Amin Zabihinejad and  Philippe Viarouge,  Design of Direct Power Controller for a High Power Neutral Point Clamped Converter Using Real Time Simulator.   journal   = {International Journal of Energy and Power Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2015, vol. 98(2). 526 - 532
    [viewed 20 October 2019]. Available from: https://publications.waset.org/pdf/10001134.