Design and Characteristics of a Two-level VSC with a Third-Harmonic Injection Bus-clamping SVM– Detailed Study

At present, power electronics-based technologies are widely penetrating the power systems in an effort towards “smart-oriented” operational systems. Voltage-sourced converters (VSCs) are such power electronics-based technologies that currently seem rather to preponderate in many promising applications including FACTs, HVDC grids, DGs and VSDs. VSCs are found in a plethora of structures ranging from a simple half-bridge to an advanced modular topology and in order to exploit all their possible inherent features, a number of modulation strategies have been established. This paper investigates holistically the 3Φ two-level VSC with a 3 rd harmonic injection bus-clamping space-vector modulation. It is essentially envisioned to further [7]-[8] studies, which compare two common VSC topologies, by including the abovementioned bus-clamping topology. The modulation strategy implemented through the principle of the equivalence linear trianglecomparison-based PWM with a bus-clamping SVM, mainly the MAX and MIN bus-clamping schemes. The resultant asynchronised SV-PWM has been investigated with a passive RL load and an active asynchronous vector-controlled motor with the aid of Simulink® simulated models. Index Words: Voltage Sourced Converter (VSC), SVPWM, Bus-clamping control strategy, THD%, Induction motor