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Method for quantitatively evaluating transient stability of electric power system based on network measuring information

A transient stability and power system technology, applied in the direction of reducing/preventing power oscillation, etc., can solve difficulties, generator motion information depends on fast transient stability analysis and control implementability, etc., to achieve accurate results, Improve the effect of relying on model accuracy and slow calculation speed

Inactive Publication Date: 2011-09-14
NORTHEAST DIANLI UNIVERSITY
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Problems solved by technology

Although the research in this field has made great progress, how to overcome the current transient stability quantitative analysis method based on the inertial center coordinate system and rely too much on the generator motion information to provide rapid transient stability analysis and control Difficulties posed by implementability, revealing the physical nature of network local influence on system transient stability is still an unresolved problem

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  • Method for quantitatively evaluating transient stability of electric power system based on network measuring information
  • Method for quantitatively evaluating transient stability of electric power system based on network measuring information
  • Method for quantitatively evaluating transient stability of electric power system based on network measuring information

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Embodiment Construction

[0024] The power system transient stability quantitative evaluation method based on network measurement information of the present invention comprises the following steps:

[0025] 1) Construction of transient energy function based on power system structure preservation model:

[0026] V = 1 2 Σ i = 1 m M i ω i 2 + Σ k = 1 l ∫ σ k 0 σ k [ P k ( u ) - P k s ] du + Σ k = ...

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Abstract

The invention discloses a method for quantitatively evaluating the transient stability of an electric power system based on network measuring information. The method is characterized by comprising the following steps of: constructing a transient energy function based on a structure preserving model of the electric power system; constructing a transient potential energy function of a branch circuit; and constructing an evaluation index of the transient stability of the electric power system by using the potential energy of the branch circuit. Due to the adoption of the method, the transient stability of the system can be analyzed quantitatively, the influence of the branch circuit in a network on the transient stability of the system is evaluated and weak links in the network can be found. Compared with the conventional method, the method has the advantages of capability of realizing quantitative evaluation of the transient stability of the electric power system by using the network measuring information independent of a generator model and information, simplicity in computation, accurate result, easiness for realization, high engineering application value and the like.

Description

technical field [0001] The invention relates to the technical field of power system stability and control, and relates to a quantitative evaluation method for power system transient stability based on network measurement information. Background technique [0002] The transient stability of the power system refers to the state of the system reaching an acceptable operating point after the disturbance is over for a certain initial operating point such as short circuit, reclosing fault, cut-off line and generator, and a specified disturbance. , the operating point of the system is transiently stable under the specified disturbance; otherwise, the system is transiently unstable. Once the power system loses its transient stability, it will cause large-scale power outages at the least, and the collapse of the system at the worst, which will undoubtedly be a disaster for the power system and even social life. Therefore, to accurately analyze the transient stability behavior of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24
Inventor 蔡国伟杨德友章昊孔令国
Owner NORTHEAST DIANLI UNIVERSITY
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