Method and system for determining broadband oscillation stability of power system based on spectral radius

A power system and spectral radius technology, applied in the direction of reducing/preventing power oscillation, wind power generation, single-net parallel feeding arrangement, etc., can solve problems such as lack of intuition and complex analysis methods

Active Publication Date: 2020-04-21
CHINA ELECTRIC POWER RES INST
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Problems solved by technology

However, most of the current analysis methods are relatively complicated and lack intuition, so it is of great theoretical and practical value to study effective and intuitive methods for judging the stability of DFIG-connected broadband oscillations

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  • Method and system for determining broadband oscillation stability of power system based on spectral radius
  • Method and system for determining broadband oscillation stability of power system based on spectral radius
  • Method and system for determining broadband oscillation stability of power system based on spectral radius

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Embodiment Construction

[0077] 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.

[0078] 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 a system for determining broadband oscillation stability of a power system based on a spectral radius, and belongs to the technical field of power system modeling.The method comprises the steps: obtaining the open-loop frequency characteristic of a power system under the open-loop operation condition of a doubly-fed fan; determining the open-loop frequency characteristic of the doubly-fed fan under an open-loop operation condition; determining an equivalent open-loop process equation of the power system of the doubly-fed fan in a closed-loop operation state according to the open-loop frequency characteristics of the doubly-fed fan in the open-loop operation state; determining a spectral radius function matrix of the power system of the doubly-fed fan in a closed-loop operation state according to the equivalent open-loop process equation; determining matrix elements of the spectral radius function matrix, and generating a spectral radius function curve according to the spectral radius matrix elements; and judging the stability of the broadband oscillation of the power system of the doubly-fed fan in the closed-loop operation state according to the curve characteristics of the spectral radius function. The method and the system can be directly applied to the online analysis platform of the power system and has important engineering application value.

Description

technical field [0001] The present invention relates to the technical field of power system modeling, and more specifically, to a method and system for determining the stability of power system broadband oscillation based on spectral radius. Background technique [0002] New energy power generation represented by wind power and photovoltaic power generation has been widely used in the power system on a large scale. With the continuous increase in the proportion of power electronic power sources such as new energy units, the problem of broadband oscillation caused by the complex interaction of power electronic equipment, traditional equipment, and networks has become increasingly prominent. Studying the analysis method of double-fed fan grid-connected broadband oscillation has important theoretical significance and practical value for effectively solving the existing oscillation problem and ensuring the safe and stable operation of the power system with a high proportion of n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/38
CPCH02J3/24Y02E10/76
Inventor 高磊孙华东郭强褚晓杰徐式蕴易俊宋瑞华郭剑波
Owner CHINA ELECTRIC POWER RES INST
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