Due to the spatial and temporal distribution of meteorological conditions along the transmission lines, the equivalent model with lumped parameters cannot accurately represent the line model with the actual parameters. In the paper, the nonuniform parameter model based on the dynamic thermal rating (DTR) technology of transmission lines is adopted to establish the power flow analysis model based on the conductor temperature. The algorithm presented in the paper is adopted to analyze the power flow of power networks with known load and meteorological parameters. And then cases with parameters of dierent seasons and spatial distribution in practical conditions are used to verify the feasibility of the algorithm. It is shown that the power flow analysis model established in this paper can realize the accurate analysis of the thermal load capacity of the transmission line in the power grid, which has great practical significance.
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