Transformer station with modular design

Abstract

Transformer station with a modular design and with a support structure (2) for stroke-controlled insertion and removal into or from a station housing (1) of the transformer station, wherein at least one transformer (3), a medium-voltage switchgear (7) and a low-voltage distribution (8) are fastened to the support structure (2), wherein they can be removed or inserted together from the station housing (1), wherein at least part of the station housing (1) is designed as a bottom-side concrete trough (11) into which the support structure (2) is accommodated, characterized in that the support structure (2) is arranged in the concrete trough (11) in a manner sealed against hot gases by means of at least one seal (14, 15, 18).

Description

[0001] The subject of the innovation is a transformer station with a modular structure according to the preamble of claim 1.

[0002] Transformer stations are essential components of power grids. They are also known as transformer stations, grid stations, distribution stations, substations, transfer stations, or pole-mounted transformers, but are often colloquially referred to simply as transformers.

[0003] In transformer stations, transformers convert electrical energy from one voltage level to another. Traditionally, transformers in transformer stations are mounted on the floor or on platforms. However, this can cause problems (e.g., in the event of a fault, if hot gases escape from the switchgear).

[0004] Transformer substations essentially consist of at least one substation enclosure, a transformer, a medium-voltage switchgear, and a low-voltage distribution board. Transformer substations are connected via cables and, depending on their design (accessible or non-accessible), are operated from inside or outside.

[0005] In practice, station enclosures have a service life of over 30 years. However, concrete stations limit the design options for the equipment and, in times of rapid advances, are being overtaken by electrical equipment. The energy transition, for example, is leading to stations being equipped differently than before. Therefore, replacement of components is inevitable over the course of a station enclosure's service life, whether due to increased power demand, economic, political, or environmental reasons.

[0006] Modular structures are known, in which individual components can be installed or replaced within a housing as needed. Components can be installed during the construction of the building, after its completion, during replacement of stations already in operation, during the renovation of a substation or transformer station, or during the upgrading of transformer stations. This also includes transformer houses and tower stations, as well as existing buildings that are being modernized, upgraded, or converted.

[0007] I Wiring during substation upgrades usually has to be done on-site while the substation is shut down. Only then can testing be performed. As a result, the deployment time cannot be accurately predicted in advance due to unforeseen interference factors and, as experience shows, takes significantly longer than planned. Industry practice requires the manufacturer to dismantle the transformer substation.

[0008] With previous methods, a time constraint also arises when removing a transformer enclosure. The switchgear installation can only begin after the cast concrete elements or other enclosure types have been completed and the fastening options and installation materials have been subsequently installed. Assembly is therefore sequential and cannot be shortened by parallel work. It depends, in particular, on the delivery times of the individual components and the station enclosure. The fundamental challenge is to design a distribution and / or substation for medium-voltage grids, especially local grids, that allows for more cost-effective construction while taking safety regulations into account.

[0009] In order to protect people in the event of a possible fault in a transformer station, e.g. due to an arc explosion, pressure relief and pressure diversion measures are required.

[0010] For example, DE 196 50 931 A1 shows that the built-in cabinets, which are stored equipped with the system components and assembled, are connected to the concrete parts only during final assembly.

[0011] DE 31 15 653 A1 describes a portable power distribution station that is not installed in a housing. This document discloses the use of a support frame with directly flanged or attached functional compartments that are supported by this support frame without any floor support.

[0012] EP 3 196 997 A1 demonstrates the use of a transportable base frame. The power distribution station shown here consists of a base frame, a transformer field module, a high-voltage field module, and a low-voltage field module, which can be manufactured independently and then assembled for each function. The modular design allows each module to be removed individually. The power distribution station can be lifted and transported using a forklift. This simplifies assembly and reduces production time, although no pressure relief concept is provided.

[0013] In document DE10114742C1, the pressure is diverted away from the switchgear operator by means of ducts. However, this document does not refer to a compact design equipped with additional electrical components.

[0014] The standard DIN EN 62271-202 "Factory-assembled high-voltage / low-voltage substations" (IEC 62271-202) requires an arc fault test. This test remains valid with the specified technical measures for discharging arc fault gases; it results in a functional unit whose size is determined by the station enclosure.

