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Partition optimization method and system for UHV AC/DC feed-in receiving-end power grid

A technology of receiving-end power grid and zoning optimization, applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve the problem of not fully reflecting the characteristics of UHV AC and DC feeding into the receiving-end power grid system

Active Publication Date: 2018-06-29
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

In recent years, clustering or classification methods based on various electrical distances have become the mainstream in the study of power grid partitioning problems, but these algorithms are mostly based on the structural characteristics of the power grid, or static indicators such as voltage-reactive power sensitivity, and rarely involve the dynamic electrical characteristics of the power grid , and cannot fully reflect the system characteristics of the UHV AC / DC fed into the receiving end grid

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  • Partition optimization method and system for UHV AC/DC feed-in receiving-end power grid

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Embodiment

[0160] Embodiment: The present invention takes the 2020 Beijing-Tianjin-Tangtang planning power grid as an object to verify the effectiveness of the proposed method.

[0161] In the Beijing-Tianjin-Tangshan planning power grid in 2020, there are 3 UHV substations in Beijing East, Beijing West, and Tianjin South, with 3 ±800 kV UHV DC feed-in, respectively located in Tangshan, Tianjin, and Langfang. Utilize the method proposed in the present invention to obtain the Pareto optimal solution, and the concrete grid partition scheme schematic diagram is as follows Figure 4 shown.

[0162] Carry out electrical simulation calculation on the partition plan, the power flow diagram is as follows Figure 5 shown. The results show that the short-circuit current is within the range of the interrupting capacity of the switch, the power flow distribution of the power grid is uniform, and the static safety requirements can be met under the "N-1" mode. The system is stable.

[0163] Those ...

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Abstract

The invention provides a partition optimization method and a partition optimization system for an UHV AC / DC feed-in receiving-end power grid. The partition optimization method comprises the steps of:determining a power grid key channel set of a power grid according to a power grid partitioning method based on a complex community structure theory; and performing multi-objective optimization iterative calculation on randomly generated partitioning schemes based on the power grid key channel set according to a non-dominated sorting genetic algorithm NSGA-II based on fast classification, so as toobtain the optimal partitioning scheme set. The partition optimization method and the partition optimization system combine the complex community structure theory with the non-dominated sorting genetic algorithm NSGA-II based on fast classification and apply them to grid planning, thus the problem of curse of dimensionality of a large power grid is avoided, and the method is simple, practical andhigh in operability.

Description

technical field [0001] The invention relates to a grid partition method and system, in particular to a partition optimization method and system for UHV AC / DC feeding into a receiving-end grid. Background technique [0002] Grid partitioning has always been an important issue in grid planning, and this issue will become more prominent for receiving grids with intensive UHV AC and DC feeds. For the traditional power grid with 500 kV as the main grid, the division of the power grid is mainly based on the long-term accumulated operating experience of administrative regions and operators, and usually rarely changes. Especially with the development of UHV power grid, 1000 / 500 kV electromagnetic ring network will be gradually formed, the concept of administrative area of ​​large power grid is gradually weakened, and the traditional zoning method often cannot reflect the actual zoning characteristics of the power grid. [0003] Grid partitioning can be regarded as a combinatorial o...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 覃琴施浩波韩奕周勤勇张一驰苏丽宁
Owner CHINA ELECTRIC POWER RES INST
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