The 5MW high-power IGBT hydrogen power supply developed by our company is suitable for IGBT full-control hydrogen power supply for PEM electrolyzer and alkaline electrolyzer. The experimental data show that the IGBT hydrogen production power supply has high efficiency, small ripple, precise control, high power factor, small harmonic, fast response and reactive power compensation ability, to meet the needs of large-scale green hydrogen production complex grid, can effectively improve the energy efficiency ratio of hydrogen production by electrolysis. The IGBT hydrogen-making power supply has better power quality in the grid side than that in the range of 30% -110% load, with a power factor of 0.99 and a harmonic better than 3% , the step response of resistive load can be less than 10ms, and the DC ripple is less than 1% . Compared with the traditional semi-controlled power supply, the IGBT hydrogen power supply has better adaptability to the new energy grid, and the power supply system is more efficient.