TY - SER AU - Srirattanawichaikul, Watcharin AU - Kumsuwan, Yuttana AU - Premrudeeprchacharn, Sutticha TI - Modified Unipolar Carrier-Based Based Pwm Strategy for Three-Level Neutral-Point Clamped Voltage Source Inverters KW - Three-Level Converters KW - Multilevel Converter Hvdc (Mmc-Hvdc) Systems KW - Carrier-Mediated Transport ER -