5MW AC/DC Coupled Hybrid Power Supply for Hydrogen Production

Definition

A power supply unit that connects to a low-voltage DC grid, such as photovoltaic, and converts its DC electric energy to that required by electrolyzers for hydrogen production in a water electrolysis system for hydrogen production.

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Application scenarios: Distributed micro-grid scenarios where new energy and hydrogen production plants are nearby each other; PV+(storage) off-grid hydrogen production, PV+grid hybrid hydrogen production;

Bipolar DC/DC scheme with high-frequency isolation to satisfy the wide range output of electrolyzers;

Multiplex power supply structure, easy to expand in parallel, applicable for electrolyzers with different capacity;

For off-grid operation scenarios, where the power supply for hydrogen production can follow the new energy grid;

For grid connection scenarios, where the AC/DC bi-directional converter is available for PV MPPT control, and the surplus power can be connected to the Internet;

AC-DC coupled to satisfy the electrolyzer full load rate and all-weather operation requirements.

TECHNICAL PARAMETERS

Items	Isolated Model:H1000DI	Non-isolated Model:H1000D
AC input parameters
Input voltage	DC0-1500V [higher than the demand voltage of the electrolyzer]	DC0-1000V [higher than the demand voltage of the electrolyzer]
DC output parameters
Max.power output	5.3MW	7.5MW
DC output voltage	0~DC 1000V	0~DC 900V
DC output current	0~8000A	0~8400A
Output voltage ripple	≤1%-Vpp
Output current ripple	≤1%-Ipp
Accuracy of output current	≤0.2%max.output current in constant current state
Accuracy of output voltage	≤0.2%of max.output voltage in constant voltage state
Load response time	≤0.1s
System characteristics
Topology	Multiplex DC/DC connection in parallel
Max.efficiency	0.98	0.99
Cooling method	Water-cooled	Air-cooled
Dimension	680014002280	56007002280
Protection level	IP42	IP32
Noise	≤75dB(A)	≤80dB(A)
Essential capabilities	Grid-side isolation,voltage chopper,fast load discharge,etc.
Protection	Short circuit protection,over-voltage/under-voltage protection,output over-current protection,over-temperature protection,cooling system failure protection,communication fault protection
Communication interface	485、Ethernet(Modbus RTU&Modbus TCP)
Man-machine interface	Industrial model HMI
Method of wire inlet and outlet	Upper inlet and lower outlet,lower inlet and upper outlet [customizable]
Note 1:Scale-up projects are recommended with isolated DC//DC power supply for hydrogen production to ensure safe isolation of the grid side and the load side; Note 2:Cooling water shall be pure water,with water pressure at 0.2-0.4Mpa,inlet temperature at 5-32°℃,and flow rate shall be determined according to the model; Note 3:Air-cooled models shall be equipped with good ventilation and heat dissipation,and special air ducts are recommended for heat conduction.

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