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

A technology of load transfer and path search, which is applied in the direction of circuit devices, AC network circuits, electrical components, etc., can solve the problems of inapplicability, the quality of the solution depends on the initial state, and the time-consuming and labor-intensive establishment and integration, so as to reduce operational errors The probability, good applicability and timeliness, the effect of improving reliability

Inactive Publication Date: 2017-05-17
STATE GRID HEILONGJIANG ELECTRIC POWER COMPANY +1
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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 ar

Method used

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

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Embodiment

[0052] by image 3 As an example, the implementation process of the method provided by the present invention is explained in detail. image 3 The photovoltaic-energy storage system in is in the state of absorbing external energy, so the equivalent power node is marked as 0. The figure can be divided into 3 power supply blocks

[0053] a 1 {s 1 ,c 2 ,c 3 , l 8 ,c 9 , l 10 , l 11 ,e 1，2 ,e 2，3 ,e 2，8 ,e 3，9 ,e 9，1 0,e 9，11}, a 2 {c 4 ,C 5 ,c 6 ,s 7 , l 12 , l 13 , l 14 ,e 4，5 ,e 5，6 ,e 6，7 ,e 4，12 ,e 5，13 ,e 5，14}, a 3 {c 15 , l 16 ,c 17 , l 18 ,s 19 ,e 15 , 16 ,e 15，17 ,e 17，18 ,e 17，19}. See the table below for the size of each load and the upper limit of the power supply node capacity.

[0054] l 8

l 10

l 11

l 12

Load / kW 1800 2000 2000 1000 l 13

l 14

l 16

l 18

Load / kW 1500 1500 1500 2000 s 1

s 7

s 19

Capacity / kW 8000 7000 6000

[0055] (1...

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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...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/0073H02J2203/20
Inventor 王志伟孙晓波李冶天田石刚李世纶李兵崔旭付黎苏闵成男刘坤李天一
Owner STATE GRID HEILONGJIANG ELECTRIC POWER COMPANY
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