Data driving method for dynamic safety assessment of power system

Abstract

A data driving method for dynamic safety assessment of an electric power system comprises the following steps: 1), obtaining operation data of the electric power system, constructing corresponding dynamic safety indexes, and constructing an initial sample set containing an operation data set and the dynamic safety indexes; 2) processing the initial sample set to achieve the purposes of data compression and dimension reduction, and generating an efficient sample set; 3) obtaining a dynamic safety assessment model; 4), obtaining a near-real-time updating sample set, and completing the updating of the dynamic safety evaluation model; and 5) completing evaluation of the real-time dynamic safety state of the power system to obtain a real-time dynamic safety evaluation result. The invention aimsto provide the dynamic safety assessment method which is beneficial to improving the assessment speed and the prediction precision, is beneficial to system operation personnel to take prevention andcontrol measures in time, and improves the operation stability and the power supply reliability of a power system.

Description

technical field [0001] The invention relates to the field of dynamic security assessment of power systems, in particular to a dynamic security assessment method of a local linear embedding algorithm and a decision tree-support vector machine algorithm. Background technique [0002] In recent years, with the continuous development of modern power systems, modern power systems have become one of the most complex artificial systems in the world. At the same time, with the increasing penetration of distributed energy in the power system, uncertain factors increase, and the operational risks faced by the power system also increase. With the development of large-scale cross-regional interconnected power grids, when the interference and faults reach a certain level, the power system may lose stability, which makes the safe and stable operation of the power system face severe challenges. If the operator of the power system cannot quickly and accurately assess the safety status of t...

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Problems solved by technology

[0004] (1) The traditional mechanism analysis method mainly relies on offline calculation, which has problems such as large calculation amount and long calculation time, and it is difficult to meet the calculation speed requirements of online dynamic security assessment, and cannot provide stability margin information and many other defects;

[0005] (2) The traditional data-driven method has many limitations when it is directly applied to the dynamic security assessment of the power system, and does not consider many factors that may affect the dynamic security assessment, such as the efficiency of the training sample set, and cannot provide visualization dynamic security information for

[0006] As mentioned above, traditional methods have been difficult to meet the needs of dynamic security assessment of modern power systems, and there is an urgent need for an online dynamic security assessment method that can meet high adaptability and high precision.

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