Method and system for evaluating risk grade of operation mode of urban power distribution network

Abstract

The invention discloses a method for evaluating the risk grade of an operation mode of an urban power distribution network. The method comprises the following steps: inputting all historical data according to dimensionalities so as to establish a risk evaluation database; performing correlation analysis among all the historical data in different dimensionalities in the risk evaluation database so as to generate a correlation coefficient table; and evaluating the risk grade according to the risk evaluation database and the correlation coefficient table. Compared with the prior art, the database including multi-dimensional historical data is established in the method disclosed by the invention; furthermore, correlation analysis is carried out in combination with the multi-dimensional historical data; finally, the risk grade evaluation is carried out according to the database and the correlation analysis; the operation risk evaluation of the power distribution network is realized due to multiple comprehensive factors (the multi-dimensional historical data include fault information and other influence factors; and thus, the evaluation result is more accurate. The invention further discloses a system for evaluating the risk grade of the operation mode of the urban power distribution network.

Description

technical field [0001] The invention relates to the technical field of analysis of safe and stable operation characteristics of a distribution network, in particular to a multi-dimensional data-based risk level evaluation method and system for the operation mode of an urban distribution network. Background technique [0002] The safe and stable operation of the power grid has always been the ultimate goal of power construction. As an important link connecting the transmission network and users, the operation security of the distribution network is crucial to the safe and stable operation of the entire power grid. Therefore, evaluating the security of the distribution network is conducive to improving the weak links of the power grid to improve the reliability of power supply. Among them, the risk assessment of the distribution network is an important branch of the power system risk assessment, which is aimed at various uncertain factors in the operation of the power grid, an...

AI Technical Summary

Problems solved by technology

[0005] (2) Insufficient consideration of risk factors affecting the assessment results, resulting in inaccurate risk assessment

Consequences and probabilities in risk assessment are required to be as accurate as possible. Factors that affect these two aspects include line status, equipment conditions, and weather. Although the degree of influence is different, ignoring any possible factors will affect the assessment. The result makes an impact

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