"Shinsuke Yonetani,Yohei Kondo,Hirofumi Akagi,Hideaki Fujita","A 6.6-kV Transformerless STATCOM Based on a Five-Level Diode-Clamped PWM Converter: System Design and Experimentation of a 200-V 10-kVA Laboratory Model",,"IEEE Transactions on Industry Applications","IEEE","vol. 44","no. 2","pp. 672-680",2008,Mar.