Green hydrogen converter
| Hydrogen energy is recognized as a clean energy and is emerging as a low-carbon and zero carbon energy. Green hydrogen is hydrogen produced by electrolysis with water as raw material. Compared with grey hydrogen produced from coal and natural gas, green hydrogen is decarburized in the production process. | |
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The core of green hydrogen production lies in the application of efficient water electrolysis hydrogen production technology. Under the action of direct current, water will undergo electrochemical reaction and produce hydrogen and oxygen at the cathode and anode of the electrolytic cell respectively. As the core equipment in green hydrogen production, green hydrogen converter is a special kind of converter. The so-called special is mainly because the technical index requirements of the power supply are different from those of the common power supply. Its output voltage is required to be stable, the output current is particularly large, the requirements for stability, dynamic response and ripple are particularly high, and there are more special or even more stringent requirements than the ordinary power supply in the design and production of this kind of converter. |
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We can call a series of power supplies taking green hydrogen converter as an example as special power supply. The special power supply is characterized by high output voltage, high output current, high stability and good dynamic response. Its principle is to use power electronic technology and some special means to convert the primary electric energy output by the power plant or battery into a power supply designed to meet the requirements of occasions with special needs for the form of electric energy. |
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RXPE can provide the following series of special power supplies: ① Large rectifier (electroplating, electrolysis, solar energy and wind power energy storage electrode oxidation, DC electric arc furnace, DC submerged arc furnace, chemical cracking furnace, etc.); ② Electrolytic water hydrogen production power supply (wind power, solar energy, isolated island and other energy storage hydrogen production); ③ Plasma power supply (hydrogen plasma gun is used for ironmaking and steelmaking, polycrystalline silicon and special metal smelting); ④ Medium frequency power supply (vacuum furnace special metal smelting); ⑤ Energy storage power supply (solar cell inverter); ⑥ High voltage pulse power supply (dry dedusting, air purification and sewage treatment); |
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24 pulse thyristor rectifier topologies The topology uses the technical scheme of extended edge triangular phase shift and 24 pulse thyristor rectification, which can provide wide range and high-precision voltage and current output. High reliability. The response time is less than 200ms, and the output ripple is ≤ 5%.
Topology diagram of 24 pulse thyristor rectifier
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12 pulse thyristor rectifiers + IGCT chopper (3 + 1 redundancy) The topology fully combines thyristor high-power rectifier and fully controlled IGCT module with high reliability and high capacity, which greatly reduces the number of modules. 3 + 1 with redundant modules can meet the technical requirements. At the same time, multiple IGCT control strategy is adopted to greatly reduce the output voltage ripple. The front stage adopts thyristor-controlled rectification, which can reduce the switching frequency of IGCT and reduce the loss. High reliability. The response time is less than 200ms, and the output ripple is ≤ 5%.
12 pulse thyristor rectifier topologies
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