Method and system for judging weak line of regional power grid at stable transient power angle

A technology of transient power angle stability and regional power grid, applied in the direction of circuit devices, AC network circuits, electrical components, etc., can solve the problems of complex methods, lack of fault influence, time-consuming and other problems, and achieve the goal of simple and direct methods and saving simulation time Effect

Active Publication Date: 2019-06-07
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

[0002] At present, when looking for weak lines with transient power angle stability in power systems, we are often more concerned about the impact on the system after a system failure occurs. The method of analyzing the impact of a failure mainly uses the simulation method, which is time-consuming. Existing methods for judging weak sections or weak lines The method either lacks analysis of failure effects or the method is more complex

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  • Method and system for judging weak line of regional power grid at stable transient power angle
  • Method and system for judging weak line of regional power grid at stable transient power angle
  • Method and system for judging weak line of regional power grid at stable transient power angle

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[0030] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0031] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...

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Abstract

The invention discloses a method and method for judging a weak line of a regional power grid at a stable transient power angle. Through the initial power flow of the power grid, line fragile factor (LFF) matrixes of different lines of the power grid in a certain region can be calculated via simple information acquisition and matrix operation after different types of faults occur; and the weakest line and the most serious fault of the system at the stable transient power angle can be directly judged through the LFF matrixes. The method is simple and direct, the influence on the weak link of thesystem and other lines on the weak link is clear at a glance, the simulation time can be greatly saved, and the method can be used for various types of analysis of a power system.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and in particular relates to a method and a system for judging weak lines with transient power angle stability in regional power grids. Background technique [0002] At present, when looking for weak lines with transient power angle stability in the power system, we often pay more attention to the impact on the system after the system fails. The method of analyzing the impact of the fault mainly adopts the simulation method, which is time-consuming. The existing judgment of weak sections or weak lines The method either lacks the analysis of failure effects, or the method is relatively complicated. Contents of the invention [0003] The present invention aims to solve one of the technical problems in the related art to a certain extent. [0004] For this reason, the first object of the present invention is to propose a method for judging the weak line of regional grid transient p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00
Inventor 孙玉娇周勤勇张健代倩陈典刘新元施浩波贺海磊张立波赵珊珊吴俊玲覃琴
Owner CHINA ELECTRIC POWER RES INST
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