Method and system for representing busbar and line voltage stability indexes

A technology for line voltage stability and voltage stability, which is applied in the field of power systems and can solve problems such as complex judgment methods

Inactive Publication Date: 2019-07-02
CHINA ELECTRIC POWER RES INST +3
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Problems solved by technology

Solve the problem of complex judging methods for weak links in voltage stability in power grid security and st...

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  • Method and system for representing busbar and line voltage stability indexes
  • Method and system for representing busbar and line voltage stability indexes
  • Method and system for representing busbar and line voltage stability indexes

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[0037] 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.

[0038] 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 for representing busbar and line voltage stability indexes, characterized by comprising steps of S1, acquiring the offline active power and the offline reactive powerof a buabar and the active power and the reactive power of a line to obtain load active power PL and load reactive power QL; S2, calculating the load active power maximum value PLmax and the reactivepower maximum value QLmax of the busbar and the a line where the busbar is located; S3, obtaining the voltage stable active power and reactive power indexes of the busbar and the line through the loadactive power PL and the load reactive power QL in the S1, and the load active power maximum value PLmax and the reactive power maximum value QLmax in the S2. The index calculation method is simple, can sort the stability of the busbar and line voltage of the system by means of the calculation of the indexes, can understand the voltage stability weak link of the power grid without the need of simulation, and has great significance on the safety and stability analysis of the power grid in terms of voltage stability.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and in particular relates to a method and system for indicating busbar and line voltage stability indicators. Background technique [0002] At present, the judgment on the weak link of voltage stability is mainly based on the analysis of the whole system, the calculation method is relatively complicated, and there are relatively few indicators on the weak busbar and weak line of voltage stability. 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] Therefore, the first object of the present invention is to provide a method for expressing busbar and line voltage stability indicators. To solve the problem of complex judging methods for voltage stability weak links in the analysis of power grid security and stability, and propose weak indicators and methods for judging busbars and line...

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Application Information

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IPC IPC(8): H02J3/00H02J3/06
CPCH02J3/00H02J3/06
Inventor 孙玉娇周勤勇张一驰高骞王荃荃代倩张文嘉邵瑶蔡晖云雷赵菲菲贺海磊王虹富
Owner CHINA ELECTRIC POWER RES INST
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