Fault current limiter

Patent metadata

Field	Value
Publication number	US-10651646-B2
Application number	US-201715622051-A
Country	US
Kind code	B2
Filing date	Jun 13, 2017
Priority date	Feb 27, 2017
Publication date	May 12, 2020
Grant date	May 12, 2020

Abstract

A fault current limiter, including: two inductors, a direct current circuit breaker, a shunt resistor, a first fixed resistor, and metal oxide arresters. The two inductors include wound superconducting wires. The inductors have identical number of windings and identical structure. Magnetic fluxes of the inductors are forward coupled, and the inductors are connected in parallel to form a superconducting inductor structure. The direct current circuit breaker and the superconducting inductor structure are connected in series to form a series branch. The shunt resistor is connected in parallel to the series branch. The first fixed resistor is connected in parallel to the direct current circuit breaker. The metal oxide arresters are two in number, and are connected to two ends of the inductors in parallel.

First claim

The invention claimed is:

1. A fault current limiter, comprising:
two inductors;
a direct current circuit breaker;
a shunt resistor;
a first fixed resistor;
a first metal oxide arrester; and
a second metal oxide arrester;

wherein
the two inductors comprise wound superconducting wires; the two inductors have identical number of windings and identical structure; magnetic fluxes of the two inductors are forward coupled, and the two inductors are connected in parallel to form a superconducting inductor structure;
the direct current circuit breaker and the superconducting inductor structure are connected in series to form a series branch;
the shunt resistor is connected in parallel to the series branch;
the first fixed resistor is connected in parallel to the direct current circuit breaker;
two terminals of the first metal oxide arrester are respectively connected to two terminals of a first one of the two inductors; and
two terminals of the second metal oxide arrester are respectively connected to two terminals of a second one of the two inductors.

2. The fault current limiter of claim 1 , wherein the shunt resistor is a second fixed resistor.

3. The fault current limiter of claim 1 , wherein the two inductors are in a superconducting state when the fault current limiter is in use.

4. The fault current limiter of claim 2 , wherein the two inductors are in a superconducting state when the fault current limiter is in use.

5. The fault current limiter of claim 3 , wherein the fault current limiter is disposed at a head or a tail of a direct current transmission line.

6. The fault current limiter of claim 4 , wherein the fault current limiter is disposed at a head or a tail of a direct current transmission line.

7. The fault current limiter of claim 5 , wherein the inductors are a hollow structure or comprise an iron core.

8. The fault current limiter of claim 6 , wherein the inductors are a hollow structure or comprise an iron core.

Assignees

• Univ Huazhong Science Tech

Inventors

• Ren Li
• Liang Siyuan
• Tang Yuejin
• Xu Ying
• Xia Zhong
• Wang Zuoshuai
• Shi Jing
• Li Jingdong
• Zhang Lihui
• Yan Sinian
• Yang Zhangwei
• Zhang Yi

Classifications

• H01F1/00

  Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties · CPC title

• H01F38/023

  of inductances · CPC title

• H02H7/001

  for superconducting apparatus, e.g. coils, lines, machines · CPC title

• H01H33/596

  for interrupting DC · CPC title

• H01H9/547

  Combinations of mechanical switches and static switches, the latter being controlled by the former · CPC title