Method for online estimating and pre-warning grid safety accident risk levels

Abstract

The invention discloses a method for online estimating and pre-warning the grid safety accident risk levels, and belongs to the technical field of power system automation. The method comprises the following steps: on the basis of a grid current operation manner provided by an EMS and a control strategy of a second defensive line and a third defensive line, calculating and simulating the action of a control device of the second and third defensive lines through time-domain simulation in allusion to a preconceived fault set of assessments of the second and third defensive lines, so as to obtain a total fault load reduction quantity, a loss user quantity and a voltage loss station quantity; dividing the grid safety accident risk levels of the preconceived faults according to the requirements of ''Regulations on the Emergency Response to and Investigation and Handling of Electric Power Safety Accidents '' and ''Rules for the Investigation of Electric Power Accidents of China Southern Power Grid Company Limited''; and determining the important levels of the faulted equipment according to the accident risk levels. According to the method, the online estimation and pre-warning of the grid safety accident risk levels are realized, a technological foundation is laid for the real-time pre-warning and pre-control of the grid safety accidents.

Description

technical field [0001] The invention belongs to the technical field of electric power system automation, and in particular the invention relates to an online assessment and early warning method of a power grid safety accident risk level. Background technique [0002] With the development of the economy, the total load of my country's power grid is increasing year by year. The concentration of important power loads, the close electrical connection of the power grid, and the large-scale power receiving of AC and DC have led to an increase in the potential security and stability of the power grid, increasing the risk of severe power outages. Once an accident occurs, it will cause serious economic losses and social impact. State Council Order No. 599 "Regulations on Emergency Response and Investigation and Handling of Power Safety Accidents" (hereinafter referred to as the "Regulations") divides accidents into particularly serious accidents, major accidents, major accidents and...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an online assessment method for the risk level of power grid safety accidents based on the existing power grid safety accident risk level assessment, which can only be analyzed offline and counted afterwards. The current grid security accident risk level assessment technology cannot address the problem of online early warning of serious security accidents

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