Power transmission line icing galloping fault risk assessment method

Abstract

The invention provides a power transmission line icing galloping fault risk assessment method, which comprises the following steps: firstly, acquiring local meteorological factors and line parameters, and calculating a fault probability by using data through a fuzzy algorithm; acquiring a bus voltage, and calculating a bus voltage out-of-limit severity index; obtaining the branch power, and calculating a branch overload severity index; calculating a consequence severity function after the line fault according to the bus voltage out-of-limit severity index and the branch overload severity index; calculating a risk indicator function according to the fault probability and a consequence severity function after the line fault; according to the risk index function, judging the risk level, and taking corresponding early warning measures according to the risk level. The power transmission line icing galloping fault risk assessment method provided by the invention is simple in calculation thought, can be implemented through a computer, is convenient to operate, can assess the icing galloping fault risk of the power transmission line, and provides support for risk management work of a power grid management department.

Description

technical field [0001] The invention relates to the technical field of power system transmission lines, in particular to a risk assessment method for icing galloping faults of transmission lines. Background technique [0002] Since the power system is exposed to the natural environment for a long time, transmission lines are often affected by natural disasters, and the early warning of power grid failures caused by natural disasters is an important way to ensure the safe and stable operation of the power grid. Icing disaster is one of the most serious disasters affecting power system operation. Icing disasters will not only cause transmission line trips, but also cause system damage and long-term line outages. It has always been the focus of power grid disaster defense. Due to the many factors affecting ice flashover, the research on the risk assessment and early warning of ice flashover is also complicated. Therefore, it is necessary to design a risk assessment method for...

AI Technical Summary

Problems solved by technology

Due to the many factors affecting icing flashover, the research on the risk assessment and early warning of icing flashover is also relatively complicated.

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