Replacement transformer with modular construction

Patent metadata

Field	Value
Publication number	US-10460866-B2
Application number	US-201615159350-A
Country	US
Kind code	B2
Filing date	May 19, 2016
Priority date	Apr 29, 2016
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

A configuration for the rapid replacement of a faulty multiphase transformer includes a plurality of single-phase transformers each of which has a housing filled with an insulating fluid and in which a core having a higher-voltage and a lower-voltage winding is disposed. At least one bushing socket is connected by a winding connection lead extending within the housing to the higher-voltage or lower-voltage winding. At least one high-voltage feed-through or bushing can be inserted into the bushing socket and a cooling module, which can be detachably connected to the housing and is filled with insulating fluid, cools the insulating fluid.

First claim

The invention claimed is:

1. A configuration for replacing a multiphase transformer, the configuration comprising:
a plurality of single-phase transformers each including a housing filled with an insulating fluid and a core having a higher-voltage and a lower-voltage winding disposed in said housing;
at least one bushing socket connected by a winding connection lead extending within said housing to said higher-voltage or lower-voltage winding, said at least one bushing socket connected to the winding connection lead at an end adjacent to the insulating fluid;
at least one high-voltage bushing being insertable into said at least one bushing socket, said bushing socket being complementary in shape to an insertion end of the high-voltage bushings; and
a cooling module for cooling the insulating fluid, the cooling module detachably connected to said housing and being filled with the insulating fluid, said cooling module configured to hold said insulating fluid in said cooling module even when said cooling module is detached from said housing.

2. The configuration according to claim 1 , wherein both of said housing and said cooling module have at least one cooling fluid inlet and at least one cooling fluid outlet to be connected to one another for an exchange of insulating fluid, and said at least one cooling fluid outlet and said at least one cooling fluid inlet each being equipped with a respective fluid-tight closing valve.

3. The configuration according to claim 2 , which further comprises an intermediate piece for a fluid-tight connection of said at least one cooling fluid outlet and said at least one cooling fluid inlet, said intermediate piece delimiting a connecting channel and having a bleed opening for bleeding said connecting channel.

4. The configuration according to claim 1 , which further comprises:
a holding frame being separate from said housing;
an expansion tank disposed on said holding frame; and
a connection for connecting said expansion tank to said housing for an exchange of insulating fluid.

5. The configuration according to claim 4 , wherein said holding frame is configured to hold said expansion tank above said cooling module being detachably connected to said housing.

6. The configuration according to claim 1 , which further comprises a plurality of auxiliary current modules each having a respective auxiliary transformer disposed therein for producing a supply power, said auxiliary current modules each configured to be connected to a respective one of said single-phase transformers.

7. The configuration according to claim 6 , wherein said cooling module is one of a plurality of cooling modules each being equipped with a respective fan and each being configured to be connected to a respective one of said plurality of auxiliary current modules.

8. The configuration according to claim 1 , wherein said at least one bushing socket includes at least three bushing sockets.

9. The configuration according to claim 1 , wherein each said winding connection lead is equipped with a respective current transformer.

10. The configuration according to claim 1 , wherein:
said at least one bushing socket includes a plurality of bushing sockets;
said housing has cable outlets;
a selection device is disposed in said housing, said selection device has a plurality of voltage terminals each being connected to a respective one of said bushing sockets, a respective one of said cable outlets or a respective one of said windings;
said housing has at least one closable setting opening formed therein allowing access to said selection device; and
a switchover unit for selectively connecting two of said voltage terminals to one another.

11. The configuration according to claim 10 , wherein:
said at least one closable setting opening includes an input setting opening and an output setting opening;
said selection device is one of two selection devices;
one of said selection devices is adjacent said input setting opening and is connected to said higher-voltage winding and to at least two of said bushing sockets; and
another of said selection devices is adjacent said output setting opening and is connected to said lower-voltage winding, to at least one of said bushing sockets and to one or each of said cable outlets.

12. The configuration according to claim 1 , wherein:
said at least one high-voltage bushing includes a plurality of high-voltage bushings;
each of said high-voltage bushings is equipped with a respective fastening connection for mounting on said housing, each high-voltage bushing additionally including a column section extending from said respective fastening connection;
each said column has a length of at least three meters and each has a respective free end facing away from said respective fastening connection; and
high-voltage terminals are each disposed at a respective one of said free ends.

13. The configuration according to claim 1 , which further comprises at least one cable connection configured to connect to a cable conductor.

14. A configuration for replacing a multiphase transformer, the configuration comprising:
a plurality of single-phase transformers each including a housing filled with an insulating fluid and a core having a higher-voltage and a lower-voltage winding disposed in said housing;
at least one bushing socket connected by a winding connection lead extending within said housing to said higher-voltage or lower-voltage winding, said at least one bushing socket connected to the winding connection lead at an end adjacent to the insulating fluid;
at least one high-voltage bushing being insertable into said at least one bushing socket, said bushing socket being complementary in shape to an insertion end of the high-voltage bushings, said at least one high-voltage bushing being configured for use with a voltage range of over 245 kV; and
a cooling module for cooling the insulating fluid, the cooling module detachably connected to said housing and being filled with the insulating fluid, said cooling configured to hold said insulating fluid in said cooling module even when said cooling module is detached from said housing.

Assignees

• Siemens Ag

Inventors

• Ettl Christian

Classifications

• H01F30/10

  Single-phase transformers (H01F30/16 takes precedence) · CPC title

• H01F27/12 Primary

  Oil cooling · CPC title

• H01F27/002

  Arrangements provided on the transformer facilitating its transport · CPC title

• H01F27/04

  Leading of conductors or axles through casings, e.g. for tap-changing arrangements · CPC title

• H01F27/29

  Terminals; Tapping arrangements {for signal inductances} · CPC title