PROJECT TITLE :
A Natural-Sampling-Based SVM Scheme for Current Source Converter With Superior Low-Order Harmonics Performance
The device switching frequency of current source converters (CSCs) in high-power medium-voltage (MV) drive applications is generally around five hundred Hz. Conventional house vector modulation (SVM) options quick dynamic response but its output contains low-order harmonics with high magnitudes. During this paper, a natural-sampling-based mostly SVM (NS-SVM) theme is proposed to substantially suppress the low-order harmonics in sensible CSC-based mostly drives. This study proposes constant discretization of NS-SVM wherein natural sampling pulse width modulation performance can be achieved with regular sampling frequency (same as a conventional SVM) instead of a high or even infinite sampling frequency. Equations for natural-sampling-primarily based dwell time calculations for every selected vector are developed. The corresponding simplified but precise enough equations are derived on the premise of the Newton-Raphson algorithm to achieve quick on-line digital implementation. The proposed NS-SVM options superior low-order harmonic performance and inherits the high dynamic response and low sampling frequency of conventional SVM. Simulations and experiments are provided to verify the proposed NS-SVM scheme.
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