[0015] DE 298 04 513 U1 shows a compact substation, where the transformer and the high-voltage switchgear are mounted on a common support structure in such a way that they can be inserted into or removed from the substation's substation housing as a functional unit using a crane. At least part of the substation housing is designed as a concrete trough at the bottom with at least one chamber. However, this design raises safety concerns regarding the potential discharge of arc fault gases.

[0016] There is a need for a transformer station that can accommodate a transformer that is both protected from mechanical impacts and can safely dissipate the effects of hot gases in the event of a fault.

[0017] According to the invention, the problem is solved by the features of the independent claim, while advantageous embodiments and further developments of the innovation can be found in the subclaims.

[0018] An advantageous feature is that the supporting structure is sealed against hot gases with at least one seal in the concrete trough.

[0019] Preferably, the supporting structure is suspended from the concrete trough and has a suspension sealed against hot gases.

[0020] The suspension is sealed to prevent the escape of hot gases in the event of a fault. This protects a person in the immediate vicinity.

[0021] Pressure relief is provided, whereby the hot gases are discharged in the event of a fault via: - an expanded metal grid installed in the partition wall (MV room to transformer room) can be inserted into the transformer room, - an absorber mounted on the installed switchgear can be diverted into the medium / low voltage / transformer or medium-low voltage transformer room.

[0022] Depending on the design of the transformer station and the module, the gases can be discharged into all or only individual rooms via an expanded metal grid or an absorber.

[0023] The term 'hot gases' is deliberately broad, as it describes the diverse effects within a transformer housing, in particular an arc fault. This occurs due to the ionization of a gas, usually air, as a result of an electrical discharge between electrodes with different potential or phase positions, or between an electrode and ground. Such an arc, also known as an arc discharge, is referred to as an arc fault when a fault such as a short circuit in a switchgear occurs. While in the low-voltage range a galvanic short circuit is usually required for an arc fault, in the medium-voltage range even a drop below a minimum air gap between live parts of a switchgear can be sufficient.Although the probability of an arc flash in a switchgear installation is low, it should not be underestimated, as even low-energy arc flashes pose significant risks to personnel safety. Working on or near electrical equipment always carries the risk of an arc flash endangering people in the immediate vicinity.

[0024] The supporting structure preferably comprises a central transformer frame, which is at least partially inserted into the concrete trough, as well as side beams projecting laterally therefrom, which have a support profile on their free, trough-side edges.

[0025] The concrete trough has a circumferential receiving profile on at least three sides, which corresponds to the support profile. The receiving profile comprises a suspension surface formed by a horizontal leg, which carries at least one temperature-resistant seal, in particular a sealing strip or a rubber band, on which the support profile rests. In an advantageous development, this is a high-temperature-resistant seal.

[0026] In a preferred embodiment, the support profile carries the entire weight of the transformer module frame with the transformer and all electrical components.

[0027] The profiles, with or without seals, are intended to prevent danger to persons, especially in the horizontal floor plane when the protective doors are open, since there is no longer a gap for escaping gases, as was the case with the state of the art.

[0028] The sealing in the vertical direction to the transformer compartment is negligible, and the cable cutouts common in the industry also have no influence.

[0029] Absolute tightness is not absolutely necessary; rather, it is important that after the transformer module frame is installed in a housing or on a building floor, there is no gap between it and the wall and no passage to the horizontal plane. This is for personal safety.

[0030] Preferably, such interlocking profiles are provided in the area of ​​the medium-voltage switchgear on the three sides facing the station building.

[0031] Structurally, this type of sealing is also present in the transformer chamber area, although it is not necessary in all applications.

[0032] Although the following describes an arc fault in a medium-voltage switchgear, this hazard also exists in low-voltage switchgear and in the transformer area. Therefore, the technical concept of sealing can also be applied in the transformer or low-voltage switchgear area.

[0033] Provided that a sufficient sealing effect is achieved by the interlocking profiles and the seal, in certain cases the transformer module frame can rest at least partially on the floor or on a building wall.

