High-Voltage DC Network for Wind-Powered Electrolysis Transfer
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Solution Overview
Problem
Existing systems face challenges in connecting and efficiently transferring power from renewable energy sources to electrolysis systems, particularly in microgrid operations, leading to high material and conversion losses due to the need for multiple transformers and AC-DC conversions.
Innovation Solution
A system combination utilizing a central DC network with high voltage and frequency-independent operation, allowing direct current to be fed from power generators like wind turbines or photovoltaic systems directly to electrolysis systems, reducing the need for transformers and AC conversions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple transformers and AC-DC conversions are used to connect power generators to electrolysis systems, then the system can operate with public grid frequency, but material costs and conversion losses increase
Solution Approach 1:
The patent extracts and eliminates the unnecessary AC-DC conversion stage from the power transmission chain. By directly connecting the DC output of rectifiers to electrolysis systems through a DC network, the system removes multiple transformers and conversion stages that cause energy losses, while still maintaining the ability to operate with public grid frequency when needed.
Solution Approach 2:
The patent introduces a DC network as an intermediary between power generators and electrolysis systems. This DC network serves as a mediator that can accept DC power directly from rectifiers and distribute it to multiple electrolysis systems, eliminating the need for repeated AC-DC conversions and reducing overall energy losses.
2Power
If multiple transformers are used for power transfer, then voltage can be stepped up and down, but material costs increase
Solution Approach 1:
The patent changes the fundamental parameter of the power transmission medium from AC to DC. This allows for more flexible and cost-effective voltage transformation using DC-DC converters only when necessary, rather than requiring multiple transformers throughout the system. The DC network enables direct voltage matching between generators and electrolysis systems, reducing material costs.
3Adaptability or versatility
If AC-DC conversions are performed multiple times, then the system can interface with different power sources, but conversion losses increase
Solution Approach 1:
The DC network serves as a universal interface that can directly accept DC power from various sources including rectifiers connected to the public grid, standalone renewable energy systems, or other DC generators. This multi-functional DC backbone eliminates the need for repeated AC-DC conversions while maintaining adaptability to different power sources.
4Length of moving object
If power is transmitted over larger distances, then remote and offshore applications become feasible, but transmission losses and material costs increase
Solution Approach 1:
The patent replaces the conventional AC power transmission mechanism with a DC transmission system. DC transmission is inherently more efficient for long distances as it avoids the reactive power losses and frequency-related issues that plague AC transmission. This substitution enables feasible power transmission over larger distances to remote and offshore applications with reduced losses.
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
This approach minimizes material costs, reduces conversion losses, and enhances operational flexibility, enabling secure and cost-effective power transfer over larger distances without the constraints of public grid frequency, suitable for remote and offshore applications.
Implementation Method 1
a rectifier having a DC voltage output is connected, the DC voltage output being designed for the high voltage
Implementation Method 2
The electrolysis system is a device which causes substance conversion using electrical power (electrolysis). The electrolysis systems produce hydrogen and oxygen from the supplied water by means of electrical energy
Data Source
AI summary
A system combination having at least two electrolysis systems, a power supply source having a direct voltage output, and a central supply line is provided. The central supply line is connected to the direct voltage output of the power supply source, so that a direct current can be fed into the central supply line and a central DC network designed for high voltage is provided, to which DC network the electrolysis systems are connected by means of the central supply line. The power supply source has, as a power generator, a wind turbine, to which a rectifier having a direct voltage output is connected, the direct voltage output being designed for the high voltage.