Active Harmonic Filter Coupled to Water Electrolysis
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Solution Overview
Problem
Industrial electrical installations face challenges in effectively managing harmonic pollution and reactive power compensation, leading to voltage distortions, heating, and instability, especially with the increasing integration of non-linear loads and renewable energy sources.
Innovation Solution
The integration of active harmonic filters with a controlled electrolysis system for hydrogen and oxygen production, which adapts to the DC bus features of the filters, allowing for simultaneous harmonic filtering, reactive power compensation, and dynamic control of active power consumption, optimizing the load factor and equipment performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If active harmonic filters are used to cancel harmonic distortions, then voltage quality is improved, but the DC bus accumulates excess power that cannot be utilized
Solution Approach 1:
The patent converts the harmful excess power that would otherwise be wasted in the DC bus into useful hydrogen fuel through electrolysis. The electrolyzer acts as a power sink that transforms electrical energy into chemical energy stored in hydrogen, thereby solving both the voltage stabilization problem and the power utilization efficiency problem simultaneously.
Solution Approach 2:
The DC bus is given dual functionality: it serves both as a power distribution bus for the harmonic filter and as an electrolyzer power supply for hydrogen production. This multi-functionality allows the system to simultaneously achieve voltage stabilization and productive power consumption, eliminating the contradiction between reliability and energy utilization.
2Productivity
If the electrolyzer power consumption is increased to optimize load factor, then equipment performance is improved, but harmonic distortions and voltage instability worsen
Solution Approach 1:
The system implements closed-loop control where the microcontroller continuously monitors DC bus voltage and electrolyzer current, adjusting the pulse width modulation (PWM) signals to maintain voltage within acceptable ranges while optimizing hydrogen production. This feedback mechanism ensures that increased electrolyzer power consumption does not compromise voltage stability.
Solution Approach 2:
The electrolyzer operates with dynamic pulse-width modulation rather than continuous fixed power input. The system dynamically adjusts the electrolyzer power consumption based on real-time DC bus voltage conditions, allowing maximum hydrogen production when voltage is stable and reducing power input when voltage fluctuates, thus maintaining both productivity and reliability.
3Use of energy by moving object
If pulse width modulation is used to control electrolyzer power, then active power consumption is optimized, but system complexity increases
Solution Approach 1:
The patent replaces complex mechanical power control mechanisms with electronic pulse width modulation controlled by a microcontroller. The PWM technique uses simple on/off switching of power electronics components (MOSFETs or IGBTs) with duty cycle adjustment to achieve precise power control, eliminating the need for complex mechanical regulators or analog control circuits while optimizing active power consumption.
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 effectively cancels out harmonic distortions, stabilizes voltage, and optimizes reactive power compensation, enhancing the operational efficiency and hydrogen production while minimizing infrastructure costs and equipment degradation.
Implementation Method 1
producing hydrogen and oxygen by electrolysis of water
Data Source
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AI summary
The invention relates to an electrical installation comprising at least one harmonic polluter and/or a consumer consuming a large amount of reactive energy, to which is added at least one active harmonic filter at a suitable voltage level and configured so as to compensate the unwanted current distortion and/or allow compensation of reactive energy absorbed from the network. Using a 3rd regulation loop, the voltage and the capacitance of the DC bus of the harmonic filter is adapted in order to allow the connection of a set of electrolysis cells on its DC bus, thus harnessing the available load rate of the filter or filters on the basis of the operating points and of the variable absorption spectrum of the polluter, the configurations of the upstream network, the ageing coefficients and the normative dimensioning margins by producing hydrogen by electrolysis of water.