Load transfer method based on optimal flow method and Mayeda spanning tree method

Abstract

The invention discloses a load transfer method based on an optimal flow method and a Mayeda spanning tree method. The load transfer method comprises the steps: simplifying a power distribution network, reading faulty distribution network topology, employing a method of combining an optimal flow method and a Mayeda spanning tree method to reconstruct a fault power distribution network. The reconstruction method comprises the following steps: establishing a load transfer target function and constraint conditions; opening a section switch, selecting an available interconnection switch, closing toform a looped network; determining an optimal flow mode at the moment; finding out the section switch branch with the minimum load shedding capacity of the corresponding looped network as the optimalsolution of the corresponding branch; checking whether constraint conditions are met or not: if not, adding the constraint conditions to the target function in a penalty function form, then selectinga new available interconnection switch to replace the previously selected interconnection switch, and repeating the method until the absolute value of the increment of the target function meets preset iteration precision, so as to obtain the optimal topological structure of the load transfer power distribution network. According to the invention, the optimal load transfer scheme can be obtained in a relatively short time.

Description

technical field [0001] The invention relates to a load transfer method, in particular to a load transfer method based on the optimal flow method and the Mayeda spanning tree method. Background technique [0002] At present, in recent years, with the growth of the national economy, the demand for electric energy in all walks of life has grown rapidly. However, due to the relatively lagging behind in the construction of urban power grids, and at the same time, the rise of the tertiary industry has brought about changes in the power load structure, small and medium users including residents The proportion of electricity consumption is increasing year by year, which makes the lines in the power distribution system longer and longer, with more and more nodes, and the structure becomes more and more complex. Therefore, the load transfer technology that restores the power supply to users as soon as possible after the distribution network fails and minimizes the scope of power failu...

AI Technical Summary

Problems solved by technology

At present, it is widely used to give corresponding operation schemes based on empirical methods, but it is impossible to select a better scheme through scheme comparison so that the maximum load can be transferred and the blackout range can be minimized.

In addition, the empirical method requires operation dispatchers to have good experience, and to have a deep understanding and mastery of system equipment, which has high labor costs, time costs, and economic costs

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