Rapid evaluation method for transient angle stability based on comprehensive causal analysis and machine learning

A technology of transient power angle stability and causal analysis, applied in instruments, data processing applications, resources, etc., can solve problems such as large dependence on personnel experience and insufficient application of historical analysis results

Active Publication Date: 2018-11-23
NARI TECH CO LTD +2
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Problems solved by technology

The above method has achieved certain results, but the application of historical analysis results is not sufficient. There is a certain degree of blindness in the use of pure machine learning methods. At the same time, the method of manually screening state quantities relies heavily on personnel experience

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  • Rapid evaluation method for transient angle stability based on comprehensive causal analysis and machine learning

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Embodiment Construction

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

[0035] In order to achieve the purpose and effect of the technical means, creation features, work flow, and use method of the present invention, and to make the evaluation method easy to understand, the present invention will be further described below in conjunction with specific examples.

[0036] The present invention will be further described below with reference to the accompanying drawings and in conjunction with examples.

[0037] Such as figure 1 As shown, the transient power angle stability rapid evaluation method of this comprehensive causal analysis and machine learning provided by the present invention comprises the following steps:

[0038] Step 1) Obtain historical data samples; the on...

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Abstract

The invention discloses a rapid evaluation method for transient angle stability based on a comprehensive causal analysis and machine learning, which comprises dividing a historical operation mode sample into several operation mode clusters based on historical data stored by a transient stability evaluation function of online security analysis applications, describing the transient angle stabilitymargin by linearization formula according to the difference between the modes, and extracting a key feature quantity of a power grid; constructing a deep learning model and using a historical data sample to train by taking the key feature quantity as an input quantity and taking a historical operation mode cluster classification as an output quantity, establishing a relationship between a currentreal-time operation mode and the historical operation mode, and estimating the transient angle stability of the current real-time operation mode. According to the rapid evaluation method for transientangle stability based on the comprehensive causal analysis and machine learning, the calculation time consumption can be effectively reduced, and the quantitative analysis results of the power grid transient angle stability can be quickly obtained while ensuring the accuracy of the transient angle stability analysis. This helps to detect the transient operation risks existing in the power grid and improve the safe operation level of the power grid.

Description

technical field [0001] The invention relates to the technical field of power system security and stability analysis, in particular to a method for rapidly evaluating transient power angle stability through comprehensive causal analysis and machine learning. Background technique [0002] In order to ensure the safe and stable operation of the power grid, especially the UHV AC-DC hybrid power grid, dispatching agencies at all levels need to be able to quickly grasp the safe and stable operation of the power grid, and quickly locate the risk points and risk levels of the power grid operation, so as to provide risk prevention and control for the power grid. Provide a basis for control decisions. At present, most of the power grid dispatching control institutions at the provincial level and above in China have established the online security analysis application function of the power grid. Comprehensively evaluate the safety and stability of the power grid from multiple aspects ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/06393G06Q50/06
Inventor 李铁刘强查显煜徐泰山苏安龙唐俊刺汲广军邵伟罗桓桓高凯曲祖义葛延峰姜枫崔岱孙文涛曾辉王顺江张艳军郭春雨孙明一丛海洋
Owner NARI TECH CO LTD
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