Power flow calculation method of power distribution network comprising solid-state transformer

Abstract

The invention relates to a power flow calculation method of a power distribution network comprising a solid-state transformer. The method comprises the steps of A, building a steady-stage physical model of the solid-state transformer; B, analyzing characteristic of each component in the network, and listing a characteristic equation of the component; C, solving power flow distribution of the powerdistribution network comprising the solid-state transformer by an expansion node method-based Newton method; and D, analyzing a power flow calculation result, and verifying correctness and effectiveness of the proposed algorithm. By the power flow calculation method of the power distribution network comprising the solid-state transformer, the physical model of the solid-state transformer is determined, the defect that the internal power flow of the solid-state transformer cannot be calculated by a current algorithm is overcome, the power flow calculation process of the traditional Newton method is simplified by the expansion node method, and the improved algorithm is clear and simple in process, good in convergence and rapid in calculation speed.

Description

technical field [0001] The invention relates to the field of power systems, in particular to the calculation of the power flow of distribution networks. Background technique [0002] The access of high-penetration renewable energy and energy storage equipment and the continuous growth of controllable load will promote the development of the future distribution network to support flexible access and exit of renewable energy, compatibility with various new technologies, two-way flow of power, intelligent The traditional distribution network can no longer meet the needs of construction. A solid-state transformer is a static electrical device that combines power electronic conversion technology with high-frequency power conversion technology based on the principle of electromagnetic induction to convert electrical energy of one electrical characteristic into electrical energy of another electrical characteristic. Compared with conventional transformers, solid-state transformers...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the purpose of the present invention is to overcome the deficiencies of the prior art, determine the power flow calculation model of the solid-state transformer, and overcome the shortcoming that the current algorithm cannot calculate the internal power flow of the solid-state transformer

Images