Power supply systems for hydrogen electrolysers 1–6 MW (input 6–33 kV, output up to 1500 V DC)
Modular AC-to-DC converters power hydrogen electrolysers of alkaline, PEM, SOEC and AEM technologies. The 6–33 kV PSU unit delivers up to 4000 A, and the PCS rectifier is fed from a 300–900 V network. Overall efficiency is about 98 % without harmonic filters.
- Power
- modular 1.2–5.6 MW (PSU — 1–6 MW; PCS — 1–3 MW)
- PSU input (MV skid)
- 6–33 kV, 50/60 Hz; hermetically sealed oil transformer with 2/4 secondary windings
- PCS input (LV)
- 300–900 V
- Output
- 500–1500 V DC; current up to 4000 A (PSU) / 2000 A (PCS); system — up to 9000 A
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
Modular AC-to-DC converters are designed for large hydrogen production projects by electrolysis. They are used with all electrolyser technologies, alkaline, PEM, SOEC and AEM. The scenarios cover Power-to-Gas, energy storage in hydrogen, green chemistry (ammonia, synthetic methane), refuelling stations and power generation by fuel cells. Surplus renewable energy is converted into hydrogen by fast electrolysis and, if needed, fed into the gas distribution network.
The basis is an active front end (AFE) on water-cooled AD7000 IGBT power modules, a three-level scheme and a transformer. Overall efficiency is about 98 % without harmonic filters and compensating devices. The power factor is above 0.99, THDi below 2–3 % and DC ripple below 1–2 %, so the electrolyser stacks are less stressed and last longer. The DC voltage range suits all types of electrolysers.
The Power Supply Unit (PSU) is built as a turnkey medium-voltage skid. The input is 6–33 kV, 50/60 Hz, with a hermetically sealed oil transformer with 2 or 4 secondary windings, the output is 500–1500 V DC, the current is up to 4000 A per unit and the efficiency up to 98.1 %. The open 40 ft skid (12,192 × 2438 × 2896 mm, about 23 t) is intended for outdoor installation, with degree of protection IP54 and factory tests. It can be transported in standard dimensions by road and sea.
The PCS (power conversion system) unit is fed from a 300–900 V LV network. The output is 500–1500 V DC, the current up to 2000 A, the efficiency 98.6 %, and the cabinet measures 3150 × 1100 × 2300 mm and weighs about 3.2 t. Modular solutions cover ratings from 1.2 to 5.6 MW with a maximum system current of 9000 A and a voltage of up to 1500 V DC. Skids and 20/40 ft containers for outdoor installation are available, as well as cabinets for indoor and outdoor mounting, with air and water cooling.
Control is digital, with voltage limiting and current regulation, and communication via Modbus TCP. The equipment carries the CE mark and complies with IEC and IEEE standards. For the IP54 version the power is derated at temperatures above 40 °C and at altitudes above 1000 m. The quality figures are given for a network with Psc = 250 MVA and a load from 8 to 100 %. Maintenance requirements are minimal.
Technical specifications
| Power | modular 1.2–5.6 MW (PSU — 1–6 MW; PCS — 1–3 MW) |
|---|---|
| PSU input (MV skid) | 6–33 kV, 50/60 Hz; hermetically sealed oil transformer with 2/4 secondary windings |
| PCS input (LV) | 300–900 V |
| Output | 500–1500 V DC; current up to 4000 A (PSU) / 2000 A (PCS); system — up to 9000 A |
| Topology | AFE on water-cooled AD7000 modules (IGBT), 3-level |
| Efficiency | up to 98.1 % (PSU), 98.6 % (PCS); overall 98 % |
| Quality | cos φ > 0.99; THDi < 2–3 %; current ripple < 1–2 % |
| Design | open skid or 20/40 ft container, cabinets; IP54 |
| Weight / dimensions (PSU) | ≈ 23 t; 12,192 × 2438 × 2896 mm |
| Communication | Modbus TCP etc. |
Request a price and lead time
Power supply systems for hydrogen electrolysers 1–6 MW (input 6–33 kV, output up to 1500 V DC). We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Questions and answers
What are the input and output voltages of the PSU unit?
The input is 6–33 kV, 50/60 Hz through a hermetically sealed oil transformer with 2 or 4 secondary windings. The output is 500–1500 V DC with a current of up to 4000 A per unit.
What network quality and efficiency figures are stated?
Power factor above 0.99, THDi below 2–3 % and DC ripple below 1–2 %. Overall efficiency is about 98 %, up to 98.1 % for the PSU and 98.6 % for the PCS.
What power range and designs are available?
Modular solutions cover 1.2 to 5.6 MW, the data give 1–6 MW for the PSU and 1–3 MW for the PCS. The designs are skids and 20/40 ft containers or cabinets, IP54.
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