DE102013002726B3 - Extension housing for energy system e.g. transformers station, has two expansion brackets that are connected with lifting bolt and mounting platform for covering rear area, central portion and front corner - Google Patents

Abstract

The extension housings has a sheet steel housing (1) and energy components such as transformer, a medium-voltage switchgear and low voltage distribution board. An oil-tight base tray (2) is arranged with sheet steel housing and is provided with a lifting function by a lifting bolt (3). The base tray is provided with two expansion brackets. The brackets are connected with the lifting bolt and mounting platform for covering the rear area, central portion and front corner which are used for supporting the entire cabinet system.

Description

Technical area

The present invention relates to the expansion possibility of housing for power engineering equipment, in particular for transformer stations (hereinafter referred to as transformer station).

State of the art

Transformer stations transform the electricity of the regional distribution network with a voltage of 10 to 36 kV (medium voltage), to the 400/230 volt (low voltage) used in the local network to supply the low-voltage customers. Transformer stations consist essentially of the housing and the energy-related components, namely at least one transformer, regularly supplemented with a medium-voltage switchgear, a transducer, a meter and a low-voltage distribution. Transformer stations are manufactured as fully factory-ready tested units, delivered and commissioned on site after connecting the supply cables. As a rule, they are built as ground-level prefabricated construction stations with very small footprints.

• – DE 10 2010 026 715 B3 beschreibt ein Gehäuse für energietechnische Anlagen mit besonderem Anhebesystem und obere Gehäusekonstruktion ohne Schweißnähte,
• – DE 19854358 C2 beschreibt eine Fundamentwanne für energietechnische Anlagen aus Stahlblech mit einer vom Erdreich abgekoppelter Ölauffangwanne,
• – DE 10 2007 023 992 B3 ist eine Fundamentwanne für energietechnische Anlagen aus Stahlblech dessen besondere Merkmale sich besonders auf die Druckentlastung im Falle eines Störlichtbogens beziehen,
• – DE 19650931 A1 beschreibt eine Verteilungs- und/oder Umspannstation mit mindestens eine Aufnahme, die die Seitenwände des Gehäuses abstützt,
• – DE 196145593A1 beschreibt eine Transportable Raumzelle als Umspannstation aus einem monolithischen Betonguss mit im Dachbereich eingelassener Rinne,

Gehäuse aus Stahlblech sind bekanntermaßen verschweißt und mit einer festen mechanischen Struktur zur Aufnahme der energietechnischen Komponenten und einer öldichten Fundamentwanne bzw. einer Ölaufwangwanne ausgestattet, da die zumeist eingesetzten Transformatoren Isolieröl als Kühlmedium besitzen. Die Teile im Erdreich (Fundament) werden überwiegend nach dem Schweißen Tauchverzinkt und bekommen eine doppelte Beschichtung. Die Ölauffangwanne muss nach der Richtlinie über die Anforderungen an Auffangwannen aus Stahl mit einem Rauminhalt bis 1000 Liter (StawaR), gefertigt werden. Hieraus ergibt sich dass die Ölauffangwanne eine bestimmende Größenordnung für das gesamte Gehäuse vorgibt. Der Einbau eines Transformators der größer ist als die durch der Größenordnung des Gehäuses vorgegebenen Abmessungen ist damit nicht möglich und das Gehäuse in Bezug auf die Leistung des Transformators nicht erweiterbar.There are housings for power engineering systems made of concrete, plastic, aluminum sheet as well as sheet steel. Sheet steel housings have the advantage of high fire resistance compared to plastic housings or aluminum housings. They are very resistant to corrosion due to today's manufacturing possibilities and the use of galvanized sheet steel and a powder coating; The practice here shows a life expectancy of over 30 years. For concrete stations, the housing and the foundation trough consist predominantly of a single cast; They are therefore heavy and limited in their equipment design options. The following documents are known from the prior art:

• - DE 10 2010 026 715 B3 describes a housing for energy systems with special lifting system and upper housing construction without welds,
• - DE 19854358 C2 describes a foundation trough for energy-technological systems made of sheet steel with an oil pan uncoupled from the soil,
• - DE 10 2007 023 992 B3 is a foundation trough for energy systems made of sheet steel whose special features are particularly related to the pressure relief in the event of an arc fault,
• - DE 19650931 A1 describes a distribution and / or substation with at least one receptacle which supports the side walls of the housing,
• - DE 196145593A1 describes a portable space cell as a substation of a monolithic concrete casting with embedded in the roof area gutter,

Housings made of sheet steel are known to be welded and equipped with a solid mechanical structure for holding the power engineering components and an oil-tight foundation trough or an oil pan, since the transformers used mostly have insulating oil as a cooling medium. The parts in the ground (foundation) are mainly dip galvanized after welding and get a double coating. The oil sump must be manufactured in accordance with the Directive on the requirements for steel sumps with a capacity of up to 1000 liters (StawaR). It follows that the oil pan specifies a determining order of magnitude for the entire housing. The installation of a transformer which is greater than the dimensions specified by the size of the housing dimensions is thus not possible and the housing in relation to the performance of the transformer can not be expanded.

Another limitation of the size of prefabricated housings for energy-technical systems is the medium-voltage switchgear. The switchgear is three-way in the normal distribution network area, cable-to-cable transformer. The stipulation DIN EN 62271-202 Ready-to-use stations for high voltage / low voltage (IEC 62271-202), requires an arc fault test for prefabricated enclosures. The test can not be successful without specified technical measures for the discharge of the arc-fault gases. Since with compact housings the derivative invariably leads across the transformer space, this results in a functional unit which is fixed in its order of magnitude and is connected to the oil pan. Each extension leads to uncertainty regarding the validity of the arc fault inspection.

