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A key line identification method and system based on reliability value increment

A key circuit and identification method technology, applied in the direction of system integration technology, information technology support system, circuit device, etc., can solve the problem of not considering the value increment of reliability

Active Publication Date: 2018-08-24
DATONG POWER SUPPLY COMPANY OF STATE GRID SHANXI ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former only considers the role of the line in power transmission, and does not consider its reliability value increment; the latter requires reliability evaluation calculations for each component one by one, which is almost impossible for large-scale power systems

Method used

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  • A key line identification method and system based on reliability value increment
  • A key line identification method and system based on reliability value increment
  • A key line identification method and system based on reliability value increment

Examples

Experimental program
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Embodiment Construction

[0022] In one embodiment, a method for identifying critical lines based on reliability value increment is provided, the method includes the following steps:

[0023] S100. Using the cross-entropy method to calculate the forced outage rate of the j-th line in the r-th simulation of the power system When r=1, u j Forced outage rate given for the jth line;

[0024] S200. Calculate the total average reliability increment of the jth line in the rth simulation j=1,2,...,L; L is the total number of lines in the power system; where:

[0025] is the average reliability value increment caused by the line outage of the jth line in the rth simulation;

[0026] is the average reliability value increment caused by the line capacity limitation of the jth line in the rth simulation;

[0027] S300. Calculate the relative error of the total reliability increment of the jth line of the rth simulation j=1,2,...,L;

[0028] S400, if Then execute step S500; otherwise, r=r+1, return...

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Abstract

The invention relates to a reliability value increment based method and system for identifying critical lines. According to the method and the system, on the basis of the consideration of electric power system reliability influenced by line cutoff and line capacity limitation, probability statistics is used for calculating average reliability increment brought from the line cutoff and line capacity limitation, the critical lines are searched through the ordering of total average reliability increments, and meanwhile, cross entropy method sampling simulation is used for accelerating the calculation process. The method and the system are quick in calculation, the identified critical lines are high in reliability, and a reliable and powerful decision basis can be provided for electric power system planning evaluation.

Description

technical field [0001] The present disclosure relates to the field of power system planning and evaluation, in particular to a method and system for identifying key lines based on reliability increments. The method and system can quickly identify key lines in the main network from the value increment of power grid reliability. Background technique [0002] Due to the long distance between my country's energy center and load center, the large-scale power transmission system has become an inevitable choice for energy transmission. In recent years, with the further development of new energy sources, new energy sources in the west and north have to be sent to load centers in the east, which has further promoted the construction of large-scale transmission systems such as UHV. At the same time, the interconnection between the regional grids also makes the power system develop towards a larger and more complex regional interconnected grid. In order to ensure the stable operation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06H02J3/00H02J2203/20Y02E40/70Y04S10/50
Inventor 刘慧超严超别朝红李更丰王灿徐欢米渊杨扬
Owner DATONG POWER SUPPLY COMPANY OF STATE GRID SHANXI ELECTRIC POWER