Identification method of transient voltage instability and power angle instability based on transient energy function

Abstract

The invention discloses a method for identifying transient voltage instability and power angle instability based on a transient energy function. First, the admittance matrix of the system node is obtained, and its operating parameters are periodically collected during the operation of the power system. If according to If the operating parameters determine that the current power system is unstable, then the current operating parameters are substituted into the transient power angle relationship function and transient voltage relationship function constructed based on the transient energy function, and then the sensitivity function is calculated, and then combined with the system instability state , to identify the transient instability mode of the system. The invention proposes a transient power angle relation function and a transient voltage relation function based on a transient energy function method, and realizes discrimination of different instability modes by establishing a sensitivity function index.

Description

technical field [0001] The invention belongs to the technical field of power system transient stability, and more specifically relates to a method for identifying transient voltage instability and power angle instability based on a transient energy function. Background technique [0002] In recent years, with the continuous development of smart grids, the continuous enrichment and popularization of electrical appliances such as smart homes, and the continuous exploration of power electronics and other equipment connected to the grid, people's electricity demand has become more diversified and personalized, and more and more More and more new elements and new technologies are added to the power grid, forming a more complex and huge system system. Therefore, the analysis and research of the power system pursues the real-time grasp of changes in details and the comprehensive consideration of the characteristics of all aspects of the system. The evaluation and identification of ...

AI Technical Summary

Problems solved by technology

[0004] Traditional transient instability identification methods can usually only identify a single instability mode. In order to identify multiple instability modes, it is necessary to combine multiple methods for identification at the same time, and the operation is complicated; although some methods can comprehensively identify instability modes, However, the structure of the model is simple and rough, and the influence of active and reactive power of each part of the power grid on transient instability is not fully considered.

Images