Novel Three-Phase Efficient Power Supply for Hydrogen Production Using Active Voltage Injection Method

To optimize the hydrogen production efficiency of proton exchange membrane (PEM) electrolysis, a high-efficiency hybrid hydrogen production power supply, based on a 12-pulse rectification combined with an active pulse multiplication unit (APMU), is proposed. The system specifically employs a 12-pulse rectifier to manage 96.6% of the rated power, while the APMU handles the remaining component. Additionally, an optimized APMU is used to enhance original 12-pulse rectifier to 48-pulse rectifier. As a result, this hydrogen power supply demonstrates low grid-side harmonics, minimal output ripple, and high transmission efficiency. This research systematically analyzes the fundamental operating mechanisms, deriving its theoretical grid-side harmonics and output ripple, and evaluating the APMU's capacity. Finally, an experimental prototype with a 2.2 kW output power is developed to test and validate the proposed method.