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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

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4 Author(s)
Akagi, H. ; Tokyo Inst. of Technol., Tokyo ; Fujita, H. ; Yonetani, S. ; Kondo, Y.

This paper discusses the potential of a transformerless STATic synchronous COMpensator (STATCOM) intended for installation on the 6.6-kV industrial and utility distribution systems. The STATCOM consists of a five-level diode-clamped pulsewidth-modulation converter rated at 1 MVA and a voltage-balancing circuit rated at 6 kVA. Moreover, this paper designs, constructs, and tests a 200-V 10-kVA STATCOM based on a five-level converter with a carrier frequency of 3 kHz and a voltage-balancing circuit with a switching frequency of 3 kHz. The STATCOM and its experimental waveforms verify the viability and effectiveness of the 6.6-kV transformerless STATCOM.

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Industry Applications, IEEE Transactions on  (Volume:44 ,  Issue: 2 )