Method of analyzing resonance stability of flexible DC transmission access system

A flexible DC transmission and access system technology, which is applied in the direction of power transmission AC network, reducing/preventing power oscillation, etc., can solve the problems of state space method, such as heavy workload and unknown parameters, and achieve complete resonance mode and accurate stability judgment , to overcome the effect of heavy workload

Active Publication Date: 2019-05-24
YUNNAN POWER GRID
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Problems solved by technology

[0005] This application provides a method for analyzing the resonance stability of the flexible DC transmission access system, which overcomes the difficulties of the state space method with a large workload and unknown parameters. Compared with the existing analysis methods, the scanned resonance mode is more complete. It is more accurate to judge the stability of the whole system

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  • Method of analyzing resonance stability of flexible DC transmission access system
  • Method of analyzing resonance stability of flexible DC transmission access system
  • Method of analyzing resonance stability of flexible DC transmission access system

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[0033] In order to enable those skilled in the art to better understand the technical solutions in the application, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the drawings in the embodiments of the application; obviously, the described implementation Examples are only some of the embodiments of the present application, but not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0034] Please refer to the attached figure 1 , which shows a schematic diagram of the electrical structure of the flexible direct current transmission access system provided by the embodiment of the present application. The flexible direct current transmission access system refers to a flexible direct current transmission system composed of a converter s...

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Abstract

The invention provides a method of analyzing the resonance stability of a flexible DC transmission access system. A node admittance matrix of the flexible DC transmission access system is analyzed, the resonance mode of the system is determined, and the stability of the system is further judged. In view of the application scene of analyzing the resonance stability problem of the flexible DC transmission access system, the flexible DC transmission access system resonance stability analyzing method can comprehensively analyze the resonance mode existing in the flexible DC transmission access system, and the stability of the system is judged. The resonance stability judgment method overcomes the problems of a large workload and unknown parameters of a state space method, and in comparison with an impedance analysis method, the scanned resonance mode is more complete, the stability of the whole system is more accurately judged, and some reference and guidance are provided for actual engineering planning and construction of the flexible DC transmission engineer.

Description

technical field [0001] The present application relates to the technical field of electric power transmission and distribution, in particular to a method for analyzing the resonance stability of a flexible direct current transmission access system. Background technique [0002] In order to meet the needs of energy transmission in sending-end areas and load growth in receiving-end areas in my country, long-distance and large-capacity high-voltage direct current transmission technology has been gradually promoted and applied due to its technical and economic advantages, especially the third-generation direct current transmission technology - flexible direct current power transmission technology. The flexible DC transmission technology takes the modular multilevel converter as the core, adopts power electronic devices with active turn-on and turn-off capabilities, and can achieve decoupling control of active power and reactive power without the need for commutation with the help ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/36
CPCY02E60/60
Inventor 赵岳恒钱纹胡凯陈宇王志敏张秀钊刘民伟王凌谊赵爽刘娟
Owner YUNNAN POWER GRID
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