Air-core reactors for use with power transmission systems

Patent metadata

Field	Value
Publication number	US-12014870-B2
Application number	US-202217720160-A
Country	US
Kind code	B2
Filing date	Apr 13, 2022
Priority date	Apr 13, 2022
Publication date	Jun 18, 2024
Grant date	Jun 18, 2024

Abstract

Air-core reactors for use with power transmission systems are disclosed. An example air-core reactor may include a main coil and an auxiliary coil. The main coil may include a first solenoid having a first diameter and a second solenoid having a second diameter, wherein the first diameter and the second diameter are different. The auxiliary coil may include a third solenoid. The first solenoid and the second solenoid may be arranged concentrically. The auxiliary coil may also be magnetically coupled to the main coil, and the auxiliary coil may be arranged concentric to the main coil.

First claim

That which is claimed is:

1. An air-core reactor comprising:
a main coil electrically connected to a main circuit of a power transmission system, the main coil comprising:
a first solenoid having a first diameter; and
a second solenoid having a second diameter, wherein the first diameter and the second diameter are different; and

an auxiliary coil comprising a third solenoid,
wherein the auxiliary coil is electrically connected to an auxiliary circuit of the power transmission system,
wherein the main circuit is connected to first devices,
wherein the auxiliary circuit is connected to lower power devices than the first devices,
wherein the first solenoid and the second solenoid are arranged concentrically,
wherein the auxiliary coil is magnetically coupled to the main coil, and
wherein the auxiliary coil is arranged concentric to the main coil.

2. The air-core reactor of claim 1 , wherein the main coil further comprises: a fourth solenoid having a third diameter, wherein the first diameter, the second diameter, and the third diameter are different.

3. The air-core reactor of claim 2 , wherein the first solenoid, the second solenoid, and the fourth solenoid are arranged concentrically.

4. The air-core reactor of claim 1 , wherein the auxiliary circuit comprises a band-pass filter configured to provide harmonic damping to a voltage source converter that is electrically connected to the main circuit of the power transmission system.

5. The air-core reactor of claim 1 , wherein the auxiliary circuit comprises an LC circuit connected across a main circuit breaker.

6. The air-core reactor of claim 1 , wherein the auxiliary coil is electrically isolated from the main coil.

7. The air-core reactor of claim 1 , wherein the lower power devices are electrically isolated from the main coil.

8. A system comprising:
a power transmission system, the power transmission system comprising an air-core reactor comprising:
a main coil electrically connected to a main circuit of a power transmission system, the main coil comprising:
a first solenoid having a first diameter; and
a second solenoid having a second diameter, wherein the first diameter and the second diameter are different; and

an auxiliary coil comprising a third solenoid,
wherein the auxiliary coil is electrically connected to an auxiliary circuit of the power transmission system,
wherein the main circuit is connected to first devices,
wherein the auxiliary circuit is connected to lower power devices than the first devices,
wherein the first solenoid and the second solenoid are arranged concentrically,
wherein the auxiliary coil is magnetically coupled to the main coil, and
wherein the auxiliary coil is arranged concentric to the main coil.

9. The system of claim 8 , wherein the main coil further comprises:
a fourth solenoid having a third diameter, wherein the first diameter, the second diameter, and the third diameter are different.

10. The system of claim 9 , wherein the first solenoid, the second solenoid, and the fourth solenoid are arranged concentrically.

11. The system of claim 8 , wherein the auxiliary circuit comprises a band-pass filter configured to provide harmonic damping to a voltage source converter that is electrically connected to the main circuit of the power transmission system.

12. The system of claim 8 , wherein the auxiliary coil is electrically isolated from the main coil.

13. The system of claim 8 , wherein the lower power devices are electrically isolated from the main coil.

14. A method of implementing an air-core reactor in a power transmission system, comprising:
arranging a first solenoid having a first diameter concentric to a second solenoid having a second diameter;
disposing an auxiliary coil comprising a third solenoid within a main coil,
wherein the main coil comprises the first solenoid and the second solenoid, and
wherein the auxiliary coil is magnetically coupled to the main coil;

electrically connecting the main coil to a main circuit of the power transmission system; and
electrically connecting the auxiliary coil to an auxiliary circuit of the power transmission system,
wherein the auxiliary coil is electrically connected to an auxiliary circuit of the power transmission system,
wherein the main circuit is connected to first devices, and
wherein the auxiliary circuit is connected to lower power devices than the first devices.

15. The method of claim 14 , wherein the main coil further comprises:
a fourth solenoid having a third diameter, wherein the first diameter, the second diameter, and the third diameter are different.

16. The method of claim 15 , wherein the first solenoid, the second solenoid, and the fourth solenoid are arranged concentrically.

17. The method of claim 14 , wherein the auxiliary circuit comprises a band-pass filter configured to provide harmonic damping to a voltage source converter that is electrically connected to the main circuit of the power transmission system.

18. The method of claim 14 , wherein the auxiliary coil is electrically isolated from the main coil.

19. The method of claim 14 , wherein the lower power devices are electrically isolated from the main coil.

Assignees

• General Electric Technology Gmbh
• Ge Infrastructure Technology Llc

Inventors

• Kumar Amit
• Zaninelli Henrique Borges
• Souza Luiz

Classifications

• H01F2007/1692

  Electromagnets or actuators with two coils · CPC title

• H01F27/28

  Coils; Windings; Conductive connections · CPC title

• H01F7/127

  Assembling · CPC title

• H01F7/081

  Magnetic constructions · CPC title

• H01F27/385

  for reducing harmonics · CPC title