Single-Stage Power Converter for Compact Hydrogen Electrolysis
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Solution Overview
Problem
Conventional hydrogen production systems require a large physical footprint for integrating renewables with the power grid and electrolysers, limiting scalability and efficiency in green hydrogen production.
Innovation Solution
A compact single-stage power converter system with a multi-level converter architecture, including a 3-level converter with positive, neutral, and negative voltage terminals, connected to renewable power sources and electrolysers, and optionally a multi-port hybrid NPC converter for grid integration, reducing material requirements and enhancing flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional multi-stage power converters are used to integrate renewables with electrolysers, then the system achieves reliable power conversion, but the physical footprint and material requirements increase significantly
Solution Approach 1:
The patent combines multiple power conversion stages into a single integrated power converter unit. The converter integrates rectification, DC-DC conversion, and electrolyser control functions into one compact device, eliminating the need for separate multi-stage converters and reducing overall system footprint while maintaining conversion reliability
Solution Approach 2:
The power converter is designed as a multi-functional device that performs multiple operations: AC-DC rectification, DC voltage regulation, and direct coupling to electrolysers. This universal design consolidates what would traditionally require separate specialized components into one versatile unit, reducing material requirements and physical space
2Power
If conventional power conversion systems are used, then sufficient power conversion capability is achieved, but the system complexity and material usage increase
Solution Approach 1:
Multiple power conversion functions are merged into a single converter architecture, reducing the number of discrete components and interconnections. This integration maintains full power conversion capability while simplifying the overall system structure and reducing material requirements
3Adaptability or versatility
If conventional integration methods are used, then grid connection is achieved, but the scalability of hydrogen production is limited
Solution Approach 1:
The power converter is designed with universal interfaces that can connect to both grid and renewable power sources, as well as multiple electrolyser units. This multi-functional design enables flexible system configuration and easy scaling by adding modular components without requiring complex reconfiguration
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables a more compact and efficient integration of renewable energy sources with electrolysers, reducing the physical footprint and improving the scalability of hydrogen production systems, while maintaining high efficiency and robustness.
Implementation Method 1
a single stage power converter having an input side and an output side, wherein the input side is connected to the first renewable power source and the output side is connected to the first electrolyser
Implementation Method 2
green hydrogen produced by electrolysis with energy from renewable sources
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
A hydrogen production system (1) comprising: a first renewable power source (3-1), a first electrolyser (7-1), and a single stage power converter (5) having an input side (5a) and an output side (5b), wherein the input side (5a) is connected to the first renewable power source (3-1) and the output side (5b) is connected to the first electrolyser (7-1).