2009•Unpublished venueRequires access

Development of STATCOM with gradationally controlled voltage inverter

Yukimori Kishida, Nobuhiko Hatano, Akihiko Iwata

Abstract

This paper presents the STATCOM using gradationally controlled voltage inverter. It consists of three inverter units connected in series, and each inverter unit generates a different output voltage such as Vc, 2 Vc, 4 Vc. This inverter can output 15 levels of voltage waveform by combinational output voltage of inverter units. The inverter units of output voltage 2 Vc, 4 Vc supply reactive power by a low switching frequency operation. The other inverter unit of output voltage Vc forms current waveform by PWM operation. Thus it can unite a low loss and a high quality. In this paper, we show the technique to apply STATCOM using the inverter system, and its experimental results.

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Key concepts: Inverter, Waveform, Grid-tie inverter, Voltage, Pulse-width modulation, Power (physics), AC power, Computer science