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Method and device for evaluating stability of high-proportion power electronic power system

A power electronic power supply, power electronics technology, applied in the direction of instruments, data processing applications, resources, etc., to achieve the effect of easy promotion, effective discrimination and quantification

Active Publication Date: 2021-10-19
CHINA ELECTRIC POWER RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical solution of the present invention provides a method and system for determining the stability of a high-proportion power electronic power system to solve the problem of how to evaluate the stability of a high-proportion power electronic power system

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  • Method and device for evaluating stability of high-proportion power electronic power system
  • Method and device for evaluating stability of high-proportion power electronic power system
  • Method and device for evaluating stability of high-proportion power electronic power system

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Embodiment Construction

[0085] 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.

[0086]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 overl...

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Abstract

The invention discloses a method and a device for evaluating the stability of a high-proportion power electronic power system. The method comprises the following steps: acquiring a closed-loop transfer function matrix of the high-proportion power electronic power system, a transfer function matrix of a power electronic power station and an interaction matrix of the high-proportion power electronic power system; calculating a uniformity stability criterion matrix of each station based on the closed-loop transfer function matrix of the high-proportion power electronic power system and the transfer function matrix of the power electronic power station, and determining the safety stability of each power electronic power station based on the uniformity stability criterion matrix; calculating a relative gain matrix of the high-proportion power electronic power system based on the interaction matrix, and determining the interaction degree between power electronic power stations in the power system based on the relative gain matrix; and calculating a regional uniformity stability criterion matrix of the high-proportion power electronic power system based on the closed-loop transfer function matrix of the high-proportion power electronic power system and the transfer function matrix of the power electronic power station, and determining the safety stability of each power electronic power region based on the regional uniformity stability criterion matrix.

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 stability assessment of a high-proportion power electronic power system. Background technique [0002] With the rapid growth of new energy grid-connected scale, stability problems such as new energy broadband oscillation and transient overvoltage have become increasingly prominent. The new version of the "Guidelines for the Safety and Stability of Power Systems" clearly states that "the short-circuit ratio of power electronics power stations should reach a reasonable level", but there is a lack of specific evaluation methods and standards, and it is impossible to quantify the stability of new energy clusters connected to the AC power grid. The traditional short circuit ratio (SCR) is often used in the stability analysis of the power system after the DC transmission system is fed into the AC grid at the receiving end, and it c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0639G06Q50/06
Inventor 孙华东高磊郭强王一鸣许涛宋瑞华李亚楼安宁贺静波褚晓杰李文锋徐式蕴
Owner CHINA ELECTRIC POWER RES INST
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