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N-x fast topology analysis method and system and readable storage medium

A topology analysis and fast technology, applied in the direction of AC network circuits, electrical components, emergency protection circuit devices, etc., can solve the problems of speeding up the topology analysis without further consideration, insufficient to meet the N-x fault scanning, etc., to reduce the frequency of topology analysis, reduce Calculate time-consuming and achieve the effect of performance

Pending Publication Date: 2022-06-28
CHINA ELECTRIC POWER RES INST +4
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Problems solved by technology

However, no further consideration is given to speeding up topology analysis after N-x faults. When a device is disconnected, the grid topology will change, and the physical model and calculation model of the grid will change accordingly. In the existing technology, each device needs to be restarted. For topology analysis, especially when performing N-x fault scanning, the more faults involved in scanning, the greater the computational load of topology analysis, so this method is not enough to meet the requirements of N-x fault scanning

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  • N-x fast topology analysis method and system and readable storage medium
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  • N-x fast topology analysis method and system and readable storage medium

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Embodiment

[0156]Taking the power grid model data section of the Guofen Control Cloud Real-time Data Platform at a certain time in November as an example, it includes 20,948 AC lines, 15,279 transformers, 30,082 physical buses, 8,933 units, and 415,456 circuit breakers and isolating switches. The topology analysis of the power grid model is carried out to generate a calculation model, and the number of grid connection points is 385,767, the number of calculation buses is 46,552, the number of AC branches is 53,808, and the number of DC branches is 522. Based on the calculation model, the System network analysis shows that there are 22,197 electrical islands, including 22,029 AC islands, 168 DC islands, 87 electrified electrical islands, and 7 electrified AC islands. It takes a total of 0.042s to perform a ground state topology analysis on the whole network model, among which the analysis of the plant bus takes 0.034s, and the analysis of the system network takes 0.008s. Traditional N-x t...

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Abstract

The invention discloses an N-x rapid topology analysis method and system and a readable storage medium, and the method carries out the classification processing of different switching-on and switching-off power grid equipment, does not need to carry out the whole network topology analysis once again when one piece of equipment is switched on and off, can judge which type of topology change the switching-on and switching-off belongs to in advance when a line, a transformer and a unit are switched on and off, and improves the efficiency. According to the method, unnecessary repeated topology analysis can be greatly reduced, only local modification is needed, and the calculation efficiency is improved; according to the method, the number of nodes and the number of branches needing to be searched for in topology analysis are greatly reduced, a new calculation model can be constructed according to splitting of an original node branch calculation model, and the efficiency of complex fault topology analysis and online analysis calculation is effectively improved.

Description

technical field [0001] The invention relates to the field of network topology analysis, in particular to an N-x fast topology analysis method, system and readable storage medium. Background technique [0002] Power system network topology analysis is the basic function of online analysis and calculation of the smart grid dispatching control system. When performing N-x fault scanning, it is necessary to continuously re-analyze the power grid network topology according to different equipment commissioning and withdrawing conditions. When the number of faults participating in scanning is more, the computational load of topology analysis is larger. Therefore, reducing the time consumption of network topology analysis during N-x fault scanning is of great significance to improving the performance of fault scanning calculations. [0003] The power system network topology analysis generates the calculation model (bus model) of the power grid from the physical model (node ​​model) ...

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Application Information

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IPC IPC(8): H02H7/28H02H7/22
CPCH02H7/28H02H7/22H02J2203/20
Inventor 石上丘罗雅迪於益军孙博李理吕闫马晓忱李劲松刘金波唐俊刺张鹏刘蒙曹坤孙茜李桐姚程商敬安康宁刘涛徐遐龄韩巍张印王少芳刘升门德月
Owner CHINA ELECTRIC POWER RES INST
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