Available transfer capability calculation method based on improved multiple centrality-correction interior point method

Abstract

The invention discloses an available transfer capability calculation method based on the improved multiple centrality-correction interior point method. Power system basic trend parameters are acquired, initialization is performed, the complementary gap d<Gap> is calculated and convergence judgment is performed, the disturbance factor mu is calculated, the prediction direction and the correction are solved through the prediction-correction interior point method, the complementary gap d(^)<Gap> after prediction-correction is solved and weighting judgment is performed, the optimal weight is obtained through linear search, the optimized Newton direction is calculated, multiple centrality-correction is performed by taking the prediction correction direction of the prediction-correction interior point method as the affine direction, and the original and dual variables are updated. According to the invention, in each iteration process, the weighting process is performed on the correction direction in the prediction correction process selectively, the optimal ratio of the correction direction in the total Newton direction is determined through linear search, and the optimize prediction correction direction is taken as the affine direction of multiple centrality-correction, so not only the problem of misconvergence when PCIPM is used to solve ATC due to the wrong correction direction can be solved, and but also the defect of less iterative step size when MCCIPM is used to solve the ATC problem can be overcome.

Description

technical field [0001] The invention relates to the technical field of power transmission and distribution in electric power systems, in particular to a method for calculating available power transmission capacity. Background technique [0002] The power generation, power consumption, power market operation and system security and stability of the modern power system all have high requirements on the available transfer capability (ATC). an important part of . [0003] At present, ATC calculation methods are mainly divided into two categories: probabilistic solution and deterministic solution. Since the probability-based solution method has a relatively large amount of calculation and takes a relatively long time, from a practical point of view, a deterministic solution method is usually used to calculate the ATC. Among the deterministic methods, although the sensitivity analysis method has the advantage of calculation speed, the accuracy of the results is low due to the in...

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Problems solved by technology

However, in the actual simulation, when PCIPM solves ATC, it will not converge due to the wrong correction direction; while MCCIPM solves with a small iteration step size and too many iterations

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