Method of searching distribution network load transfer path based on greedy algorithm

Abstract

The invention belongs to the field of distribution network load transfer, and in particular relates to a method of searching a distribution network load transfer path based on a greedy algorithm. The method comprises the steps of (S1) searching for all the blocks adjacent to ai and in a normal power supply state when a power point of the power supply block ai exits, finding a connection switch which is required to be closed for the transfer for ai, and denoting the total number of adjacent power supply blocks that can transfer power for ai as t; (S2) finding an uninterruptible power transfer scheme, the process containing no load shedding operation; and (S3) obtaining a viable transfer scheme by shedding a part of the load. According to the invention, a transfer path is quickly found in an area where the power is cut off due to sudden failure during the actual operation of a distribution network, and the probability of operation failure of an operator is reduced with the minimum number of switching operations as the target, thereby effectively improving the power supply reliability.

Description

technical field [0001] The invention belongs to the field of distribution network load transfer, and in particular relates to a search method for a distribution network load transfer path based on a greedy algorithm. Background technique [0002] As the last link of the power system, the distribution network's power supply reliability directly determines the quality of power consumption of users. When a fault occurs in the distribution network, in addition to isolating the fault area and repairing it as soon as possible, it is also necessary to minimize the impact of the fault on the overall distribution network through load transfer. Load transfer means that after the distribution network fails and is isolated, through the operation of the switch and the removal of some unimportant loads, under the condition of satisfying the safety constraints, the power supply of important loads downstream of the fault is quickly and preferentially restored, and at the same time, the powe...

AI Technical Summary

Problems solved by technology

The heuristic algorithm cannot achieve the optimality of the solution, and the quality of the solution depends on the initial state of the network; the random optimization algorithm often takes a long time to calculate and is not suitable for large-scale networks; the establishment and integration of the library in the expert system is time-consuming Laborious, and there are many types of faults, and it is impossible to record all the situations

[0004] In the actual operation of the distribution network, it is necessary to propose a power supply transfer plan for various sudden power outages in time, so there are high requirements for the calculation speed and applicability of the algorithm, and the existing algorithms have certain limitations.

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