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Controllable lightning arrester and method and system for reducing operating overvoltage

A technology for operating overvoltage and lightning arresters, applied in the field of electric power, can solve problems such as poor system reliability and high insulation level, achieve the effects of reducing insulation level, improving system reliability, and solving high insulation level

Pending Publication Date: 2022-02-08
GUANGDONG POWER GRID CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The application provides a controllable lightning arrester and a method and system for reducing the operating overvoltage, which are used to solve the technical problems in the prior art that require the system to have a high insulation level and poor system reliability

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  • Controllable lightning arrester and method and system for reducing operating overvoltage

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Embodiment Construction

[0029] 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.

[0030] see figure 1 , figure 1 It is a schematic structural diagram of a controllable arrester provided in the embodiment of this application.

[0031] A controllable lightning arrester provided by an embodiment of the present application includes: a lightning arrester body composed of a controlled element and a fixed element, and a controllable switch; the contr...

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Abstract

The invention discloses a controllable lightning arrester and a method and a system for reducing operating overvoltage, and aims to provide improvement measures for the residual voltage problem of the lightning arrester, replace the lightning arrester in a direct current circuit breaker with the controllable lightning arrester, and dynamically change the volt-ampere characteristic of the lightning arrester, thereby reducing the residual voltage of the lightning arrester in the direct current circuit breaker. The controllable lightning arrester is composed of a lightning arrester body and a controllable switch, wherein the lightning arrester body is composed of a controlled element and a fixed element. The controlled element and the fixed element are connected in series, and the controllable switch is connected to two ends of the controlled element in parallel. The direct-current circuit breaker formed by the controllable lightning arrester is applied to a flexible direct-current power distribution network, the insulation level of a system can be reduced, and the reliability of the system is improved. Therefore, the technical problems that in the prior art, the insulation level of a system is required to be high, and the reliability of the system is poor are solved.

Description

technical field [0001] The application relates to the field of electric power technology, in particular to a controllable lightning arrester and a method for reducing operating overvoltage. Background technique [0002] In recent years, flexible DC transmission based on voltage source converters has become a solution due to its advantages of high power quality, decoupling control of active and reactive power, no commutation failure, power supply to passive systems, and small footprint. Important technical means for large-scale grid integration of renewable energy and island power transmission have received widespread attention and become one of the important directions for the development of power systems. The DC circuit breaker can cut off the short-circuit current within milliseconds, avoiding the outage of the entire flexible DC system due to faults, which is very important in the flexible DC transmission system. [0003] When a short-circuit fault occurs on the line sid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04H02H9/06H01C7/12
CPCH02H9/04H02H9/06H01C7/12
Inventor 赵紫辉杨昆陈建福李建标刘尧钱利宏郭晓燕向真刘超
Owner GUANGDONG POWER GRID CO LTD
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