Harmonic analysis on direct-current side of tokamak power supply under asymmetrical triggering

Tokamak is a promising device for using nuclear fusion energy, and the triggering of power supply has characteristics extreme asymmetry drastic instantaneous change, which bring spectrum-rich harmonics to DC side supply, threatening operational safety device. Although harmonic analysis method already exists, however, it still problem cumbersome inaccurate calculation when oriented systems with complex operation modes. Based on three-phase unified switching function, this paper introduces delay factor, establishes non-linear function model converter suitable case asymmetrical triggering. According principle method, frequency domain equation proposed obtained, then combined grid parameters, can be derived. The correctness theoretical verified by comparing results spectrum data obtained direct Fourier decomposition voltage.