Static electric induction arrangement

Patent metadata

Field	Value
Publication number	US-11908602-B2
Application number	US-202118015165-A
Country	US
Kind code	B2
Filing date	Jun 29, 2021
Priority date	Jul 13, 2020
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

Provided is a static electric induction arrangement including: a static electric induction device arranged in a static electric induction device tank; an accessory tank including at least one opening configured to receive an accessory therein; the static electric induction device tank and the accessory tank are intended to be filled with dielectric fluid and are connected via a fluid connection, an upper portion of a cross section of the fluid connection, is located at a first height, the arrangement comprises a heat exchanger connected to the device tank, the device tank includes an outlet that is arranged to lead the dielectric fluid to the heat exchanger and an inlet that is arranged to return the dielectric fluid from the heat exchanger.

First claim

The invention claimed is:

1. A static electric induction arrangement comprising:
a static electric induction device tank comprising a top part, a bottom part and at least one wall extending between the top part and the bottom part, which is for accommodating a dielectric fluid;
an accessory;
an accessory tank comprising a top part, a bottom part and at least one wall extending between the top part and the bottom part, which is for accommodating the dielectric fluid, the accessory tank further comprising at least one opening arranged in the top part of the accessory tank to receive the accessory therein;
a fluid connection part for accommodating the dielectric fluid;
a heat exchanger for accommodating the dielectric fluid;
an outlet for accommodating the dielectric fluid; and
an inlet for accommodating the dielectric fluid;
a static electric induction device arranged in the static electric induction device tank,
wherein the static electric induction device tank is in fluid connection with the accessory tank via the fluid connection part,
wherein an upper portion of the fluid connection part, with respect to the bottom part of the static electric induction device tank in a vertical direction of the static electric induction arrangement, is located at a first height,
wherein the heat exchanger is in fluid connection with the static electric induction device tank via the outlet and the inlet,
wherein the outlet is arranged to lead the dielectric fluid from the static electric induction device tank to the heat exchanger,
wherein the inlet is arranged to return the dielectric fluid from the heat exchanger to the static electric induction device tank,
wherein a top part of a section of the inlet adjacent to the static electric induction device tank, with respect to the bottom part of the static electric induction device tank in the vertical direction, is located at a second height the same as or larger than the first height,
wherein a top part of a section of the outlet adjacent to the static electric induction device tank, with respect to the bottom part of the static electric induction device tank in the vertical direction, is located at a third height larger than the second height,
wherein the top part of the static electric induction device tank, with respect to the bottom part of the static electric induction device tank in the vertical direction, is located at a fourth height larger than the third height,
wherein a top part of the heat exchanger, with respect to the bottom part of the static electric induction device tank in the vertical direction, is located at a fifth height larger than the fourth height, and
wherein the static electric induction device comprises an insulation material, wherein the insulation material, with respect to the bottom part of the static electric induction device tank in the vertical direction, is located at a sixth height, and wherein the at least one opening, with respect to the bottom part of the static electric induction device tank in the vertical direction, is located at a seventh height larger than the sixth height.

2. The static electric induction arrangement according to claim 1 , wherein the static electric induction device further comprises another insulation material, and wherein the another insulation material, with respect to the bottom part of the static electric induction device tank in the vertical direction, is located at an eighth height smaller than the sixth height.

3. The static electric induction arrangement according to claim 1 , wherein the accessory is releasably arranged in the at least one opening.

4. The static electric induction arrangement according to claim 1 , further comprising a partial barrier arranged in or at the fluid connection part for at least partly preventing dielectric fluid from flowing from the static electric induction device tank through the fluid connection into the accessory tank.

5. The static electric induction arrangement according to claim 1 , further comprising fins or ribs arranged on an outside of the accessory tank.

6. The static electric induction arrangement according to claim 1 , further comprising an additional heat exchanger in fluid connection with the accessory tank.

7. The static electric induction arrangement according to claim 1 , further comprising a heat barrier arranged on an outside of the static electric induction device tank or on an outside of the accessory tank between the static electric induction device tank and the accessory tank, wherein the heat barrier is made of a thermally insulating material or a heat radiation hindering material.

8. The static electric induction arrangement according to claim 1 , wherein the accessory is a tap changer, a current transformer, a cable termination, a bushing, a plug-in bushing, a dry bushing, or an oil-filled bushing.

9. The static electric induction arrangement according to claim 1 , wherein the accessory is connected to a cable box or a GIS connection.

10. The static electric induction arrangement according to claim 1 , wherein the dielectric fluid comprises a high temperature liquid, wherein the high temperature liquid has a flash point temperature which is >160° C., >190° C. or >250° C., and wherein the high temperature liquid is chosen from mineral oil, natural ester, synthetic ester and isoparaffinic liquid.

11. The static electric induction arrangement according to claim 1 , wherein when the static electric induction device is in use, the dielectric fluid is circulated by natural convection.

12. The static electric induction arrangement according to claim 1 , further comprising a pump arranged in the heat exchanger, wherein when the static electric induction device is in use, the dielectric fluid is circulated by the pump.

13. An application of the static electric induction arrangement according to claim 1 , wherein the application is one of offshore energy systems, mobile emergency power transformers systems, renewable energy systems, solar energy systems, and onshore wind systems.

Assignees

• Hitachi Energy Ltd

Inventors

• Lavesson Nils
• Laneryd Tor
• Czyzewski Jan
• Dahlgren Johan
• Seier Sebastian

Classifications

• H01F27/025 Primary

  Constructional details relating to cooling · CPC title

• H01F27/105

  Cooling by special liquid or by liquid of particular composition · CPC title

• H01F27/12

  Oil cooling · CPC title