Electric power system cascading failure blocking method based on active minimum generator tripping

Abstract

The invention provides an electric power system cascading failure blocking method based on active minimum generator tripping, which is used for solving the problem of electric power system cascading failure caused by line overload in the prior art. A calculation method of the minimum generator tripping amount for blocking cascading failures is provided; meanwhile, by considering a power constraint, a load capacity constraint and a balance node adjustment speed constraint, a verification method for verifying the minimum generator tripping amount is provided; meanwhile, aiming at the condition that the minimum generator tripping amount does not meet the constraints, the invention provides a correction method of the minimum generator tripping amount. According to the method, the power control capability of the power supply in the power system can be utilized to the maximum extent, the power of the overload power transmission line is rapidly recovered, and the generator tripping and load shedding power is reduced as much as possible, so that cascading failures of the power system are effectively blocked, the blocking cost is reduced, and the power system stability is improved.

Description

technical field [0001] The invention relates to the field of cascading fault control of power systems, in particular to a method for blocking cascading faults of power systems based on active minimum shutdown. Background technique [0002] In recent years, there have been many major power outages around the world, which are often caused by cascading failures. With the continuous expansion of the scale of my country's UHV interconnected power grid, once a cascading failure event occurs, it will inevitably cause heavy losses. Therefore, how to correctly and effectively control the risk of cascading failure is of great significance to ensure the safe and reliable operation of the power grid. Studies have shown that the power flow transfer and overload trip caused by random faults are an important factor to induce cascading failures. Control measures should be taken to eliminate overload and avoid the occurrence of cascading overload trips. [0003] Some researchers try to avo...

AI Technical Summary

Problems solved by technology

A calculation method for the minimum shedding amount used to block cascading faults is proposed; at the same time, a verification method for the minimum shedding amount obtained by checking is proposed considering the power supply constraints, load capacity constraints, and balance node adjustment speed constraints; at the same time , in view of the situation that the minimum cut-off amount does not satisfy the constraints, a correction method for the minimum cut-off amount is proposed

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