Series Connected Active Power Buffer Using a Coupled Inductor for a Grid Inverter
Conference: PCIM Conference 2025 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/06/2025 - 05/08/2025 at Nürnberg, Germany
doi:10.30420/566541188
Proceedings: PCIM Conference 2025
Pages: Language: englishTyp: PDF
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Authors:
Weiler, Pelle; Fujita, Toshiyuki; Fujimoto, Hiroshi; Miyajima, Takayuki; Yasuda, Yoshiko; Yamagiwa, Akio
Abstract:
This work investigates the use and control of a coupled inductor in a series-connected active-power buffer to further reduce the size of passive components. Using the coupled inductor as a current-source, a control scheme is proposed to maintain constant dc input power, despite the output power ripple at twice the grid frequency. Feed-forward and gain compensation in control of the dc and buffer voltages ensures stable operation under transient loads. A small scale prototype with a coupled-inductor and gallium-nitride devices is presented and experimentally verified.