Power system transient stability determination method based on support vector machine

A power system and transient stability technology, which is applied in the field of power system transient stability judgment based on support vector machines, can solve the problems of difficult online analysis, complex calculation, and large calculation amount, and achieve easy online application and simple calculation method , the effect of high classification accuracy

Active Publication Date: 2015-09-02
STATE GRID ZHEJIANG ELECTRIC POWER +2
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Problems solved by technology

[0008] The purpose of the present invention is to overcome the problems that the existing transient stability judgment method of the power system is complex in calculation, time-consuming, and difficult to realize online analysis, and provides a transient stability evaluation and judgment method of the power system based on a support vector machine. The

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  • Power system transient stability determination method based on support vector machine
  • Power system transient stability determination method based on support vector machine
  • Power system transient stability determination method based on support vector machine

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[0031] The method of the invention utilizes round-by-round optimization to determine the set of input feature quantities of the support vector machine, and then establishes a power system transient stability evaluation rule through the SVM, thereby realizing online transient stability evaluation of the power system. In conjunction with accompanying drawing and embodiment, describe in detail as follows:

[0032] The power system transient stability evaluation rule generation method based on Support Vector Machine SVM (Support Vector Machine) proposed by the present invention is characterized in that the method comprises the following steps:

[0033] 1) Determine the candidate set of input vector elements, the number of input vector elements, the kernel function of SVM and the training parameters:

[0034] The input vector candidate set is usually related electrical information in the power system, such as bus voltage, line power, etc. The number of elements in the candidate set...

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Abstract

The invention relates to a power system transient stability determination method based on a support vector machine and belongs to the technical field of power system automatic analysis. The method is characterized by determining an input characteristic set of the SVM (Support Vector Machine) using optimization searching step by step, and further establishing transient stability assessment rules through the SVM. The method comprises a first step of determining an input vector alternative set, an input vector element number, a kernel function of the SVM and a training parameter; a step of generating a training sample and a testing sampling; a step of adding all alternative characteristics into the input characteristic set one by one, training the SVM, and determining a characteristic which enables the SVM classification accuracy to be highest; a step of determining whether the characteristic selection computation is completed or not and output of the input characteristic set; and a final step of training the SVM to obtain the stability rules. According to the invention, the algorithm is easy to implement and the computational complexity is low; the method can be applied to on-line safety and stability assessment of power system at different levels such as regional power systems and provincial power systems in the country; and the system safe and stable operation is effectively ensured under the background that the power grid characteristic is gradually complex.

Description

technical field [0001] The invention belongs to the technical field of power system scheduling automation, and in particular relates to a power system transient stability judgment method based on a support vector machine. Background technique [0002] Power system transient stability analysis is used to discover potential hidden dangers in power system operation and guide power system security and stability control, which is an important link in the normal operation of power systems. At present, the transient stability analysis method used in the power system is the time-domain simulation method, which is complex and time-consuming, and it is difficult to realize online analysis and calculation. [0003] Mainly used for classification, support vector machines are an application of supervised learning methods, that is, training with samples to establish input-output mapping rules. The form of the training sample is (X, y), where X is the input vector, the elements of which n...

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
Inventor 闵勇胡伟陈磊张玮灵
Owner STATE GRID ZHEJIANG ELECTRIC POWER
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