Method for designing stabilizer of an uncertain power system based on interval time lag influence

A power system and design method technology, applied in the field of wide-area power system analysis, can solve problems such as reducing the conservatism of time-delay power system stability criteria

Active Publication Date: 2021-01-05
HENAN POLYTECHNIC UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Although the above literature has reduced the conservatism of the stability criterion of the time-delay power system to a certain extent, there is still a lot of room for improvement in the model description, functional construction and scaling techniques

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  • Method for designing stabilizer of an uncertain power system based on interval time lag influence
  • Method for designing stabilizer of an uncertain power system based on interval time lag influence
  • Method for designing stabilizer of an uncertain power system based on interval time lag influence

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Embodiment Construction

[0157] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0158] It should be noted that, unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field of the present invention. Terms used in the description of the present invention are only for the purpose of describing specific embodiments, and are not used to limit the present invention.

[0159] T...

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Abstract

The invention relates to a method for designing a stabilizer of an uncertain power system based on interval time lag influence, which comprises the following steps of: constructing a new augmentationvector and a multiple integral LyapunovKrasovskii functional, then introducing a double Wirtinger inequality to estimate a functional derivative on the basis of a single Wirtinger integral inequality,and adopting a convex combination method, so that a system robustness stability criterion with lower conservative property is obtained. On the basis, a memory-free and memory feedback controller of the system is designed, and a step linearization method is applied to obtain a stabilizer existence condition based on a strict linear matrix inequality. Finally, simulation analysis verifies that themethod provided by the invention effectively enlarges the stable operation region of the power system, and the designed controller has better control performance.

Description

technical field [0001] The technical field of wide-area power system analysis of the present invention relates in particular to a design method of a stabilizer based on an uncertain power system under the influence of interval time delay. Background technique [0002] In recent years, the rapid development of the power industry has led to the continuous expansion of the scale of the power system. Large-scale grid interconnection has become an inevitable trend in the development of today's power system. Traditional feedback controllers alone cannot guarantee the safe and stable operation of complex power systems. With the development of phasor measurement unit (PMU) and wide area measurement technology (wide area measurement system, WAMS), the ultra-long-distance transmission and global control of information become possible, which contributes to the stability of wide area power system. Analysis and control provide new means. Wide-area feedback signal control can effectively...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24
CPCH02J3/24H02J2203/10H02J2203/20
Inventor 钱伟郭建锋吴中华吴嘉欣杨慧慧
Owner HENAN POLYTECHNIC UNIV
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