Power grid planning scheme risk evaluation method considering power system operation mode

Abstract

The invention relates to a power grid planning scheme risk evaluation method considering a power system operation mode. Aiming at the defect that the operation mode probability is not considered in the power grid planning scheme risk evaluation, load and power generation data are classified accurately by using a multi-dimensional K-means clustering algorithm with low time complexity and high robustness, a clustering model of multi-level horizontal load and power generation level is established, and an annual typical operation mode and the probability thereof are solved in combination with a power grid repairing scheme; on the basis of the annual typical operation mode, the transient security risk of the system is evaluated by using an analysis method. According to the method, the risk of the planning scheme is more accurately evaluated by the planning personnel, so that a rational planning decision is provided.

Description

Technical field: [0001] The invention relates to a risk assessment method for a power grid planning scheme, and more particularly to a risk assessment method for a power grid planning scheme that takes into account the operation mode of a power system. Background technique: [0002] In recent years, there have been frequent safety accidents in large power grids abroad, and these accidents have made people realize the importance of improving the safety of power grids. Only by accurately assessing the risks faced by the power system can the security of the power system be guaranteed. [0003] Before conducting risk assessment on the power system, it is necessary to have a deep understanding of the method, content, etc. of the power system security assessment. At present, the safety analysis method used in the actual power system is: firstly, according to the historical load, power generation, grid structure and other data, determine an operation mode, and then use the AC powe...

AI Technical Summary

Problems solved by technology

This processing method ignores the randomness of the input data and does not consider the probability of the operation mode; and the selection of the operation mode has a great impact on the results of the system risk assessment. Under different operation modes, the system risk varies greatly. The resulting planning scheme Therefore, in order to improve the accuracy of risk assessment, it is urgent to consider the probability of operation mode in system risk assessment

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