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Method and system for dynamically adjusting short-circuit current based on power transmission system topology

A power transmission system, dynamic adjustment technology, applied in emergency protection circuit devices for limiting overcurrent/overvoltage, protection and circuit devices that react to overcurrent, etc., can solve problems such as adjusting short-circuit current

Pending Publication Date: 2020-05-19
CHINA ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical solution of the present invention provides a method and system for dynamically adjusting short-circuit current based on the topology of the power transmission system to solve the problem of how to dynamically adjust the short-circuit current based on the topology of the power transmission system

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  • Method and system for dynamically adjusting short-circuit current based on power transmission system topology
  • Method and system for dynamically adjusting short-circuit current based on power transmission system topology
  • Method and system for dynamically adjusting short-circuit current based on power transmission system topology

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Embodiment Construction

[0036] 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.

[0037] 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 discloses a method and system for dynamically adjusting short-circuit current based on power transmission system topology, and the method comprises the steps: carrying out real-time detection on the current of a current-limiting switch, and obtaining a current value of the current-limiting switch; detecting the current of a plurality of circuit breakers of a bus in the protection range in real time, and obtaining current values of the plurality of circuit breakers; when the current value of the current-limiting switch exceeds a preset first threshold value, disconnecting the current-limiting switch; or when the sum of the current values of the plurality of circuit breakers exceeds a preset second threshold value, disconnecting the current-limiting switch; and when the current-limiting switch is switched off for a period more than a preset time, cutting off the fault through a circuit breaker.

Description

technical field [0001] The present invention relates to the technical field of short-circuit current control in power systems, and more specifically, to a method and system for dynamically adjusting short-circuit current based on the topology of a power transmission system. Background technique [0002] With the rapid development of the power grid, the scale of the power grid is increasing day by day, and the level of short-circuit current in my country's power system is increasing year by year. Excessive short-circuit current will endanger the safe and stable operation of the power system and the electrical equipment itself. In order to ensure the safe operation of the power system, it is necessary to strengthen or replace the electrical equipment in the power grid to solve the problems caused by the excessive short-circuit current. On the one hand, this will lead to a substantial increase in the investment and technical requirements of the electrical equipment in the syste...

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Application Information

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IPC IPC(8): H02H3/08H02H7/22H02H9/02H02H7/26
CPCH02H3/08H02H7/22H02H9/02H02H7/26
Inventor 韩彬陈维江金玉琪常乃超朱炳铨项祖涛叶琳张静陈晓刚韩奕赵泽昕余越
Owner CHINA ELECTRIC POWER RES INST
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