Fault examining system and method for power grid operation

Abstract

A fault examining system and method for power grid operation aim at the problem that the traditional deterministic analysis methods such as N-1 disconnecting can only be used for calculating the safety of the operation mode of a given time section but cannot simulate the power grid safety under uncertain factors. The fault examining system for the power grid operation comprises a data collecting module for collecting the data of a power gird and sending the data to a risk index evaluation module, the risk index evaluation module for calculating the risk index of the collected data and sending the risk index to a risk level evaluation module, the risk level evaluation module for calculating the risk level according to the risk index, feeding the result back to the risk index evaluation module and sending to a data output display module, and the data output display module for displaying a power grid risk level result, a load flow calculation result, a risk index result and a load reduction result. The method can be used for fast evaluating the current operation risk of the power grid, can provide a quantitative risk evaluation means and a precaution control means for power scheduling personnel, and is favorable for improving the safety level of the power grid.

Description

technical field [0001] The invention belongs to the technical field of electrical automation, and relates to a power grid operation risk assessment and accident handling system. Background technique [0002] With the development of society and economy, the installed capacity and load level of the power grid are increasing year by year, the scale of the power grid is increasing day by day, the operation mode is more complicated, and the nature and scope of influence of power grid accidents are becoming more and more serious. For major economic losses, casualties and political influences, power grid operation mode, load fluctuations, power grid faults such as generators and transmission lines have random characteristics. It is difficult to conduct accurate and effective analysis on the safety and stability of the current power grid operation; at the same time, traditional "N-1" disconnection and other deterministic analysis methods can only calculate the safety of the section ...

AI Technical Summary

Problems solved by technology

[0002] With the development of society and economy, the installed capacity and load level of the power grid are increasing year by year, the scale of the power grid is increasing day by day, the operation mode is more complicated, and the nature and scope of influence of power grid accidents are becoming more and more serious. For major economic losses, casualties and political influences, power grid operation mode, load fluctuations, power grid faults such as generators and transmission lines have random characteristics. It is difficult to conduct accurate and effective analysis on the safety and stability of the current power grid operation; at the same time, traditional "N-1" disconnection and other deterministic analysis methods can only calculate the safety of the section operation mode at a given time, and cannot simulate the safety of the power grid under uncertain factors limitations

The reliability algorithm used for power grid planning can automatically search for all possible fault sets, and most of the calculation indicators are the expected value of power outage risk indicators, which can be used to compare the rationality of different planning schemes, but cannot specifically give the relationship between calculation indicators and failure modes. relationship, the calculation cycle is long, and real-time calculation results cannot be given according to changes in the power system operating status, and it is difficult to meet the requirements of power grid operation and dispatching

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