[0034] The transformer station thus houses a transformer that is suspended and spring-mounted. The suspension is designed to effectively prevent both vibrations and the escape of hot gases in the event of a fault. Because the transformer is suspended in the station housing using a support structure, the transmission of vibrations from the transformer to other components of the station is also reduced.

[0035] The transformer unit and the frame parts surrounding it are referred to as the transformer module frame.

[0036] The innovation is suitable for walk-in transformer stations and non-walk-in transformer stations as well as for different switchgear and rated power levels and also for different types of design, including internal transformer stations in a room of a building.

[0037] The modules used are versatile and suitable for use with various switchgear types. They cover both air-insulated and SF6-insulated switchgear, offering high flexibility and reliability. Furthermore, they enable use in modern, more environmentally friendly switchgear, such as gas-insulated systems with fluorinated nitride or pure nitrogen, as well as in vacuum-based and hybrid switching technologies. This flexibility makes the modules ideal for applications in different voltage ranges and geographical conditions – from urban environments to demanding industrial applications. They offer high operational reliability and a long service life while meeting the latest standards in environmental protection and energy efficiency.

[0038] The modular design can be used in new and used transformer stations – whether non-accessible, accessible, or any other type of transformer station. The modules used are highly flexible and suitable for the construction of transformers of all types and designs. They cover a wide range of applications, including oil-immersed transformers, cast-resin transformers, dry-type transformers, and many other specialized designs. The modules offer outstanding performance, high reliability, and a long service life.

[0039] The seal is preferably elastic, allowing for a spring-loaded suspension. This further dampens vibrations and thus extends the transformer's service life.

[0040] The support profile consists of profile rails, in particular angle or U-rails, whose free leg ends point in the direction of the seal in the mounted position.

[0041] The transformer is located in a central chamber of the enclosure, separated from a pressure relief chamber below the medium-voltage switchgear by a vertical partition. The partition is designed and positioned so that any gas blast escaping from the switchgear in the event of an arc fault is directed toward the pressure relief chamber, thus providing an integrated pressure reduction device.

[0042] An expanded metal grid in a pressure relief opening with sufficient cross-section in the partition wall ensures that the building structure can withstand the internal pressure caused by an arc fault and that this pressure can escape safely.

[0043] The supporting structure preferably has suspensions to hang it on a lifting device, such as a crane.

[0044] In addition to the medium-voltage switchgear and the transformer, a low-voltage distribution board can be installed.

[0045] The medium-voltage switchgear, the low-voltage distribution board and the transformer are directly or indirectly flanged or suspended and fastened to the supporting structure and are carried as individual modules by this modular supporting structure, whereby everything is summarized below under the term complete module.

[0046] The modular design of the supporting structure, a frame construction with pre-assembled components, allows for installation in a corresponding station enclosure at the same or another location without neglecting safety aspects during construction. These include mobile and stationary transformer stations, which can be expanded, retrofitted, or upgraded in a time- and cost-saving manner.

[0047] The self-supporting structure, whose individual components are structurally stable and advantageously assume additional functional tasks, leads to significantly accelerated and more flexible completion of transformer stations and, in particular, to a sensible reduction in the variety of types and variants. Furthermore, the retrofitting and conversion of stations is simplified, as assembly work can be carried out in steps optimized for location and time.

[0048] A significant cost reduction is achieved by assembling the individual components cost-effectively into a complete module, which is transported to the assembly site as a unit or installed as a whole in a station housing.

[0049] For the purposes of this innovation, a "transformer module frame" refers to all structures suitable for arranging components in a gas or other transformer station. The term "module" or "complete module" refers to the design in which the individual components, such as the transformer, switchgear, or other power and safety-relevant elements, are assembled and ready for use due to their arrangement and function before installation in the station housing.

