Power Control Device for Hydrogen Systems with Renewable Energy
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Solution Overview
Problem
Hydrogen production systems face challenges in matching the fluctuating power output from renewable energy sources with demand response requirements, as the control response of hydrogen production devices is slower than the fluctuation of renewable energy generation, leading to deviations in power sale targets.
Innovation Solution
A power control device that acquires and processes information on power sales and generation, using PID control and real-time target value adjustments to match the integrated value of power sales within predetermined periods, ensuring that the average power sale in one period is higher than in subsequent periods to compensate for potential decreases, thereby reducing deviations from planned values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the control response of hydrogen production device is adjusted to match renewable energy fluctuation, then the deviation between planned and actual power sales is reduced, but the control complexity increases due to the slower response characteristic
Solution Approach 1:
The controller performs preliminary actions by adjusting the hydrogen production device in advance based on predicted renewable energy generation. The system calculates predicted generated power and determines control commands before the actual fluctuation occurs, allowing the slower hydrogen production device to keep pace with renewable energy variations through proactive adjustment rather than reactive response
Solution Approach 2:
The controller dynamically adjusts the control command based on real-time comparison between actual and predicted generated power. The system continuously updates the control command to match the varying renewable energy output, making the hydrogen production device adaptable to fluctuating conditions despite its inherently slower response time
2Reliability
If the average value of power sale in first period is made larger than in second period, then the deviation from planned power sale is suppressed, but the control precision required increases
Solution Approach 1:
The controller implements preliminary action by setting a larger average power sale target for the first period based on predicted renewable energy generation. This proactive adjustment ensures that sufficient power is sold early when generation is expected to be high, preventing deviation from planned power sale targets without requiring complex real-time control adjustments
Solution Approach 2:
The controller dynamically adjusts the average power sale target across different periods based on predicted generation patterns. By making the target for the first period larger than for the second period, the system adapts to expected renewable energy fluctuations, maintaining reliability while managing control precision requirements through temporal distribution
Data Source
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AI summary
A power control device for a hydrogen system according to the present embodiment is a power control device configured to control a supply of generated power generated by a renewable energy generation device, and includes an acquirer and a controller. The acquirer acquires information related to an amount of power sale in a predetermined period. The controller controls the power supplier of the renewable energy generation device to sell power from the generated power, such that the integrated value of the power sale in time series in a predetermined period becomes the power sale amount. The controller makes an average value of the power sale in a first period within the predetermined period larger than the average value of a second period within the predetermined period after the first period.