Hydrogen Electrolyzer Load Control for Grid Frequency Regulation
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Solution Overview
Problem
Renewable energy power generation causes frequency fluctuations in the power grid due to its randomness and fluctuation, which existing technologies have not effectively addressed.
Innovation Solution
A frequency regulation control method for a power system that adjusts the input current from a hydrogen generator unit based on system frequency deviations, using a relationship between system power consumption and frequency fluctuation to stabilize the grid frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If renewable energy power generation is used to reduce pollution, then environmental benefits are improved, but frequency stability of the power grid deteriorates due to randomness and fluctuation
Solution Approach 1:
The patent implements a frequency feedback control mechanism where the controller continuously monitors the power grid frequency and adjusts the input current to the electrolyzer based on the detected frequency deviation. When frequency deviates from the rated value, the system calculates the deviation and adjusts the electrolyzer current accordingly, creating a closed-loop feedback system that stabilizes frequency while maintaining renewable energy utilization.
Solution Approach 2:
The patent changes the operating parameter (input current) of the electrolyzer based on frequency deviation. By dynamically adjusting the input current to the electrolyzer according to the detected frequency deviation, the system modifies the power consumption characteristic to counteract frequency fluctuations caused by renewable energy variability, thus stabilizing the grid frequency.
2Reliability
If the input current from the hydrogen generator unit is adjusted to regulate frequency, then frequency stability is improved, but system complexity increases due to control mechanisms
Solution Approach 1:
The patent makes the electrolyzer serve dual functions: hydrogen production and frequency regulation. The same electrolyzer unit that produces hydrogen also acts as a flexible load for frequency stabilization. This multi-functionality approach allows the system to achieve frequency control without adding dedicated frequency regulation equipment, thereby limiting the increase in system complexity.
Solution Approach 2:
The system uses the electrolyzer's own operational flexibility to provide frequency regulation services. By leveraging the inherent ability of the electrolyzer to adjust its power consumption, the system achieves self-regulation of frequency without requiring complex external control infrastructure, thus maintaining relatively simple system architecture.
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 method effectively stabilizes power system frequency by adjusting input current from the hydrogen generator unit, addressing frequency fluctuations caused by renewable energy randomness and fluctuation.
Implementation Method 1
In technology for producing hydrogen by electrolyzing water, water is decomposed into hydrogen and oxygen under the action of direct current
Data Source
AI summary
A power system and a frequency modulation control method therefor. The method includes: first, determining whether the current power grid frequency of a power system falls within a preset allowable frequency deviation range; if not, performing calculation according to the current power grid frequency and a power grid rated frequency to obtain an input current change value of a hydrogen production power generation unit in the power system; on the basis of the size relationship between the input current change value and limit values thereof and the size relationship between the changed input current value and limit values thereof, determining a target input current of the hydrogen production power generation unit; and finally, adjusting an input current of the hydrogen production power generation unit according to the target input current, so as to allow the power grid frequency of the power system to fall within the preset allowable frequency deviation range. Therefore, by means of the relationship between system power consumption and frequency fluctuation, the present application can guide input current setting for the hydrogen production power generation unit on the basis of a measured system frequency to achieve frequency modulation control of the power system, thus solving the problem of frequency fluctuation of power grid systems caused by randomness and fluctuation of renewable energy power generation.