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Short-circuit current sinking branch switch-out control method and device based on overcurrent protection

A technology of short-circuit current and control method, which is applied to emergency protection circuit devices, emergency protection devices with automatic disconnection, circuit devices, etc., and can solve the problems that short-circuit current measures cannot be withdrawn in time

Active Publication Date: 2019-07-02
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention provides a short-circuit current consumption branch exit control method and device based on overcurrent protection, so as to solve the problem that current measures taken for excessive short-circuit current cannot exit in time

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  • Short-circuit current sinking branch switch-out control method and device based on overcurrent protection
  • Short-circuit current sinking branch switch-out control method and device based on overcurrent protection
  • Short-circuit current sinking branch switch-out control method and device based on overcurrent protection

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Embodiment Construction

[0039] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.

[0040] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...

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Abstract

The invention provides a short-circuit current sinking branch switch-out control method and device based on overcurrent protection. The short-circuit current sinking branch switch-out control method based on overcurrent protection provided by the invention comprises steps of: generating a short-circuit current sinking branch switch-out instruction according to a first current in a short-circuit current sinking branch acquired at the first time, and / or a second current in the short-circuit current sinking branch acquired at the second time; switching the short-circuit current sinking branch outof a grid in response to the short-circuit current sinking branch switch-out instruction, wherein the short-circuit current sinking branch is a shunting branch connected in parallel with a busbar, and is controllably switched into or out of the grid. The method provided by the invention can timely switch the short-circuit current sinking branch out of a power system after the short-circuit faultin the power system is isolated, in order to restore the system to a normal state as soon as possible.

Description

technical field [0001] The invention belongs to the field of power system safety and stability control, and relates to a method and device for exit control of a short-circuit current consumption branch based on overcurrent protection. Background technique [0002] With the continuous expansion of the scale of the power system, the implementation of networking planning and the gradual strengthening of the power grid, the level of short-circuit current in the power system is increasing year by year. At present, the phenomenon of excessive short-circuit current level in my country's secondary voltage power grid is relatively common, and has become an important problem faced by power grid planning and operation. The problem of short-circuit current in some areas has become a key factor in determining the planning scheme and operation mode of the power grid. [0003] At present, in the operation stage of the power grid, measures to limit short-circuit current, such as pulling wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/02H02H7/26
CPCH02H3/025H02H7/262Y02E60/00
Inventor 赵兵孙华东王姗姗郭强王志文贾天下王铁柱徐式蕴卜广全李英彪
Owner CHINA ELECTRIC POWER RES INST
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