Transient stabilization control method for interconnection electrical network after impact disturbance

Abstract

The invention provides a transient stabilization control method for an interconnection electrical network after impact disturbance. The method comprises: based on the transient energy function of the electrical network after the impact disturbance, establishing, according to the energy propagation characteristic of the power fluctuation of a junctor, a junctor cut set potential energy function; through a junctor cut set potential energy curve and the angular phase difference of the busbars at the two ends of the junctor, predicting the angular phase stability of the interconnection electrical network; and calculating the power for removing a unit when there is power angle instability. The method provided by the invention can be applied to the theoretically and simulation analysis of an electric power system. By using the method, the propagation characteristics of transient energy in the electrical network after the impact disturbance can be mastered, the stability of the interconnection electrical network can be predicted, and a controlled variable for maintaining stability can be calculated, thus effective measures can be taken by analysis personnel, and the safe and stable operation level of the electric power system can be improved.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a transient stability control method for an interconnected power grid after impact disturbance. Background technique [0002] With the increase of the degree of interconnection between regional power grids, especially the commissioning of the Changzhi-Nanyang-Jingmen UHV test and demonstration project, my country's power grid has become the world's largest inter-regional interconnected power grid. After the impact disturbance occurs, power fluctuations often occur on the tie line. When the impact disturbance reaches a certain level, power angle out-of-step will occur at the transmission section of the tie line, resulting in system power angle instability, especially on the UHV tie line. Large power fluctuations, and become the weakest transmission section in the grid, not only affects the stability of the North China-Central China interconnected grid, but also l...

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Problems solved by technology

In terms of the transient stability real-time control method for the impact disturbance of the interconnected grid, there are no relevant reports at home and abroad.

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