A Numerical Matrix-Based Method for Stability and Power Quality Studies Based on Harmonic Transfer Functions

摘要: Some couplings exist between the positive- and negative-sequence impedances of a voltage-sourced power converter especially in low frequency range due to nonlinearities low-bandwidth control loops such as phase-locked loop. In this paper, new numerical method based on harmonic transfer function for analysis linear time periodic systems is presented, which able handle these couplings. balanced three-phase system, there only one coupling term, but an unbalanced (asymmetrical) are more couplings, therefore, order study interactions matrix-based should be used. No information about structure needed elements modeled black boxes with known terminal characteristics. The proposed applicable both quality (harmonic interharmonic emissions) stability studies, verified by simulations paper.