A Method for Quickly Judging the Stability of Local Power Grid

Abstract

The invention discloses a method for rapid determination of the stability of a local power grid. According to the method, simple structure and operation of the local power grid can be met through setconditions and a mathematical model, and the stability condition of the local power grid is determined by employing less data and a simple equation so that the real-time performance of determination is improved and the balance between the calculation reliability and the timeliness is realized. The method includes: determining whether the operation state of the local power grid satisfies one or more of three conditions; determining whether node voltage effective values of all nodes are in a stable range; establishing a mathematical model with less data requirement and simple calculation; and calculating the stability of the local power grid according to real-time data and the mathematical model.

Description

technical field [0001] The invention belongs to the technical field of smart grids, in particular to a method for obviously improving the efficiency of judging the stability of a grid when the operating structure of a local grid is relatively simple. Background technique [0002] The safe and stable operation of the power system is the basic requirement for the power system. In order to meet this requirement, it is necessary to conduct real-time stability analysis based on real-time topology results and load conditions of the power system, such as implementing complex power flow calculations and section analysis. Although the accuracy of these calculations is high, the overly cumbersome calculation method and the data extraction process make the real-time performance weak. The weaker real-time performance makes the problems and faults in the power system discovered later, which leads to slower decision-making, which can easily lead to system collapse. [0003] Existing sta...

AI Technical Summary

Problems solved by technology

Although the accuracy of these calculations is high, the overly cumbersome calculation method and the data extraction process make the real-time performance weak

The weak real-time performance makes the problems and faults in the power system discovered later, which leads to slower decision-making, which easily leads to the collapse of the system.

[0003] Existing stability analysis adopts a unified method for large power grids, and does not use a simpler but less accurate method based on the simplicity of the grid structure

Images