Electrolysis of water requires direct current (DC), while the power grid provides alternating current (AC). Between the power grid and the electrolyzer, a device is needed to convert AC to DC—this is the hydrogen production power source. In the context of large-scale hydrogen production from renewable energy sources, power supply faces many challenges, stemming from fluctuating weather conditions and the increasing hydrogen production in individual storage tanks. Hydrogen production power sources employ high-frequency IGBT fully controlled power devices and PWM control technology, offering significant advantages in power response speed, voltage ripple, and overall efficiency, making them more suitable for large-scale renewable energy hydrogen production scenarios. (IGBT is an insulated-gate bipolar transistor characterized by high withstand voltage, low on-state voltage, and fast switching speed.)

①、Advantages of Hydrogen Production Power Sources:

1. Easy Grid Connection

Using PWM control technology, the grid-side current harmonic content is less than 3%, and the power factor is greater than 0.99. When the system is connected to the grid, the lower harmonic content and higher power factor significantly reduce the impact on the grid.

2. Fewer Equipment, Smaller Footprint, and Lower Initial Investment Costs

Since the harmonic content of the current measured by the grid meets the grid's requirements, the system does not require additional harmonic cancellation equipment such as SVG/SVC and on-load tap changers. This significantly reduces the initial investment costs for equipment and land.

3. Fast Power Response for Green Hydrogen Production

The power regulation response speed is less than 100ms, allowing for immediate response to rapid fluctuations in photovoltaic and wind power. This is more suitable for renewable energy to generate electricity with variable power, avoiding the need to generate electricity from the grid during periods of rapid power decline and ensuring green electricity generation.

4. Low Voltage Ripple, Simple System, and High Overall Conversion Efficiency

The low output voltage ripple makes the electrolyzer and the entire system operate more smoothly. For example, energy consumption is lower when a car is driving on a flat road. Simultaneously, the absence of harmonic cancellation and reactive power compensation devices simplifies the entire hydrogen production system and improves overall efficiency.

②、Hydrogen Production Power Supply Technology

1. Product Applications

The hydrogen production power supply is suitable for hydrogen production, chlor-alkali industry, graphitization, silicon carbide production and applications. It can be used for DC heating, DC electric arc furnace melting, and similar load applications such as magnetic power supplies.

2. Product Features

The hydrogen production power supply complies with national standards and other relevant technical standards. This product uses thyristors, and the protection and triggering systems use integrated circuits. It has complete protection functions, stable performance, and high parameter indicators. The product has a compact structure, is easy to maintain, and simple to operate.

3. Product Operating Environment

Altitude should not exceed 1000 meters; ambient temperature should not be lower than -10℃ and not higher than +40℃; relative humidity should not exceed 90% (when the air temperature is 20±5℃); there should be no conductive explosive dust, no gases or vapors that corrode metals or damage insulation, no severe vibration or impact, and the vertical tilt angle should not exceed 5°.

4. Main Technical Specifications

Input Voltage: Three-phase 380VAC, 50HZ, voltage fluctuation range 10%; Output Voltage: According to national standards or user requirements; DC Current Output: When Ud < 60%Udh, the limiting current value will be relatively reduced.