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Short-circuit current consuming branch switching-off control method and device based on state response

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with automatic disconnection, etc., and can solve the problems that short-circuit current fault measures cannot be withdrawn in time

Active Publication Date: 2019-06-28
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
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  • 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 state response characteristics, so as to solve the problem that the current fault measures taken for excessive short-circuit current cannot exit in time

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  • Short-circuit current consuming branch switching-off control method and device based on state response
  • Short-circuit current consuming branch switching-off control method and device based on state response
  • Short-circuit current consuming branch switching-off control method and device based on state response

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Embodiment Construction

[0049] 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.

[0050] 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 consuming branch switching-off control method and device based on state response. The method provided by the invention comprises steps of generating a short-circuit current consuming branch switching-off instruction when detecting that the on / off state signal of any branch connected to a busbar is in an on state at a first time and detecting that theon / off state signal of any branch is in an off state at a second time in a power system where the short-circuit current is required to be controlled in real time; and removing the short-circuit current consuming branch from the power grid in response to the short-circuit current consuming branch switching-off instruction. The method provided by the invention can timely remove the short-circuit current consuming branch from the power system after the short-circuit fault in the power system is isolated, so that the system can restore to the 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 absorption branch based on state response characteristics. Background technique [0002] As the scale of my country's power grid continues to expand and the grid structure becomes denser, the short-circuit current level of the system also rises sharply. If the short-circuit current exceeds the interrupting capability of the protection switch, the protection switch will not be able to cut off the short-circuit current and fail to isolate the fault, which will further lead to serious accidents such as burning of lines and equipment, and destruction of system stability. Therefore, effective measures must be taken to effectively reduce the short-circuit current level. [0003] Common methods now include optimizing grid structure, pulling and stopping lines, and installing fault current limiters. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/02H02H3/08H02H7/26
Inventor 孙华东王姗姗郭强赵兵王铁柱王志文贾天下徐式蕴卜广全李英彪
Owner CHINA ELECTRIC POWER RES INST
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