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Line fault removing device and direct current system

A line fault, DC system technology, applied in the direction of emergency protection circuit devices, electrical components, etc., can solve the problem of poor working stability of the DC system, and achieve the effect of improving the working stability

Pending Publication Date: 2020-11-27
SHENZHEN POWER SUPPLY BUREAU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Based on this, it is necessary to provide a line fault removal device and a DC system for the problem of poor working stability of the current DC system.

Method used

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  • Line fault removing device and direct current system
  • Line fault removing device and direct current system
  • Line fault removing device and direct current system

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Embodiment Construction

[0061] In order to make the purpose, technical solution and advantages of the present application clearer, a line fault removal device and a DC system of the present application will be further described in detail through the following embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

[0062] The serial numbers assigned to components in this document, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequence or technical meaning. The "connection" and "connection" mentioned in this application all include direct and indirect connection (connection) unless otherwise specified. In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation o...

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Abstract

The invention relates to a line fault removing device and a direct current system. The line fault removing device is provided with current generating equipment. When a short-circuit fault occurs in any branch, the current generating equipment can generate a fault maintaining current, and the fault maintaining current flows into the branch where the short-circuit fault occurs through a direct-current bus so as to maintain the short-circuit current on the fault branch, so that a circuit breaker on the fault branch acts to cut off the short-circuit fault on the branch. According to the embodimentof the invention, by arranging the current generating equipment, the technical problem of poor working stability of a current direct current system in the prior art is solved, and the technical effect of improving the working stability of the direct current system is achieved.

Description

technical field [0001] The present application relates to the technical field of power grid fault safety, in particular to a line fault removal device and a DC system. Background technique [0002] At present, a DC system generally includes a DC bus and various branches, and each branch is generally provided with a converter. With the increasing development of the DC system, the fault protection of the converters in each branch is becoming more and more perfect. The converter can quickly enter the short-circuit protection state in the face of a short-circuit fault. For the sake of insurance, each branch is generally equipped with With a circuit breaker, the short-circuit protection action time of the converter is much shorter than the action time of the circuit breaker. When a short-circuit fault occurs in the branch, the converter stops working, but the circuit breaker has not been disconnected in time, and the fault cannot be eliminated in time. When the DC system is powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26
CPCH02H7/268Y02E60/60
Inventor 赵宇明丁庆艾精文李艳杨加成
Owner SHENZHEN POWER SUPPLY BUREAU
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