[0050] A complete module is a pre-assembled, tested, and ready-to-use unit consisting of a transformer, switchgear, and low-voltage distribution board. A complete module is a pre-assembled, tested, and ready-to-use unit consisting of the three essential components: transformer, switchgear, and low-voltage distribution board. The order in which these components are named is flexible and can vary without affecting the functionality of the module. Although the components are often named in different orders, this variability is fully covered by the innovation. The innovation makes it possible to adapt the order and terminology of the components as needed without affecting the functionality or integrity of the overall system. This means that even if the names or arrangement of the components differ, the same modular flexibility and operational reliability are guaranteed.

[0051] The complete module can be open, closed, or even partially closed. It is crucial that it is designed to allow it to be lifted and transported with the selected components. For example, the module can have a flat, rectangular shape with vertical struts on which all the necessary elements are arranged. Other shapes are also possible and can offer additional advantages.

[0052] The module is preferably designed as a rectangular structure. Pluggable, vertical struts allow for easy assembly and disassembly of the supporting structure or frame. This design allows for easy stacking, transport, and disassembly of the supporting structure or frame, while the individual components are easy to handle.

[0053] Such a module for the assembly of a transformer station offers the advantage that essential parts of the system can be pre-assembled and tested into individual modular, combinable systems, such as a frame, or into a system. These modules can then be integrated as a whole into the station housing.

[0054] The complete module is selected or individually equipped with electrical and non-electrical components according to customer requirements and can be modified, expanded and / or replaced later.

[0055] The center of gravity of the complete lifting module is selected in such a way that it only depends to a limited extent on the arrangement and size of the transformer.

[0056] Different module types are used for different station sizes. One module type can be used in several common station enclosures. Variants reduce the number of different module types. Customization options are determined by the choice of components, adjustable mounting options, and appropriate designs and testing.

[0057] The modular structure is carried out in the following steps: - Production of a platform or the main frame part as a supporting structure. - Manufacture of modular control panel walls or other electrical component assemblies. - Installation of several distribution rails to form a complete system. - Installation of cable holders and cable connections of all kinds. - Inserting the transformer into the main frame part. - Fixing the transformer to the main frame part. - Installation of the pre-assembled meters, outlet strips and other components. - Attaching the upper frame part.

[0058] Additional components can be mounted inside or outside the station housing, such as communication, test or measurement equipment, for example: - Medium voltage measurement with meter cabinet - Low-voltage measurement with meter cabinet - Reactive power compensation - Installations for monitoring the feed-in of renewable energy - Installations for network management and control in the field of smart grids - Frequency converter - Potential equalization - other electrical equipment.

[0059] In a preferred embodiment, the components—i.e., the transformer and medium-voltage switchgear, the low-voltage distribution system, and the measuring devices—are arranged on a common platform or in a common frame of a supporting structure. This has the advantage of simplifying the assembly and cabling work for the arranged transformer station components. Furthermore, the resulting complete, hook-and-socket module can be easily transported to the respective location. Completion or replacement on-site is thus possible cost-effectively and safely using a crane. Individual components of the module can be disassembled and assembled using screws and / or other assembly tools.

[0060] The design of the module's frames allows for a shape that simplifies stacking when split, disassembled, or folded. This saves space during storage and transport. The innovative frame for the module can be placed freestanding at its destination and can be stored and transported in parts or as a complete unit.

[0061] The innovation is not limited to a fixed arrangement and / or number of components, frames, vertical struts, or specific dimensions; rather, complete modules can be connected to the housing either detachably or permanently using suitable locking devices and / or mounting solutions. This makes it possible, for example, to replace a low-power module with a higher-power module in a station housing. Expansions within a complete module are also possible.

[0062] With this complete module, it is now possible for the first time to reduce installation costs to a minimum and to implement delivery separate from the station enclosure without compromising the safety of a tested station (tested according to IEC 1330). It should be noted that the IEC 1330 standard has since been replaced by IEC 62271-202. IEC 1330 originally specified requirements for high-voltage switchgear, but was superseded by the modern IEC 62271-202, which specifically addresses gas-insulated switchgear (GIS). The reference to IEC 1330 serves only as a historical reference to illustrate the development of standards in the field of switching technology.