• 1) Die maximal mögliche Leistung des Transformators
• 2) Die Mittelspannungsschaltanlage
• 3) Die Störlichtbogenprüfung und die zu 1) und 2) gehörende Zuordnung der Teile (Ableitung der Störlichtbogengase).

In conclusion, it can be said that the size of the housing for power engineering equipment is determined by:

• 1) The maximum possible power of the transformer
• 2) The medium voltage switchgear
• 3) The arc fault test and the assignment of the parts belonging to 1) and 2) (derivation of the arc fault gases).

These form a base unit which results in a resulting order of magnitude of the low-voltage space and is determined for the entire lifetime of the technical installation.

• 1) Mittelspannungsmessung mit Zählerschrank
• 2) Niederspannungsmessung mit Zählerschrank
• 3) Blindstromkompensation
• 4) Installationen für die Überwachung der Einspeisung regenerativer Energie.
• 5) Installationen für die Netzführung und das steuern im Bereich Smart grids.
• 6) Frequenzumrichter

But there are other interesting functions which a housing for power engineering equipment in addition to transformer, medium-voltage switchgear, the low-voltage main switch and the switchable NH fuses can include:

• 1) Medium voltage measurement with meter cabinet
• 2) Low voltage measurement with meter cabinet
• 3) reactive current compensation
• 4) Installations for the monitoring of the supply of regenerative energy.
• 5) Installations for network management and control in the field of smart grids.
• 6) Frequency converter

The addition or expansion with the mentioned functions requires a completely new housing. The new housing will require additional cabinet arrangements with accessibility.

Presentation of the invention

The present invention is based primarily on the object to provide a housing for energy systems, which eliminates the above limitations, which is based on a housing for energy systems that is factory tested as a base unit, arc-tested and performance-related for the planned supply concept is designed.

Another object of the invention is to allow the expansion options of the housing for power engineering systems constructive, easy to install, both in the planning of the project project as well as subsequently during the service life of the electrical system.

According to the invention the above objects are achieved with the features of claim 1. Advantageous embodiments and solutions to the other objects of the housing according to the invention for energy systems are given in the dependent claims.

Brief description of the drawings

In the drawings show:

1 the entire case 1 as a base unit;

2 the entire case 1 in extended version, in the foundation area without the cover of the front corner 6 and cover the middle part 7 ;

3 the entire case 1 in extended version;

4 the entire case 1 in extended version in the roof area without a roof half 9 ;

Embodiment of the invention

1 shows the case 1 as a base unit in a perspective view in a preferred embodiment. How out 1 can be seen, owns the housing 1 a foundation tub 2 Made of sheet steel, the identically designed lifting bolt with welded lever tabs 3 having.

2 shows the case 1 with the extension construction, above with additional cabinet system 4 , in the area of the foundation tub 2 supplemented with two expansion consoles according to the invention 5 , in the way with the foundation bucket 2 connected to the consoles 5 , on the one hand the extended because of the cabinet extension lifting bolts 3 lead and on the other hand the consoles 5 , The mounting platform are for the rear corner cover 6 , the cover of the middle section 7 and the cover of the front corner 8th , All parts 5 . 6 . 7 . 8th serve as a support surface for the entire cabinet system 4 ,

This creates the extended version of the housing 3 ,

The extension can be done on both sides. The depth of the additional cabinets is freely selectable, depending on the technical needs. The ventilation of the transformer room is carried out by introduced ventilation holes in the doors and panels (not shown).

4 shows the entire extended housing, but lacks a roof half of the roof at the top 9 , You can see the identically designed roof fastening profiles 10 , The roof skin is on these roof fastening profiles 10 riveted. For an extension, the roof profile 10 to extend and the roof skin 9 to make accordingly one-piece or two-piece. The complete unit gets a structurally simple and well sealable roof version.

LIST OF REFERENCE NUMBERS

1

Housing in basic version

2

foundation pit

3

Lifting bolt with lifting lever

4

Additional cabinet system

5

expansion console

6

Cover the rear corner

7

Cover of the middle part

8th

Cover the front corner

9

roof

10

Roof mounting profiles

Claims (3)

Extension of housings for power engineering plants, in particular for Transformer stations consisting of a sheet steel housing ( 1 ) and the power engineering components, namely at least one transformer, regularly supplemented with a medium-voltage switchgear, and a low-voltage distribution, wherein an oil-tight foundation trough ( 2 ) is made of sheet steel and the housing ( 2 ) a lifting function with lifting bolts 3 owns, characterized in that the foundation trough ( 2 ) is supplemented with two expansion consoles 5 , which are connected to the foundation trough ( 2 ), the consoles ( 5 ) on the one hand the extended lifting bolts ( 3 ) and on the other hand the consoles ( 5 ) the mounting platform are for the rear corner cover ( 6 ), the cover of the middle part ( 7 ), the front corner cover ( 8th ) and all parts ( 5 . 6 . 7 . 8th ) as a support surface for the entire cabinet system 4 serve. Housing according to claim 1, characterized in that the consoles ( 5 ) on both longitudinal sides of the foundation trough ( 2 ). Housing according to claims 1 and 2, characterized in that the roof consists of identical Dachbefestigungsprofilen ( 10 ) and a roof skin ( 9 ) which is slipped over and with the roof fastening profiles ( 10 ), wherein the roof skin can be one-piece and two-piece.

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