Independent control of input current and output voltage for Modular Matrix Converter

Independent control of input current, load and capacitor voltage balancing for a modular matrix converter

“…In a three-phase MMxC system, there are many states for the space vector modulation technique, which complicates the control algorithm. However, carrier based PWM technique, which provide simple control technique, has been proposed in [8]- [13] for controlling the MMxC arm capacitor voltages, load voltage and input current. In [8], [9], independent control of the input and output MMxC currents using the inner current loops and the capacitor voltages balancing using the outer energy balancing control has been proposed considering the negative-sequence current control.…”

“…However, there is no experimental verification. In [13], the authors has proposed a simple control technique for controlling the MMxC q-axis arm currents in order to eliminate the double frequency components.…”

“…MMxC is a multi-level converter without a transformer that converts from the high voltage AC to high voltage AC with arbitrary amplitude and frequency. Recent research has been focused on the control methods of the MMxC and its applications in machine drives and renewable energy [1]- [13]. Most of them have been designed based on space vector modulation technique, which is a complicated method due to the increased number of sectors and related vector lengths [1]- [7].…”

An Overview of Modelling Techniques and Control Strategies for Modular Multilevel Matrix Converters

“…This strategy can be easily implemented in the natural a − b − c frame. In general, NSCR-based balancing nested control loops are utilised, with an internal cluster current control system and an external control loop for CCV Balancing Control [58,59,63].…”

“…Then, an active power component flows among different clusters to balance the capacitor voltages. Although the NCSR is a simple and straightforward strategy, the regulation of the converter is not entirely decoupled, and the control of the floating capacitor voltages affect either the input or the output ports [35,54,55,58,59,[63][64][65]. It is important to mention that all these papers have considered DFM operation of the M 3 C only.…”