[0063] This achieves the goal of minimizing storage costs and assembly work compared to a conventional transformer station expansion, reducing plant downtime during replacement operations, and making the work safer and more efficient. This is achieved with a corresponding reduction in costs for materials, warehousing, manufacturing, and on-site costs.

[0064] All partially finished or fully assembled modules are designed to be lifted or lowered using a crane or forklift. They are also suitable for transport on swap body vehicles, wheels, rollers, or skids. Other possible devices for safely picking up and lowering the module include locking devices, eyelets, container beams, all types of mechanical connections, as well as frame mounts or brackets for chain lugs.

[0065] The innovation offers the decisive advantage that in the event of a transformer station failure (e.g. fire, lightning strike, short circuit), an existing transformer station can be made operational again at short notice after gutting and installing a complete module.

[0066] The electrical components and cabling are designed to ensure that the connecting cables are optimally arranged and secured within the module frame, short, ready for use, and / or protected. A cable support, which ensures that the cables are held in place even in the event of a short circuit, can be adjusted to the installed cables by adjusting the height. The use of tools is generally unnecessary.

[0067] The gaps between the module and the station wall are equipped with a functional pressure reduction device. This consists of an expanded metal mesh and a special seal against the outer walls of the housing. In the event of pressure propagation, these measures significantly reduce the propagation of the pressure wave. By limiting a potential arc fault to a defined area, system safety is increased.

[0068] Simplified pre-assembly and assembly of the module reduces the amount of material and / or tools required, shortens assembly time, and thus lowers assembly costs. At the same time, assembly conditions are improved for the installers and the risk of injury is reduced, as work does not have to be carried out inside a station enclosure.

[0069] The module is designed so that, once installed, the required low- and / or medium-voltage cables can be routed and connected from the outside to the corresponding electrical connection points (e.g., medium-voltage switchgear and low-voltage distribution) according to industry standards. The electrical components used comply with applicable standards (IEC 62271-202, IEC 1330, etc.).

[0070] Comparable stations with or without transformers and with or without medium-voltage switchgear or low-voltage distribution or other electrical components for the supply, supply and / or distribution of electrical energy as well as stored energy or gas are also possible, as are corresponding auxiliary components such as lighting, measuring and metering components, telecommunications or communication equipment, etc.

[0071] The modules used are suitable not only for transformer construction, but also for a wide variety of electrical components of all kinds, such as remote control technology, remote diagnostics technology, protection technology, and monitoring electronics. They provide stable and reliable integration of these systems into transformer and switchgear systems, enabling comprehensive remote control, fault diagnosis, and real-time monitoring. Particularly in complex power distribution networks, they ensure that all electrical components operate efficiently and can be quickly identified and remedied in the event of faults.

[0072] The supporting structure is equipped with grounding points to prevent static charges. The complete module meets all requirements of DIN EN 62271-202, particularly with regard to safety requirements and arc fault testing.

[0073] In contrast to existing solutions, the innovation enables complete pre-assembly, reducing installation time on site by up to 40%.

[0074] The subject matter of the present innovation arises not only from the subject matter of the individual claims, but also from the combination of the individual claims with each other.

[0075] All information and features disclosed in the documents, including the abstract, in particular the spatial configuration depicted in the drawings, could be claimed as essential to the invention, insofar as they are novel, individually or in combination, over the prior art. The use of the terms "essential" or "according to the invention" or "essential to the invention" is subjective and does not imply that the features so named must necessarily be part of one or more claims.

[0076] The innovation is explained in more detail below using drawings illustrating several embodiments. The drawings and their descriptions reveal further essential features and advantages of the innovation.

[0077] They show: Fig. 1: schematic side view of the new module Fig. 2: Perspective interior view of a station housing Fig. 3: View of the insertion process of a complete module Fig. 4: Side view of a recording profile in a variant Fig. 5: Side view of a recording profile in another variant Fig. 6: Perspective view of the profiles Fig. 7: schematic side view of a supporting structure in a concrete trough (VII = detailed view of Fig. 7) Fig. 8: schematic side view of a supporting structure Fig. 8a, Fig. 8b: Detailed views of Fig. 8

[0078] The Fig. Figure 1 illustrates the supporting structure 2, which serves as a support for the individual components or modules. This supporting structure 2 preferably consists of a robust steel frame. The base section 5 of the frame can be implemented as a standalone frame, as a suspended structure, or in the form of a platform.

