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Calculation method and device for power grid line vulnerability

A calculation method and vulnerability technology, applied in the field of power system, can solve the problems of complex calculation process, insufficient combination of physical characteristics of power grid, and fragile power grid lines.

Active Publication Date: 2018-05-15
HUIZHOU POWER SUPPLY BUREAU OF GUANGDONG POWER GRID CO LTD +1
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  • Abstract
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Problems solved by technology

[0007] Based on this, it is necessary to provide a power grid line vulnerability method for the above-mentioned various methods, which are complex in the calculation process, not closely integrated with the physical characteristics of the power grid itself, and fail to consider the transmission capacity and operating status of the line in the evaluation process. calculation method

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  • Calculation method and device for power grid line vulnerability
  • Calculation method and device for power grid line vulnerability
  • Calculation method and device for power grid line vulnerability

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Embodiment Construction

[0033] In order to better understand the purpose, technical solution and technical effect of the present invention, the present invention will be further explained below in conjunction with the accompanying drawings and embodiments. At the same time, it is stated that the embodiments described below are only used to explain the present invention, and are not intended to limit the present invention.

[0034] In one embodiment, as figure 1 As shown, it is a method for calculating the vulnerability of power grid lines of an embodiment, including steps:

[0035] S101. According to the power grid topology and power supply load distribution, calculate the probability of grid line disconnection due to overload due to random load fluctuations, and calculate the relative probability of line disconnection according to the probability of line disconnection and the failure rate of the line itself.

[0036] S102. Calculate the comprehensive load rate and power flow entropy of the line dur...

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Abstract

The invention relates to a calculation method and device for power grid line vulnerability. The calculation method comprises the following steps that: calculating the off-on relative probability of the line; calculating the initial unit entropy comprehensive loading rate of a power grid; calculating the importance degree of each node of a power grid; calculating the off-on consequence of the line; and calculating the product of the off-on relative probability of the line and the off-on consequence of the line, and taking the product as the vulnerability of the circuit. By use of the technical scheme provided by the invention, the physical characteristics of a power grid topological structure are fully considered, the physical states of each line and each node in the power grid topological structure a are fully combined, and the power grid line vulnerability obtained by calculation can more reasonably and comprehensively distinguish the vulnerable line of the power grid.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a calculation method and device for the vulnerability of grid lines. Background technique [0002] In recent years, the frequent occurrence of large-scale power outages has aroused people's attention to the vulnerability of power grids. Studies have shown that large-scale power outages are caused by external or internal vulnerable sources that cause some vulnerable lines in the power grid to withdraw from operation, causing large-scale power flow transfer, and then leading to cascading failures. External vulnerability sources are mainly natural disasters, such as typhoons, earthquakes, etc.; internal vulnerability sources are mainly overload, component failures, control protection and system failures. In a large-scale blackout accident, a small number of vulnerable lines are often the main reason for the propagation of cascading faults. Therefore, it is of great significance to acc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 林冠强李惠松叶晓君王英民吕云峰莫天文朱凌孙迪飞单政博王慧芳刘远威
Owner HUIZHOU POWER SUPPLY BUREAU OF GUANGDONG POWER GRID CO LTD
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