An efficient tracing and optimization method for ac power flow calculation non-convergence problem based on linear optimal power flow

By constructing an optimization adjustment model based on linear optimal power flow, introducing power flow non-convergence source constraints, and identifying the correlation between branch phase angle difference and node voltage, the problem of AC power flow non-convergence was solved, achieving efficient power flow convergence optimization adjustment and improving the operation quality of the power grid.

CN122512440APending Publication Date: 2026-08-04CHONGQING UNIV
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Patent Information

Application Number
CN202610586152.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-29
Publication Date
2026-08-04

AI Technical Summary

Technical Problem

Existing methods cannot effectively trace and optimize the problem of non-convergence of AC power flow, especially in new power systems where non-convergence of power flow calculation is caused by unreasonable active or reactive power injection. Traditional manual adjustments are difficult to meet the needs of high-quality development of the power grid.

Method used

An optimization and adjustment model based on linear optimal power flow is constructed, and a power flow non-convergence source tracing constraint is introduced. By identifying branch phase angle difference and node voltage correlation constraints, and combining historical operating data, a reasonable operating boundary is determined, and the optimization and adjustment model is optimized to achieve power flow convergence.

Benefits of technology

It enables precise source tracing and rapid compensation for AC power flow non-convergence, ensuring the rationality of power flow distribution, reducing the workload of manual adjustments, and improving the safe and economical operation of the power grid.

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Abstract

The application discloses an efficient tracing and optimization adjustment method for AC power flow calculation non-convergence problems based on linear optimal power flow, and first, an operation condition of AC power flow non-convergence is acquired; second, an optimization adjustment model based on linear optimal power flow is constructed; then, a power flow non-convergence tracing constraint is introduced into the optimization adjustment model, so as to construct a power flow convergence optimization adjustment model; next, the operation condition of AC power flow non-convergence is input into the power flow convergence optimization adjustment model, and non-zero power relaxation amounts P1, P2, P3 and P4 are solved; finally, based on the non-zero power relaxation amounts P1, P2, P3 and P4, power compensation is performed on corresponding nodes, the power flow distribution is changed, and AC power flow convergence is realized.
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