Power grid risk comprehensive assessment method based on improved power betweenness

A comprehensive evaluation and power technology, applied in the field of power transmission and distribution, can solve problems such as difficult objective evaluation of power grid risks

Inactive Publication Date: 2017-04-26
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Description
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Problems solved by technology

However, most existing risk assessment methods do not fully consider the impact of gr...

Method used

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  • Power grid risk comprehensive assessment method based on improved power betweenness
  • Power grid risk comprehensive assessment method based on improved power betweenness
  • Power grid risk comprehensive assessment method based on improved power betweenness

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Embodiment

[0185] The present invention uses IEEE30 nodes for simulation analysis. During the calculation and analysis process, the relative economic factors of the loads carried by nodes 15, 18, and 20 are set to 1.5, and the relative economic factors of other load nodes and generator nodes are all 1.

[0186] The non-sequential Monte Carlo method is used to sample the grid state 10,000 times, and the grid network efficiency, power flow entropy, voltage offset severity, and load loss severity based on the improved power betweenness proposed by the present invention are calculated. The final grid risk ranking results are shown in Table 2:

[0187] Table 2 Power Grid Accident Risk Sorting

[0188]

[0189] It can be seen from Table 2 that since generator 1 is a balanced node, when line L 1 , L 2 When a fault occurs, the power grid will be disconnected, so L 1 , L 2 The consequences of line failure are extremely serious. In the embodiment of the present invention, it is considered ...

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Abstract

A power grid risk comprehensive assessment method based on improved power betweenness is used for objectively evaluating power grid risks. The technical scheme is that the method first calculates improved power betweenness of each node and line; then the improved power bewteenness is introduced into a power grid fault consequence severity index, thereby obtaining a power grid fault consequence severity index based on improved power betweenness; then an intuition fuzzy analytic hierarchy process is adopted to make a comprehensive assessment of a fault severity index, and an evaluation result and a power grid fault probability are combined, thereby obtaining a final power grid risk value; and finally, power grid risks are accurately assessed according to the final power grid risk value. The power grid risk comprehensive assessment method based improved power betweenness introduces the improved power betweenness into the power grid fault consequence severity index, so that each index contains consideration of influence on a load side in a calculation process, and the overall fault severity evaluation result is relatively reasonable. The power grid risk comprehensive assessment method based improved power betweenness can comprehensively, objectively and accurately make an evaluation of power grid risks.

Description

technical field [0001] The invention relates to a comprehensive assessment method of grid risk considering the influence of grid faults on the load side, which can objectively evaluate the grid risk and belongs to the technical field of power transmission and distribution. Background technique [0002] With the rapid development of the national economy, the demand for power resources is increasing. As the interconnection between the power grids is getting closer, once the power grid fails, it will have a serious impact on the social economy. Therefore, under the current background of rapid social and economic development, it is of great significance to accurately assess the risk of power grid failure. [0003] Both the power authority and the power companies stipulate that after a power system failure occurs, the impact of the power accident on the user side should be focused on when determining the severity level of the accident. Therefore, it is necessary to consider the ...

Claims

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Application Information

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IPC IPC(8): G06Q50/06
CPCG06Q50/06
Inventor 栗然翟晨曦李永彬吕子遇孙奇
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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