Smoothing reactor broadband electromagnetic transient analysis equivalent circuit based on transmission line structures

Abstract

The invention relates to a smoothing reactor broadband electromagnetic transient analysis model based on transmission line structures, in particular to a smoothing reactor broadband electromagnetic transient analysis equivalent circuit based on transmission line structures which belongs to the field of electromagnetic transient broadband models for power systems. n like smoothing reactor unit length broadband equivalent circuits are sequentially connected in series to form the equivalent circuit provided by the invention, so that a plurality of distributed transmission line structures are formed, and the distributed transmission line structures are utilized to simulate the transmission of the transient wave process in a smoothing reactor. The smoothing reactor broadband electromagnetic transient analysis equivalent circuit takes the changes of parasitic capacitance, stray inductance and winding resistance of distribution parameters of the smoothing reactor under the high-frequency skin effect and the proximity effect into consideration, and can accurately simulate the electromagnetic transient of the smoothing reactor under power frequency characteristics and disturbance characteristics.

Description

technical field [0001] The invention belongs to the field of electromagnetic transient broadband models of electric power systems, and in particular relates to a broadband electromagnetic transient analysis equivalent circuit based on a transmission line structure, which considers the parasitic capacitance, The change of stray inductance and winding resistance is suitable for the electromagnetic transient analysis of the smoothing reactor of the DC transmission system and the analysis of the electromagnetic disturbance level of the DC field conduction. Background technique [0002] The smoothing reactor is one of the main equipments in the HVDC converter station, and it is the key equipment connecting the converter valve and the DC side. The accuracy of the smoothing reactor broadband equivalent circuit model directly affects the validity of the calculation of the electromagnetic disturbance level of the DC field conduction, and then affects the accuracy of the prediction of...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the invention is to overcome the deficiencies of the prior art, to propose a smoothing reactor broadband electromagnetic transient analysis equivalent circuit based on the transmission line structure, the present invention is based on the unit length equivalent circuit of the smoothing reactor, Considering the changes of parasitic capacitance, stray inductance and winding resistance of smoothing reactor distribution parameters under the action of high-frequency skin effect and proximity effect, it solves the problem that the existing reactor model cannot meet the electromagnetic transient analysis under disturbance conditions. It has outstanding advantages in the electromagnetic transient analysis of the smoothing reactor of the DC transmission system and the analysis of the electromagnetic disturbance level of the DC field conduction

Images