[0079] The supporting structure 2 has a typically rectangular shape and houses the transformer 3 inside. In addition, the supporting structure 2 is equipped with fastenings for the electrical components.

[0080] The intermediate wall 42 in the concrete trough 11 is provided with a pressure relief device 10, which is preferably designed as an expanded metal mesh. Additional cable penetrations, which are usually realized as concrete cutouts, are not shown in the figure.

[0081] As in Fig. As shown in Figure 1, the partition wall 42 separates the transformer chamber 43 from the pressure relief chamber 44, which is located beneath the medium-voltage switchgear 7. The pressure generated here can be directed in the direction of arrow 22 through the expanded metal mesh toward the central chamber 43. Due to the seal in the area of ​​the profiles 15 and 27, upward gas escape is not possible.

[0082] Additionally, the hot gases can be diverted into the medium / low-voltage compartment or the medium- and low-voltage compartment via an absorber mounted on the switchgear. This is indicated by arrow direction 4.

[0083] The arrangement on a common support structure 2 allows the complete module to be transported to the site of use, where it can be inserted, for example, into a tray 11. Transport is facilitated by the standardized mountings and / or fastening devices.

[0084] The supporting structure 2 is preferably equipped with two side members 26 and 21, wherein at least the left side member 26 has a C-shaped support profile 27 on its underside. This profile 27 engages with a tub-side receiving profile 15, which is designed as a C-shaped profile inverse to profile 27.

[0085] Through this suspended mounting of the supporting structure 2, the base area of ​​the transformer 3 is positioned above the hot-dip galvanized rail 36.

[0086] The reference number 6 generally indicates the frame with the cable routing.

[0087] Fig. Figure 2 illustrates the interior of a station housing 1 and a typical initial situation for the assembly with electrical equipment. It shows a bottom-side tray 11, on whose upper surface a frame structure 30 is mounted, consisting of several joined profile frames 32. In this design, known from the prior art, the slots and gaps to the side wall 12 of the station are covered with molded plastic panels 32.

[0088] The station housing is equipped with protective doors 31, which are Fig. 2 are shown closed.

[0089] This frame structure 30 consists of industry-standard substructures formed by cast-in profile rails, also known as halter rails. An angle plate is attached to these, on which the profile frames 32 rest.

[0090] In the conventional construction of station enclosures, cut-to-size press-in panels 33 are inserted and screwed between the profile frames 32 and the station wall in order to minimize the gaps 34 and 35 between the profile frames and the station wall or other adjacent components. In particular, the gap 35 in the front area of ​​the Fig. 2 is relevant because a person can be here.

[0091] However, since the pressed material plates 33 often do not lie completely flush against the station wall and / or the profile frame 32 or no pressed material plates are installed in certain areas, gaps 34 and 35 remain through which hot gases can escape.

[0092] Fig. Figure 3 illustrates the supporting structure 2, which is inserted into a station housing 1 via a lifting device 46. This station housing 1 is designed as a non-accessible transformer station, which is partially submerged in the ground and provides a substation for the transformer 3.

[0093] The station housing 1 comprises a concrete trough 11, to which the front and side walls are cast, and at least one roof plate is attached. A recess for a fan door 31 or a similar door-like closure element of the transformer compartment is provided in at least one of the walls.

[0094] This is a transformer station with a modular design and with a support structure 2 for stroke-controlled insertion and removal into or from the station housing 1 of the transformer station, wherein at least one transformer 3, a medium-voltage switchgear 7 and a low-voltage distribution 8 are fastened to the support structure 2 and can thus be removed or inserted together from the station housing 1, wherein at least part of the station housing 1 is designed as a bottom-side concrete trough 11 into which the support structure 2 is received, wherein the support structure 2 is arranged in the concrete trough 11 so as to be sealed against hot gases by means of at least one seal 18.

