AC-DC hybrid grid cascading failure fragile source identification method

A technology of AC-DC hybrid connection and cascading faults, which is applied in the direction of AC-DC network circuit layout, fault location, and measurement of electricity, can solve problems such as endangering other components and fault spread, reduce work intensity and pressure, and operate in a reasonable and reliable manner , the effect of shortening the compilation cycle

Inactive Publication Date: 2017-12-26
CHINA SOUTHERN POWER GRID COMPANY +1
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Problems solved by technology

Due to the correlation between components, when a component fails, it will endanger other components. If the impact of this correlation reaction is gradually strengthened, it will cause the fault to spread further

Method used

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  • AC-DC hybrid grid cascading failure fragile source identification method

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Embodiment Construction

[0019] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the technical solutions of the present invention will be described in further non-limiting detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] figure 1 The identification method of the vulnerable source of cascading faults in the AC-DC hybrid grid includes the following steps:

[0021] Step 1. Data read in:

[0022] Select the corresponding BPA data file under this operation mode, use the custom data interface module to analyze the original data report in BPA power flow format containing the network structure and operation data of the evaluated power system, and perform power flow calculation for the AC / DC hybrid power system .

[0023] Step 2. Component vulnerability analysis:

[0024] a) Calculate the vulnerability of each component, which is related to the initial grid operation mode and grid structure;

[00...

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Abstract

The invention discloses an AC-DC hybrid grid cascading failure fragile source identification method. The method comprises the steps of data reading, element fragile degree analysis, failure analysis and identification early warning. By means of the method, a fragile source truly causing power system collapse and a formed failure chain can be found out, a computed result can be put into BPA software to conduct failure calculation and verification, operating personnel can generate early warning strategies and solutions in advance for fail links, when a single failure occurs in a grid, cascading failures cannot be caused to cause system collapse, and the grid is made to be in a safe and stable operation mode all the time.

Description

technical field [0001] The invention relates to the field of cascading fault analysis of power systems, in particular to an identification method for vulnerable sources of cascading faults in AC / DC hybrid power grids. Background technique [0002] With the gradual expansion of the scale and capacity of the power system, it has become a trend to interconnect the power grids in major regions of the country through UHV DC and HV AC lines. The interconnection of the grid improves the reliability and economy of the grid, but the interconnection will also make the dynamic behavior of the grid more complicated, and the subsequent cascading failures will cause serious losses due to power disasters. [0003] The evolution mechanism of cascading failures in power systems is usually manifested as: under the influence of various factors at each stage, the failure of one or more components leads to a large-scale transfer of power flow, causing overload tripping of other transmission line...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J4/00G01R31/08
CPCG01R31/088H02J4/00
Inventor 周华锋胡荣韦鑫侯佳佐胡亚平赵化时万民惠宋安君朱建行
Owner CHINA SOUTHERN POWER GRID COMPANY
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