Power system transient risk evaluation method taking natural disasters into consideration

Abstract

The invention provides a power system transient risk evaluation method taking natural disasters into consideration. The method comprises the following steps: determining element damage probabilities when the natural disasters are considered; determining preliminary fault sets, and classifying the preliminary fault sets; and carrying out transient risk evaluation on a power system. According to the invention, the disasters in a region are classified, multiple disaster faults in the region can be comprehensively considered, the element probabilities can be more accurate, the severity of random combination faults can be rapidly calculated, important faults are prevented from being neglected due to a restriction of a calculation amount, and the method can be applied to an actual power grid and facilitates solution of actual problems.

Description

technical field [0001] The invention relates to an assessment method, in particular to a transient risk assessment method of a power system considering natural disasters. Background technique [0002] Although natural disasters are low-probability events, they do great harm to the power system and can easily cause large-scale power outages. Power grid planning is the prerequisite for safe operation of the power system. To prevent major damage to the system caused by natural disasters, it is necessary to consider the impact of natural disasters in the process of power grid planning. At present, the power system transient risk assessment has not yet been combined with the actual power grid analysis software, and the analysis results are used to guide the power grid planning stage. [0003] In the process of power grid planning, considering as many disaster factors as possible can make the grid planning results more accurate, so as to avoid possible disaster damage to the powe...

AI Technical Summary

Problems solved by technology

In addition, most risk assessments use non-sequential Monte Carlo simulation method, that is, the use of uniformly distributed random numbers on [0, 1] and the comparison of damage probability to determine the damage state of components; while the risk assessment of the actual power grid mostly uses analytical However, due to the large number of transmission lines and the time-consuming stability calculation, generally only the N-1 or N-2 faults of the transmission line are calculated; in the event of a disaster, a large number of components may be damaged, so it is necessary to analyze method to adapt to natural disasters

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