A Simplified Current Source Converter SPWM Online Mapping Scheme

This paper introduces an online mapping scheme for current source converters (CSC). This scheme is capable of transforming the gating signals from conventional voltage source converters (VSC) utilizing sinusoidal pulse width modulation (SPWM) techniques into signals suitable for CSC operation. The proposed mapping table is designed for straightforward implementation and follows to the operational constraints of CSCs, including the maintenance of continuous input current and the prevention of simultaneous activation of more than one top or bottom switches of the CSC circuit. The effectiveness of the proposed online CSC mapping table and the associated control strategy was evaluated using PSCAD/EMTDC simulation software. The simulation results confirm that the mapping scheme successfully meets the operational constraints of the CSC while producing a high-quality sinusoidal load current with low total harmonic distortion (THD). Furthermore, the proposed control strategy effectively tracks the reference output load voltage, representing satisfactory dynamic performance.