Hydrogen Production Controller with Preliminary Power Adjustment
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Solution Overview
Problem
Hydrogen production systems face challenges in adjusting input power quickly enough to meet demand during short demand adjustment periods, leading to hydrogen production amounts not matching target values, resulting in excess or deficient hydrogen production.
Innovation Solution
A controller that calculates and adjusts input power to hydrogen production systems in advance, using a combination of PI control and feedforward control to match target power values at the start of demand adjustment periods, and adjusts hydrogen production accordingly to prevent reverse power flow and ensure accurate hydrogen supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the demand adjustment time period is short, then the response time requirement is improved, but the hydrogen production amount cannot change as planned because the change rate is small
Solution Approach 1:
The controller calculates a control command value in advance during a preparation time period before the demand adjustment time period starts. This preliminary calculation ensures that the input power to the hydrogen production system is adjusted proactively, compensating for the system's slow response rate and ensuring accurate hydrogen production amounts during the demand adjustment period.
2Productivity
If the controller controls the input power to the hydrogen production system, then the energy supply to load is improved, but the hydrogen production amount does not match target value due to slow change rate
Solution Approach 1:
The controller performs preliminary calculation of control command values before the demand adjustment time period begins. This advance preparation ensures that both energy supply requirements and hydrogen production target values are met simultaneously, resolving the conflict between productivity and reliability.
Solution Approach 2:
The controller calculates control command values based on target values for both input power and hydrogen production amount. This dual-parameter feedback mechanism ensures that energy supply efficiency and hydrogen production reliability are optimized together, preventing mismatches between power input and hydrogen output.
3Adaptability or versatility
If the demand adjustment time period is short, then the demand response capability is improved, but overshoot and undershoot of hydrogen production occur
Solution Approach 1:
By calculating control command values in advance during the preparation time period, the controller proactively adjusts the hydrogen production system's input power. This preliminary action prevents overshoot and undershoot by ensuring smooth transitions that respect the system's inherent slow response characteristics while maintaining demand response capability.
Data Source
AI summary
A controller according to an embodiment controls a hydrogen system including at least a hydrogen production system in which received power is planned in advance and a hydrogen production amount changes in accordance with the received power. The controller includes: a processor that calculates, in a preparation time period before a demand adjustment time period in which a target value of the received power is set in advance, a control command value such that input power to be inputted as the received power to the hydrogen production system matches the target value at a start of the demand adjustment time period; and a command controller that outputs the control command value calculated by the processor to the hydrogen production system.