Hydrogen Power Control with Capacitor Buffer During Demand Response
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Solution Overview
Problem
The challenge is to maintain hydrogen production at a target level in a hydrogen energy system even when power supplied from the power grid is reduced during demand response periods, as existing systems struggle to ensure consistent hydrogen output due to fluctuating renewable energy sources and reduced grid power.
Innovation Solution
A hydrogen-system control device that sets a baseline for power consumption and adjusts actual power usage to ensure the system can produce a target amount of hydrogen, using a controller to manage power from both renewable-energy generators and the power grid, allowing for efficient hydrogen production even during reduced grid power conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If power consumption is reduced during demand response periods, then power grid stability is improved, but hydrogen production amount decreases below target
Solution Approach 1:
The system performs preliminary actions by storing electricity in the capacitor bank before demand response periods begin. The controller predicts upcoming demand response periods and pre-charges the capacitor bank during normal operation, so that when power reduction is needed, the stored electricity can be immediately deployed to maintain hydrogen production without affecting the overall production target.
Solution Approach 2:
The capacitor bank serves as an intermediary energy storage device between the electrolyzer and the power grid. It mediates the power supply by absorbing excess electricity during normal periods and releasing stored electricity during demand response periods, thereby decoupling the electrolyzer operation from grid power fluctuations and ensuring continuous hydrogen production at target levels.
2Productivity
If power from renewable-energy power generator is increased, then hydrogen production is improved, but system adaptability to grid conditions deteriorates
Solution Approach 1:
The system implements dynamic power management by continuously adjusting the power distribution between renewable-energy power generator and grid based on real-time conditions. The controller monitors grid status, demand response periods, and capacitor bank charge levels to dynamically optimize the power mix, maximizing hydrogen production when conditions permit while maintaining adaptability to grid constraints when demand response is active.
Solution Approach 2:
The system changes operational parameters by adjusting the power input to the electrolyzer based on available electricity from renewable sources and grid conditions. The controller modifies the electrolyzer's power consumption parameter dynamically, increasing it when renewable power is abundant and grid conditions are favorable, and reducing it when demand response periods occur, thereby balancing productivity with adaptability.
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 solution enables the hydrogen energy system to consistently produce a target amount of hydrogen by optimizing power usage and management, ensuring stability and reliability even during demand response periods with reduced grid power.
Implementation Method 1
A capacitor is charged with electricity before the request period, and the capacitor is used as a power source during the request period
Data Source
AI summary
A hydrogen-system control device according to the present embodiment is a control system for a hydrogen system that produces hydrogen: a first setter; a second setter configured to set an actual power consumption amount obtained by reducing a reduced power amount from the first power consumption amount in advance, when the demand response for reducing the first power consumption amount in the request period is requested the device comprising: and a controller configured to control a power amount of the second power in the request period based on the actual power consumption amount. The second setter is configured to set the actual power consumption amount in a range in which the hydrogen system is able to achieve a target amount of hydrogen to be produced in a first period that includes the request period and is longer than the request period.