Transient stability out-of-limit probability calculation method and device for new energy power generation uncertainty

Abstract

The invention discloses a transient stability out-of-limit probability calculation method and device considering new energy power generation uncertainty, and the method comprises the steps: calculating a comprehensive impact factor of a new energy field station for the transient stability of a power grid according to the transient stability margin of a transient stability key mode and a new energyfield station participation factor, and determining a leading new energy field station; according to the new energy station active probability distribution density function, the active real-time planning value and the comprehensive influence factor of the active real-time planning value on the transient stability of the power grid, determining an active sampling interval of the leading new energystation, and generating an active grading interval combination of each leading new energy station; calculating the transient stability margin of the anticipated fault in the power grid operation state corresponding to each combination to obtain a transient stability margin out-of-limit combination; and calculating the transient stability out-of-limit probability of the new energy power generationuncertainty according to the probability of the combination of the anticipated fault occurrence probability and the transient stability margin out-of-limit. Quantitative evaluation of the transient stability out-of-limit risk of the power grid is realized.

Description

technical field [0001] The invention relates to a method and device for calculating the transient stability limit-crossing probability of uncertainty in new energy power generation, and belongs to the technical field of power system operation and control. Background technique [0002] The security and stability of the power grid changes with the change of the power grid operation state. The uncertainty of new energy power generation will lead to the uncertainty of the power grid operation state. The safety and stability of the power grid under the new energy grid connection presents a probabilistic characteristic. As the proportion of new energy power generation gradually increases, the uncertainty of power grid operation status will gradually intensify, and the probability characteristics of power grid security and stability cannot be ignored. Important indicators. [0003] For the treatment of uncertainty in new energy power generation, the scenario method is usually adop...

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Problems solved by technology

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a transient stability limit probability calculation method and device considering the uncertainty of new energy power generation, so as to solve the problem that the existing methods cannot meet the practical requirements of a large number of new energy stations. On-line Security and Stability Analysis Calculation Speed ​​Requirements of Power Grid

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