Solution to preventing power system from collapse in case of catastrophe

Abstract

A policy-making method is composed of three stages of preprocessing and parameter being made as preliminary test for the primitive power network, narrowing search space to satisfy "generator synchronization" and "power balance" for off-the-line tactics collection based on OBDD olgorithm, inspecting "transmission line safety" restriction with quick trend calculation and giving out candidate resonable off-the-line tactics. By time division, the process can be carried out by computer with operation as stages according to long and short periodic off-line layer and then on-line layer.

Description

technical field [0001] The disconnection decision-making method for avoiding power system collapse under catastrophic accidents belongs to the technical field of power network security. [0002] In a large-scale power system, severe local faults can lead to instability of the power system, such as out-of-synchronization (out-of-step) of generator sets, imbalance between power supply and demand, and deviation of power frequency and voltage from the rated range. The development of these phenomena may cause the expansion of accidents and even the collapse of the entire power grid, that is, a large-scale power supply interruption, resulting in serious economic losses. In this case, it is necessary to take effective emergency control measures in time to avoid the collapse of the power system. Disconnection is a control measure that can effectively avoid asynchronous operation or even collapse of the power system. The system works in a "quasi-normal" state, that is, the internal g...

AI Technical Summary

Problems solved by technology

This status quo is firstly due to the fact that the search problem of the separation strategy of a large-scale power network is a very complicated problem. We have proved in theory that this is an NP-hard problem. As the size of the power grid increases, the space of alternative strategies will occur exponential explosion

This approach oversimplifies a very complex problem and is therefore hardly always effective

In view of this, although many studies have been done on the problem of power system disconnection under catastrophic accidents for many years, the continuous occurrence of power system collapse accidents cannot be avoided.

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