Direct-current circuit resonance analysis method and device, equipment and storage medium

Abstract

The invention discloses a direct-current circuit resonance analysis method and device, equipment and a storage medium. The direct-current loop resonance analysis method comprises the following steps: connecting a preset resistor in series with a first direct-current loop, wherein the preset resistor is used for accelerating attenuation of the first direct-current loop; determining a first impedance value changing along with the frequency after the attenuation of the first direct-current loop is completed; and determining a resonant frequency value of the first DC loop according to the first impedance value. According to the method, the effects of accelerating attenuation of the direct-current loop and improving the efficiency of resonance analysis of the direct-current loop are achieved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of DC power transmission, and in particular to a DC circuit resonance analysis method, device, equipment, and storage medium. Background technique [0002] For high-voltage direct current transmission projects, the generation of DC circuit resonance will affect the safe and stable operation of the system, so it is necessary to conduct resonance analysis on the DC circuit to determine the conditions for the resonance of the DC circuit to avoid resonance. [0003] The resonance analysis of the DC circuit is mainly carried out by analyzing the characteristics of the impedance change with the frequency in the DC circuit, and the impedance analysis of the DC circuit requires the attenuation of the DC component in the voltage signal or current signal obtained by simulation to be carried out correctly. Otherwise, the impedance analysis results will be inaccurate. [0004] However, when analyz...

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Problems solved by technology

[0003] The resonance analysis of the DC circuit is mainly carried out by analyzing the characteristics of the impedance change with the frequency in the DC circuit, and the impedance analysis of the DC circuit requires the attenuation of the DC component in the voltage signal or current signal obtained by simulation to be carried out correctly. analysis, otherwise the impedance analysis results will be inaccurate

[0004] However, when analyzing the impedance of the DC loop at present, the damping at the resonance point is very small, so the DC component decay time constant of the voltage and current of the DC loop is very large, resulting in a too long time for the DC component decay and convergence, so the simulation time needs to be continuously Lengthened, after the DC component decays, the signal can be extracted for Fourier analysis, which will seriously affect the simulation speed

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