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Sensitivity analysis-based flexible AC-DC hybrid power grid reliability improvement method

An AC/DC hybrid and sensitivity analysis technology, applied in data processing applications, instruments, calculations, etc., can solve the problem of less reliability assessment research, lack of quantitative analysis of load reliability impact, and reliability improvement of flexible AC/DC hybrid power grids Insufficient method research and other issues

Inactive Publication Date: 2018-01-12
STATE GRID CORP OF CHINA +2
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Problems solved by technology

However, the current research on the reliability of AC / DC hybrid power grids is still in the early stage, and there are few studies on the reliability evaluation of actual AC / DC hybrid projects, and the impact of AC / DC hybrid and DC islands on the reliability of loads is lacking in quantification. Insufficient research on reliability improvement methods for flexible AC / DC hybrid power grids

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  • Sensitivity analysis-based flexible AC-DC hybrid power grid reliability improvement method
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  • Sensitivity analysis-based flexible AC-DC hybrid power grid reliability improvement method

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Embodiment Construction

[0049] The principle and specific implementation process of the present invention will be further illustrated and explained below, and with a more comprehensive understanding of the present invention, other objectives and results of the present invention will become clearer and easier to understand.

[0050] In the following description, numerous specific details are set forth for purposes of explanation. It may be evident, however, that these embodiments may be practiced without these specific details.

[0051] The reliability improvement method of the flexible AC / DC hybrid power grid based on sensitivity analysis provided by the present invention is aimed at the lack of quantitative analysis of the impact on the reliability of the AC / DC hybrid grid in the current grid reliability assessment, and the reliability of the flexible AC / DC hybrid grid. An understudied issue of lifting methods. This method first aims at the topological structure and function analysis of the flexibl...

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Abstract

The invention discloses a sensitivity analysis-based flexible AC-DC hybrid power grid reliability improvement method and belongs to the technical field of reliability evaluation for power systems. Themethod comprises the following steps of firstly, generating a reliability block diagram in two working modes of a DC power grid and an AC-DC hybrid power grid for the topological structure and the function analysis of the flexible AC-DC hybrid power grid; in combination with different reliability criteria, calculating the reliability index of a system; judging weak elements in the system throughthe sensitivity analysis of the reliability index. On the above basis, the reliability of weak elements in the system is analyzed in detail, and the sensitivity of a weak element forming part is analyzed by a perturbation method. In combination with the economic analysis, a component part for improving the reliability of elements is determined. Finally, a key element and a modification suggestionfor improving the reliability level of the system are finally determined. According to the invention, the method can be applied to the planning and operating stages of the power grid for analyzing theweak link of the system. The reliability level of the power grid is improved, and the later-stage upgrading and transforming process of the power grid can be guided. The method has important significance.

Description

technical field [0001] The invention relates to a method for improving the reliability of a flexible AC / DC hybrid power grid based on sensitivity analysis in a power system, and belongs to the field of power system reliability evaluation. Background technique [0002] Due to the imbalance of energy distribution and economic development, it is often necessary to transmit electric energy to the load center over long distances. DC transmission has obvious advantages in large-capacity and long-distance transmission. It has played an important role in my country's strategy of "transmitting power from west to east and connecting the whole country". AC-DC networking has become an important development trend of the future power grid. [0003] AC-DC interaction is an important research content of AC-DC hybrid power grid. The DC island system has no direct electrical connection with the AC grid, and the island avoids the mutual influence between AC and DC at the sending end. However...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/06
Inventor 罗金山程林刘栋张艳孙珂江轶刘满君
Owner STATE GRID CORP OF CHINA
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