[0095] In the front area of ​​the supporting structure 2 there is a space 9 for a meter cabinet.

[0096] The Fig. 4, Fig. 5 and Fig. 6 shows the side rail 21 and the interlocking profiles in the area of ​​the medium-voltage switchgear.

[0097] The side rails 21a and 21b of the variants according to Fig. 4 and Fig. 5 each rest on a receiving profile 14 or 15, which is anchored with at least one hammer head screw as a screw connection 13.

[0098] Fig. 4 shows a side member 21a with a straight course in its longitudinal direction.

[0099] Fig. 5 shows a side member 21b which has a downwardly open profile at its end.

[0100] In the Fig. 4 and Fig. 5, the side members 21a and 21b rest primarily on a sealing strip 18, which is mounted on the receiving profiles 14, 15. This sealing strip 18 is temperature-resistant and prevents the escape of gases when the profiles interlock.

[0101] In order to prevent the side member 21 from being pushed upwards in the event of a sudden increase in pressure below the side member, a profile 20 is located on the upper side of the side member, which is connected to the side wall 12 of the station housing 1 by means of a screw connection 19.

[0102] This allows the transformer module to be inserted with a certain amount of clearance, between 10 and 20 mm. This eliminates the need for molded plastic panels, as there is no gap.

[0103] Due to the at least partial suspension, unevenness in the area of ​​a possible contact surface does not play a role.

[0104] Fig. Figure 6 shows the receiving profile 15 with a horizontal leg 16, which forms a suspension surface on which the seal 18 rests as a sealing strip, on which the support profile 27 rests with the leg 23. The support surface 16 transitions into a vertical leg 17, which engages in the space between the legs 23, 25 of the support profile 27. The two vertical legs 23, 25 are connected by a horizontal leg 24.

[0105] Fig. 7 shows the supporting structure 2, to whose frame the medium-voltage switchgear 7 (not shown), the low-voltage distribution 8 and the transformer 3 can be directly or indirectly flanged or suspended and fastened and can be carried by this supporting structure without ground support.

[0106] The supporting structure 2 is sealed against hot gases by at least one seal 18 arranged in the concrete trough 11. The seal 18 is preferably arranged on the inside of the concrete trough 11.

[0107] The supporting structure 2 comprises a central transformer module frame 47, which is at least partially inserted into the concrete trough 11, as well as side beams 21, 26 projecting laterally therefrom, which have a support profile 27 on their free trough-side edges.

[0108] The concrete trough 11 has a circumferential receiving profile 15 on at least three sides, which corresponds to the support profile 27.

[0109] The receiving profile 15' according to detail VII has a suspension surface formed by a horizontal leg 16, on which a sealing strip 18 rests, on which the support profile 27 rests with the leg 23. The receiving profile 15' forms a modification of the preferred receiving profile 15, in which the wall-side leg points in the direction of the floor.

[0110] A transformer 3 (not shown) is inserted with the transformer module frame 47 shown into a central chamber 43 of the trough 11, which is separated from a pressure relief chamber 44 below the medium-voltage switchgear 7 by a vertical partition wall 42. The partition wall 42 is designed and positioned such that a gas blast escaping from the medium-voltage switchgear 7 in the event of an arc fault is directed laterally in the direction of arrow 22 toward the central chamber 43 below the transformer 3.

[0111] Fig.Figure 8 shows a reduced support structure 2, which can be raised and lowered using two suspensions 29. The suspension 29, which can be seen in the enlarged view 8a, consists of a flat metal piece with a recess 40 in the upper area for attaching a crane hook (not shown).

[0112] In the lower area, the suspension 29 has a rectangular recess 38 that encloses the square tube 28 of the frame on three sides. There is a slight clearance between the edges of the recess 38 and the outer circumference of the square tube 28, allowing the suspension 29 to move slightly relative to the square tube in the direction of the arrow 39.

[0113] Detailed view 9b shows how the square tube 28 is accommodated within the recess 38. During assembly of the complete module, the relative movement between these two parts can be prevented by a clamping screw (not shown), which fixes the parts against each other.

