Flexible voltage transformation system

Patent metadata

Field	Value
Publication number	US-10483032-B2
Application number	US-201815961413-A
Country	US
Kind code	B2
Filing date	Apr 24, 2018
Priority date	Apr 24, 2017
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

Unique systems, methods, techniques and apparatuses of a modular power transformer are disclosed. One exemplary embodiment is a matrix power transformer including a plurality of block assemblies each including a plurality of transformer modules, each transformer module including a primary winding coupled to an input and a secondary winding coupled to an output, the inputs of each transformer module in one block assembly being coupled together and the outputs of each transformer block being coupled together. One of the secondary windings includes a plurality of taps structured to be selectively coupled to the output of the associated transformer module assembly or another secondary winding of the associated module assembly.

First claim

What is claimed is:

1. A matrix power transformer system comprising:
a plurality of block assemblies each including a plurality of transformer modules, each transformer module including a primary winding coupled to an input and a secondary winding coupled to an output, the inputs of each transformer module in one block assembly being coupled together and the outputs of each transformer block being coupled together,
wherein one of the secondary windings includes a plurality of taps structured to be selectively coupled to the output of the associated transformer module or another secondary winding of the associated transformer module,
wherein each block assembly is structured to weigh less than 40tons, and
wherein the matrix power transformer system has a power rating greater than 100 megavolt amperes (MVA), and
wherein at least one of the transformer modules includes the first primary winding, a second primary winding, a third primary winding, a fourth primary winding, the first secondary winding, a second secondary winding, a third secondary winding, and a fourth secondary winding, wherein the voltage ratio of the first primary winding to the second primary winding to the third primary winding to the fourth primary winding is 5:1:1:5, and wherein the voltage ratio of the first secondary winding to the second secondary winding to the third secondary winding to the fourth secondary winding is 5:1:1:5.

2. The matrix power transformer system of claim 1 , wherein each transformer module includes a plurality of primary windings coupled in series or in parallel, and wherein each transformer module includes a plurality of second windings coupled in series or in parallel.

3. The matrix power transformer system of claim 2 , wherein each input includes two input terminals, each input terminal being coupled to at least one terminal of another transformer module assembly, and wherein each output includes two output terminals, each output terminal being coupled to at least one terminal of another transformer module assembly.

4. The matrix power transformer system of claim 3 , wherein the plurality of transformer modules assemblies includes a first set of transformer module assemblies with inputs coupled in series and a second set of transformer module assemblies with inputs coupled in series, and wherein the first set of transformer module assemblies and the second set of transformer module assemblies are coupled in parallel.

5. The matrix power transformer system of claim 1 , wherein each block assembly is structured to be enclosed by a tank.

6. The matrix power transformer system of claim 5 , wherein the tank is structured to fit within an enclosure measuring 40 feet by eight feet by eight feet, six inches.

7. A modular power transformer having a power rating greater than 100 MVA comprising:
a plurality of transformer blocks each including:
an enclosure,
a first set of block terminals,
a second set of block terminals, and
a plurality of transformer modules located within the enclosure, each module including:
a first set of module terminals,
a second set of module terminals,
at least one primary winding coupled to the first set of module terminals,
at least one secondary winding coupled to the second set of module terminals, and
a transformer core,

wherein the primary windings of the transformer modules in one transformer block are coupled together between the first set of block terminals and the secondary windings of the transformer modules in the same transformer block are coupled together between the second set of block terminals and
wherein at least one of the transformer modules includes the first primary winding, a second primary winding, a third primary winding, a fourth primary winding, the first secondary winding, a second secondary winding, a third secondary winding, and a fourth secondary winding, wherein the voltage ratio of the first primary winding to the second primary winding to the third primary winding to the fourth primary winding is 5:1:1:5, and wherein the voltage ratio of the first secondary winding to the second secondary winding to the third secondary winding to the fourth secondary winding is 5:1:1:5.

8. The modular power transformer of claim 7 , wherein each transformer block weighs less than or equal to 40 tons.

9. The modular power transformer of claim 7 , wherein the primary windings of the transformer modules in one transformer block are coupled together in parallel, in series, or a combination thereof.

10. The modular power transformer of claim 7 , wherein at least another one of the transformer modules includes the first primary winding, a second primary winding, a third primary winding, a fourth primary winding, the first secondary winding, and a second secondary winding, wherein the voltage ratio of the first primary winding to the second primary winding to the third primary winding to the fourth primary winding is 5:1:1:5, and wherein the voltage ratio of the first secondary winding to the second secondary winding is 1:1.

11. The modular power transformer of claim 7 , wherein at least another one of the transformer modules includes the first primary winding, a second primary winding, a third primary winding, a fourth primary winding, and the secondary winding, wherein the voltage ratio of the first primary winding to the second primary winding to the third primary winding to the fourth primary winding is 5:1:1:5.

12. The modular power transformer of claim 7 , wherein at least another one of the transformer modules includes the first primary winding, a second primary winding, a third primary winding, a fourth primary winding, a fifth primary winding, a sixth primary winding, the first secondary winding, a second secondary winding, a third secondary winding, a fourth secondary winding, a fifth secondary winding, and a sixth secondary winding, wherein the voltage ratio of the first primary winding to the second primary winding to the third primary winding to the fourth primary winding to the fifth primary winding to the sixth primary winding is 1:1:1:1:1:1, and wherein the voltage ratio of the. first secondary winding to the second secondary winding to the third secondary winding to the fourth secondary winding to the fifth secondary winding to the sixth secondary winding is 1:1:1:1:1:1.

13. The modular power transformer of claim 7 , wherein at least another one of the transformer modules includes the first primary winding, a second primary winding, a third primary winding, a fourth primary winding, a fifth primary winding, a sixth primary winding, the first secondary winding, and a second secondary winding, wherein the voltage ratio of the first primary winding to the second primary winding to the third primary winding to the fourth primary winding to the fifth primary winding to the sixth primary winding is 1:1:1:1:1:1, and wherein the voltage ratio of the first secondary winding to the second secondary winding is 1:1.

14. The modular power transformer of claim 7 , wherein at least another one of the transformer modules includes the first primary winding, a second primary winding, a third primary winding, a fourth primary winding, a fifth primary winding, a sixth primary winding, and the first secondary winding, wherein the voltage ratio of the first primary winding to the second primary winding to the third primary winding to the fourth primary winding to the fifth primary winding to the sixth primary winding is 1:1:1:1:1:1.

15. The modular power transformer of claim 7 , wherein one or more of the plurality of blocks includes a flexible impedance or flexible voltage module.

Assignees

• Abb Schweiz Ag

Inventors

• Prieto Alberto
• Radu Ion C
• Zant Nikolaus
• Bala Sandeep
• Henriksen Matthew Lee
• Upadhyay Parag

Classifications

• H02M5/225 Primary

  comprising two stages of AC-AC conversion, e.g. having a high frequency intermediate link · CPC title

• G05F1/14

  using tap transformers or tap changing inductors as final control devices · CPC title

• G05F1/20

  semiconductor devices only · CPC title

• H01F29/02 Primary

  with tappings on coil or winding; with provision for rearrangement or interconnection of windings · CPC title

• G05F1/16

  combined with discharge tubes or semiconductor devices · CPC title