Regional power grid flexible interconnection planning method giving consideration to global consumption capability and investment income of new energy

By establishing a two-layer planning model and an improved multi-objective particle swarm algorithm, the installation capacity and site selection location of the flexible interconnection device are optimized, and the problem of difficulty in effectively planning the DC connection line between regions in the existing technology is solved, and the flexible consumption of new energy and mutual resource assistance between regional power grids is achieved, taking into account investment returns.

CN119651626APending Publication Date: 2025-03-18STATE GRID JIANGSU ELECTRIC POWER CO LTD +3
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Patent Information

Application Number
CN202411462042.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-18
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

It is difficult for the existing technology to effectively plan DC connection lines between regions and select appropriate DC connection nodes and line capacity while maintaining investment returns, so as to maximize the flexible consumption of new energy and mutual resource assistance between regional power grids, and reduce wind and light abandonment.

Method used

A flexible interconnection planning method for regional power grids is proposed. By establishing a double-layer planning model and combining with an improved multi-objective particle swarm algorithm, the installation capacity and location of the flexible interconnection device are optimized to ensure both the benefits of new energy consumption and investment returns.

Benefits of technology

On the basis of ensuring investment returns, it has improved the new energy consumption capacity and power supply reliability of regional power grids, reduced the boost/download transmission of electricity, and alleviated the problem of congestion in the main grid transmission trend.

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Abstract

The invention relates to a regional power grid flexible interconnection planning method giving consideration to global consumption capability and investment income of new energy. The method comprises the following steps: firstly, constructing a regional power grid flexible interconnection device locating and sizing and new energy consumption index evaluation system and a to-be-planned interconnection line position-capacity set; secondly, a regional power grid flexible interconnection double-layer planning model is constructed, an upper layer decides an interconnection device locating and sizing scheme, and a lower layer evaluates the system new energy consumption capability after the flexible device is constructed and decides the new energy grid-connected access quantity; and finally, determining a target planning scheme by adopting an improved multi-target particle swarm algorithm. According to the method, the new technology of flexible interconnection between regional power grids is considered, and the model selection, site selection and capacity determination scheme of the cross-regional interconnection line is determined through the new indexes of the node topology connection degree, the neighbor node center support force and the node vulnerability resistance, so that the problem that the traditional regional power grid planning method cannot directly match the source load is solved; and the capability of flexible consumption of new energy and mutual aid of resources among regional power grids is improved.
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