Mass data-based power system safety and stability judgment method taking topological factors into consideration

Abstract

The invention discloses a mass data-based power system safety and stability judgment method taking topological factors into consideration. The method comprises the following steps: (S1) determining active power Pi and reactive power Qi, which flow through various lines in a power system; (S2) building power grid operation mode description taking topological factors into consideration; (S3) judging whether the power system runs safely and stably; (4) repeating the steps (S1) to (S3), accumulating for a period of time to obtain m groups of samples, which include operation modes x<j> (j=1, 2, ..., m) of the power system and a tag y<j> (j=1, 2, ..., m) that the power system can run safely and stably in the operation mode; (S5) building a nonlinear support vector machine model (SVM) by m groups of samples obtained in the step (S4) and finding out an interface f(x) that the power system can run safely and stably and cannot run safely and stably; and (S6) judging whether the power system can run safely and stably or not according to the online operation state of the power system by the nonlinear support vector machine model (SVM). The mass data-based power system safety and stability judgment method taking topological factors into consideration is high in response speed in judgment and applicable to power system safety and stability judgment in a complicated variable online power grid operation mode.

Description

technical field [0001] The invention relates to a method for judging the safety and stability of a power system, in particular to a method for judging the safety and stability of a power system based on massive data and considering topological factors. Background technique [0002] Due to the time-variation and complexity of large power grids, it is often difficult to determine whether the power system can operate safely and stably in real time and accurately. When abnormal conditions such as severe overload, large-scale load shedding, and partial grid splitting occur, if the safety and stability of the power system cannot be quickly judged and timely measures are taken, it is very easy to cause huge losses to the power system. [0003] The judgment of the security and stability of the traditional power system is often based on modeling the operation mode of the power grid, and then analyzing the model to judge the security and stability of the power system. Such a judgment...

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Problems solved by technology

Such a judgment method requires modeling and analysis of each operating state. The program is very complicated and the calculation time is long. It is difficult to quickly judge whether the power system can operate safely and stably under the complex and changeable online power grid operation mode.

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