Reliability evaluation method and system for alternating current and direct current hybrid power distribution network

By establishing and solving the optimal current calculation model of the distribution network, evaluating the reliability of the AC-DC hybrid distribution network, the problem of insufficient reliability evaluation accuracy in the prior art is solved, and higher evaluation accuracy is achieved.

CN119651624APending Publication Date: 2025-03-18STATE GRID FUJIAN POWER ELECTRIC CO ECONOMIC RESEARCH INSTITUTE +1
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Patent Information

Application Number
CN202411946211.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-27
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

The prior art is inadequate in evaluating the reliability of AC and DC hybrid distribution networks, resulting in the inability to effectively operate and plan the distribution network.

Method used

By establishing the optimal current calculation model of the distribution network, the model is solved to obtain the optimal supply path for each load node, the reliability evaluation parameters of the network structure based on these supply paths are calculated, and the reliability index is then calculated.

Benefits of technology

This method can clearly characterize the network topology structure and calculate the reliability indicators under different network structures without heuristic algorithms, which improves the accuracy of reliability evaluation of AC and DC hybrid distribution networks.

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Abstract

The invention discloses a reliability evaluation method and system for an AC-DC hybrid power distribution network, and the method comprises the steps: building an optimal power flow calculation model of the power distribution network, solving the optimal power flow calculation model, obtaining an optimal power supply path of each load node, calculating the reliability evaluation parameters of a network structure based on the optimal power supply path of each load node, and carrying out the calculation of the reliability evaluation parameters. And calculating a reliability index of a network structure of an optimal power supply path based on each load node according to the reliability evaluation parameters, so that a network topology structure can be clearly represented by solving an optimal power flow calculation model, and then calculating reliability indexes under different network structures. The reliability evaluation of the AC / DC hybrid power distribution network can be realized without a heuristic algorithm, so that the accuracy of reliability evaluation of the AC / DC hybrid power distribution network is improved.
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