Ph or Phd through openings 01, 02, 02b, 03 made in the two perpendicular walls of the station building, that the mechanical assembly of elements S, Fa and P constitute the structure of the station and that only the framework elements Ph or Phd constitute the high voltage electrical installation.  J O0 Process according to claim 9, characterized in that it consists of the openings  01.02, 02b, 03 practiced in the two perpendicular walls of the station building are hidden from the final positioning of the frame elements S, Fa, Ph by the PV1 facings installed on the vertical uprights of these elements