Superconduction current-limiting circuit and superconduction current-limiting control system and control method

A superconducting current limiting and control system technology, applied in the field of superconducting current limiting, can solve problems such as the inability of resistive superconducting current limiters to meet reclosing requirements and affecting the reliability of power grid operation.

Inactive Publication Date: 2019-06-14
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] This application provides a superconducting current limiting circuit, a superconducting current limiting control system and a control method, which are used to solve the technical problem that the existing resistive superconducting current limiter cannot meet the reclosing requirements and affect the reliability of power grid operation

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  • Superconduction current-limiting circuit and superconduction current-limiting control system and control method
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Embodiment Construction

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0026] For ease of understanding, see figure 1 , the application provides an embodiment of a superconducting current limiting circuit, the superconducting current limiting circuit provided by the embodiment of the application includes: a current limiting unit and a circuit breaker QF; a current limiting unit and a circuit breaker QF in series; a current limiting T...

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Abstract

The invention discloses a superconduction current-limiting circuit and a superconduction current-limiting control system and control method. Two superconduction current-limiting units, three outgoingline units and two changeover switches are used, a breaking and reclosing condition of a circuit breaker QF is combined, the on / off of the changeover switch is controlled, different current-limiting units can be connected to a power grid, so that the reclosing function of the circuit breaker QF is achieved, and the technical problem that the reclosing requirement of an existing resistance-type superconduction current limiter cannot be met to affect running reliability of a power grid is solved.

Description

technical field [0001] The present application relates to the technical field of superconducting current limiting, in particular to a superconducting current limiting circuit, a superconducting current limiting control system and a control method. Background technique [0002] In the process of power grid operation, excessive fault short-circuit current is a problem that needs to be solved urgently. The current limiter is a device that is connected in series in the power grid and displays low resistance under normal conditions. When a short circuit occurs in the power grid and the line current increases to a certain level, the resistance increases to limit the short-circuit current. It is a device for the power grid The stable operation provides strong protection and support. [0003] Resistive superconducting current limiter is a current limiter made using the special characteristics of superconducting materials. Under normal circumstances, the resistance of superconductin...

Claims

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Application Information

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IPC IPC(8): H02H9/02H02H3/087
CPCY02E40/60
Inventor 宋萌李力盛超段新辉史正军赵兵罗运松程文锋夏亚君林友新
Owner GUANGDONG POWER GRID CO LTD
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