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Multiple-DC (direct current)-droppoint selection method based on multiple feed-in short circuit ratios

A technology of multi-infeed short-circuit ratio and DC drop point, applied in the direction of circuit devices, AC network circuits, electrical components, etc., can solve problems that are difficult, the methods and means are very different, and it is difficult to design decision-making methods

Active Publication Date: 2012-08-01
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The above-mentioned aspects belong to different technical fields, and each aspect may also include multiple factors that need to be considered. Therefore, in the demonstration of power grid planning, the methods and means selected are very different, and it is difficult to use mathematical methods to describe the relationship between factors in different aspects. relationship, it is difficult to design a decision-making method that can take into account the above factors at the same time

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  • Multiple-DC (direct current)-droppoint selection method based on multiple feed-in short circuit ratios
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  • Multiple-DC (direct current)-droppoint selection method based on multiple feed-in short circuit ratios

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Embodiment

[0097] The present invention takes East China multi-DC feed-in planning system as an object to verify the effectiveness of the proposed method. In 2012, 6 circuits of direct current have been fed into the East China Power Grid, of which 4 circuits are located in Shanghai, and 2 circuits are located in Jiangsu. In the demonstration of the planning scheme, it is assumed that five additional ±800kV UHV multi-DC locations will be added in the Jiangsu area. According to the above conditions, the drop points of the 6-circuit DC system are known in the calculation, and the drop points of the remaining 5 circuits of DC systems are optimally selected by using the method proposed in the present invention.

[0098]First, using PSD-SCCPC (Power Grid Technology, Vol. 35, No. 8, August 2011, The influence of load model on the calculation of short-circuit current in power system, Liu Nan, Tang Xiaojun, Ma Shiying, Wu Lihua, Hu Yusheng, Yao Shuling, Tian Hua ; Electric Power System Automatio...

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Abstract

The invention relates to a multiple-DC(direct current)-droppoint selection method based on multiple feed-in short circuit ratios, which comprises the following steps of: calculating the multiple feed-in short circuit ratio set M, determining a multiple-DC(direct current)-droppoint scheme, calculating integrated indexes of the scheme, calculating the balance indexes of the scheme, calculating interference indexes of the scheme, standardizing data results of an index matrix, formulating a multiple-DC-droppoint selection strategy, calculating assessed values, comparing the assessed values, selecting the optimal multiple-DC-droppoint scheme under the condition of an AC(alternating current) grid structure, adjusting the AC grid structure, returning to the first step, and comparing the optimal multiple-DC-droppoint schemes under the condition of the AC grid structure. The multiple-DC-droppoint selection method provides assessment indexes and technical basis for the planning and the design of a multiple-DC feed-in power grid, and has the characteristics of simpleness, practical use and strong operability.

Description

technical field [0001] The invention belongs to the field of power system planning, and in particular relates to a method for selecting multiple direct current drop points based on multiple feed-in short-circuit ratios. Background technique [0002] The optimal selection of multiple DC drop points has always been an important issue faced by power grid planning. For the receiving end grid with multiple DC intensive feeds, this problem will be more prominent. Reasonable selection of drop points will greatly improve the safe and stable operation of the power grid. . Optimal selection of multi-DC drop points is a very complex system decision-making problem, which involves many aspects such as decision-making purpose, system safety, economy, and project implementation. The above-mentioned aspects belong to different technical fields, and each aspect may also include multiple factors that need to be considered. Therefore, in the demonstration of power grid planning, the methods a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 郭小江
Owner CHINA ELECTRIC POWER RES INST
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