Hydrogen production power supply is a device that converts AC or DC electricity into DC electricity suitable for electrolysis of water to produce hydrogen. Hydrogen production power supply is an important component of the hydrogen production process, and its performance and efficiency directly affect the quality and cost of hydrogen production. The main functions of hydrogen production power supply are:
Provide stable and reliable DC voltage and current to meet the needs of different types and scales of electrolytic cells;
Adjust the output voltage and current, optimize electrolysis efficiency and energy consumption based on water quality and hydrogen production requirements;
Adapt to the fluctuation characteristics of renewable energy and achieve green and carbon free hydrogen production;
L has protective functions such as overcurrent, overvoltage, overheating, and shortage, ensuring the safety of equipment and personnel.
The main types of hydrogen production power sources include:
DC power supply: converts alternating current into direct current, suitable for conventional alkaline or acidic electrolytic cells, with an output voltage generally between 100-500V and an output power generally between 10-1000kW;
Pulse power supply: converts direct current into a pulse waveform of direct current, suitable for high-efficiency solid oxide or proton exchange membrane (PEM) electrolysis cells, with an output voltage generally between 1-10V and an output power generally between 1-100kW;
AC power supply: converts AC power into high-frequency AC power, suitable for high-efficiency ultrasonic or microwave assisted electrolytic cells. The output frequency is generally between 20kHz and 2.45GHz, and the output power is generally between 1-10kW.
The main technical indicators of hydrogen production power supply include:
Conversion efficiency: refers to the ratio of input power to output power, reflecting the degree of energy loss in hydrogen production power sources, generally reaching over 90%;
Power factor: refers to the ratio of input power to input apparent power, reflecting the degree of impact of hydrogen production power on the power grid, generally reaching 0.95 or above;
Power density: refers to the output power per unit volume or unit weight, reflecting the volume and weight of the hydrogen production power source. It should generally reach 10W/cm3 or 10W/kg or above;
Power response speed: refers to the time required for the output power to change from the minimum value to the maximum value, reflecting the adaptability of the hydrogen production power supply to load changes, generally less than 100ms;
Voltage ripple: refers to the AC component contained in the output DC voltage, reflecting the output stability and purity of the hydrogen production power supply, and should generally be less than 1%.