[0114] The suspension also features a recess 41, which is smaller than recess 40. This recess can accommodate, for example, a guide line to control the frame suspended from a crane. Alternatively, recess 41 serves as a grounding point. Drawing legend 1 station housing 2 Supporting structure 3 Transformer 4 Arrow direction 5 Floor area 6 Frame and cable routing 7 Medium-voltage switchgear 8 Low-voltage distribution 9 Recording room 10 expanded metal mesh 11 tub 12 side wall 13 Screw connection 14 Recording profile 15, 15' recording profile 16 legs 17 legs 18 Seal 19 Screw connection 20 Profile 21 Side rail a, b 22 Arrow direction 23 legs (vertical) 24 legs (horizontal) 25 legs (vertical) 26 side rail 27 Support profile 28 square tube 29 Suspension 30 Frame construction 31 Door 32 profile frames 33 Pressed material plate 34 gap 35 gap 36 rail 37 38 Recording 39 Arrow direction 40 recess 41 recess 42 Partition wall 43 Transformer chamber 44 Pressure relief chamber 45 46 Lifting device 47 transformer module frames QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 196 50 931 A1

[0010] DE 31 15 653 A1

[0011] EP 3 196 997 A1

[0012] DE 10114742C1

[0013] DE 298 04 513 U1

[0015] Cited non-patent literature

[0000] DIN EN 62271-202

[0014]

Claims

[1] Transformer station with a modular design and with a supporting structure (2) for stroke-controlled insertion and removal into or from a station housing (1) of the transformer station, wherein at least one transformer (3), a medium-voltage switchgear (7) and a low-voltage distribution (8) are fastened to the supporting structure (2), wherein they can be removed or inserted together from the station housing (1), wherein at least a part of the station housing (1) is designed as a bottom-side concrete trough (11) into which the supporting structure (2) accommodates, characterized by that the supporting structure (2) is arranged in the concrete trough (11) sealed against hot gases by at least one seal (14, 15, 18). [2] Transformer station according to claim 1, characterized by that the seal (14, 15, 18) is arranged between the upper circumferential front edge of the concrete trough and the underside of the supporting structure (2). [3] Transformer station according to one of claims 1 to 2, characterized by that the seal (14, 15, 18) is arranged on the inside of the concrete trough (11). [4] Transformer station according to one of claims 1 to 3, characterized by that the supporting structure (2) comprises a central transformer module frame (47) which is at least partially inserted into the concrete trough (11) and side beams (21, 26) projecting laterally therefrom, which have a support profile (27) on their free trough-side edges. [5] Transformer station according to one of claims 1 to 4, characterized by that the concrete trough (11) has a circumferential receiving profile (15) on at least three sides, which corresponds to the support profile (27). [6] Transformer station according to one of claims 1 to 5, characterized bythat the receiving profile (15) has a suspension surface formed by a horizontal leg (16) which has the at least one temperature-resistant seal (18), in particular a sealing strip, on which the support profile (27) comes to rest. [7] Transformer station according to one of claims 4 to 6, characterized by that the support profile (27) consists of profile rails, in particular angle or U-rails, the free leg ends (23) of which point in the direction of the seal in the mounted position. [8] Transformer station according to one of claims 1 to 7, characterized bythat the transformer (3) is inserted into a central chamber (43) of the trough (11), which is separated from a pressure relief chamber (44) below the medium-voltage switchgear (7) by a vertical partition wall, and that the partition wall (42) is designed and positioned in such a way that a gas surge escaping from the transformer (3) in the event of an arc fault is directed laterally in the direction of a pressure relief chamber (44) below the medium-voltage switchgear (7). [9] Transformer station according to one of claims 1 to 8, characterized by that suspensions (29) are provided on the supporting structure (2) in order to suspend the supporting structure (2) from a lifting device (46). [10] Transformer station according to one of claims 1 to 9, characterized bythat the medium-voltage switchgear (7), the low-voltage distribution (8) and the transformer (3) are directly or indirectly flanged or suspended and fastened to the frame of the supporting structure (2) and are carried by this supporting structure without ground support.

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