Intelligent analysis method and intelligent analysis system of sub-synchronous oscillation
A sub-synchronous oscillation and intelligent analysis technology, applied in spectrum analysis, measuring devices, instruments, etc., can solve problems such as poor adaptability and inability to test and analyze, and achieve the effect of real-time intelligent analysis and monitoring
Active Publication Date: 2015-05-20
NORTH CHINA ELECTRICAL POWER RES INST +1
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Therefore, when the frequency of the subsynchronous component is unknown, it cannot be used for experimental analysis, and once the subsynchronous resonance frequency changes, the parameters of the modal filter need to be readjusted, which has poor adaptability
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[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0021] The invention solves the problems of poor real-time performance of traditional long-time window spectrum analysis and poor adaptability of modal filter analysis in power system subsynchronous oscillation analysis. Realize intelligent spectrum analysis based on short time window and modal filter analysis of automatic tuning, and achieve the purpose of real-time intelligent analysis and monitoring of power system subsynchronous oscillation.
[0022] In order to achieve the above purpose, as figure 1 As shown, the present embodiment provides an intelligent analys...
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The invention discloses an intelligent analysis method and an intelligent analysis system of sub-synchronous oscillation. The intelligent analysis method of the sub-synchronous oscillation includes the following steps of generating a correction factor and a transformation factor according to the range of frequency to be analyzed and the refining level of the frequency, obtaining input wave form data and window function data, generating input wave form correction data according to the correction factor, the input wave form data and the window function data, generating frequency spectrum composition of the input wave form data according to the transformation factor and the input wave form correction data, conducting peak value scanning on the frequency spectrum composition, screening out the frequency of a sub-synchronous oscillation component, generating a filter coefficient diagram according to the sampling frequency, the pass-band coefficient, the attenuation band coefficient and the width of a transmission band, mapping the position of each frequency of the sub-synchronous oscillation component on the filter coefficient diagram, assigning value to the coefficient of a modal filter, and generating a synchronous oscillation component according to the input wave form data after initializing the modal filter. The intelligent analysis method and the intelligent analysis system of sub-synchronous oscillation can achieve real-time intelligent analysis and detection of the sub-synchronous oscillation of an electrical power system.
Description
technical field [0001] The present invention relates to subsynchronous oscillation analysis technology, in particular to an intelligent analysis method and system for subsynchronous oscillation. Background technique [0002] In the prior art, the analysis method of subsynchronous oscillation usually adopts the spectrum analysis technology with long time window, because this technology needs to use a large amount of data with long time window (generally longer than 10 seconds), real-time analysis and calculation are relatively difficult, and offline The post-analysis method is to obtain the test recording data in the field test, and then use the long-time window spectrum analysis to find out the sub-synchronous frequency components contained in it. Using the spectrum analysis technology with a long time window can make the results of the spectrum analysis more refined, and can better distinguish two spectrum components that are close together. However, since the calculation ...
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IPC IPC(8): G01R23/167
Inventor 姚谦苏为民吴涛王鹏贾文双
Owner NORTH CHINA ELECTRICAL POWER RES INST