High-Power Rectifier Technologies for Hydrogen Electrolysis

In this contribution the development of hydrogen electrolysis and its requirements on power supply are reviewed first. To meet these requirements, virous rectifier technologies and devices are developed: primary power control technology for low-voltage high-current application; 2-stage solution consisting of a thyristor-diode front end and an interleaved IGBT chopper for multi-MW application with a DC output voltage up to 1000 V; unidirectional active front end solution with integrated polarization function for application up to 1500 V. All these technologies are verified by type tests and field application (except technology and product under development).