Electro-hydrogen production network access system

The invention relates to an electrical hydrogen production network access system. The system comprises a transformer, a rectifier transformer, an uncontrolled rectifier and a chopper, wherein the transformer, the rectifier transformer, the uncontrolled rectifier and the chopper are sequentially connected, the transformer is further connected to a power supply, and the chopper is further connected to the electrolytic bath; the transformer is used for converting a first alternating current input by a power supply into a second alternating current, and the voltage of the first alternating current is greater than that of the second alternating current; the rectifier transformer is used for converting the second alternating current into third alternating current, and the voltage of the second alternating current is larger than that of the third alternating current; the uncontrolled rectifier is used for converting the third alternating current into the first direct current; and the chopper is used for converting t