A DC near-zone asset division method based on power flow contribution

Abstract

The invention discloses a direct current near-area asset division method based on the power flow contribution degree. The power flow in the equipment is divided into alternating current grids and direct current transmission projects according to different service objects by using the power flow tracking method, and the power flow contribution degree is calculated according to the power flow tracking result. The power flow contribution index includes electric energy transmission, peak transmission power, annual use time and dominant use time, and then the subjective and objective weights and the TOPSIS method are used to evaluate the power flow contribution index, and then the DC near-zone assets are divided. The invention can clearly, clearly and scientifically divide the near-area assets of the DC transmission project according to the historical trend data, effectively solves the problem of unclear division of the existing near-area assets at the DC transmission end, and can straighten out the existing transmission prices. The system is conducive to the orderly delivery of clean energy such as hydropower.

Description

technical field [0001] The invention relates to the field of distribution network planning, in particular to a direct current near-area asset division method based on power flow contribution. Background technique [0002] The DC near-zone assets are some of the assets in the AC power grid that mainly serve DC transmission projects. Their division directly affects the approval of the DC special transmission price and the provincial grid transmission price, which in turn affects the orderly delivery of clean energy. At present, the existing three-layer transmission and distribution price system for special projects, regional power grids, and provincial power grids has problems that the provincial companies and regional branches where the sending end is located are not uniformly charged, and the division of property rights of nearby assets and the subject of charging are not clear. . Especially for the DC transmission project constructed under the condition of the existing AC ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of unclear division of assets in the vicinity of the DC transmission end, straighten out the existing three-tier power transmission and distribution price system for special projects, regional power grids, and provincial power grids, and ensure the orderly implementation of national energy strategies such as west-to-east power transmission , the present invention provides a DC near-area assets division method based on power flow contribution. According to the established power flow contribution index system, the contribution of the equipment when serving the DC transmission project and the AC power grid is calculated through the power flow tracking method. According to the obtained power flow contribution, it is judged whether the equipment is included in the DC near area assets

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