AC Electrolysis Rectifier Control for Grid Oscillation Stability
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Solution Overview
Problem
The instability of renewable energy sources in photovoltaic and wind power stations leads to fluctuations in power output, causing unbalanced power and oscillations in alternating current electrolysis systems, affecting the normal operation of electrolysis stations.
Innovation Solution
A method and device for controlling the electrolysis system by acquiring voltage amplitude and modifying the output parameter of the electrolysis rectification power supply based on this amplitude, using thresholds and PWM signal adjustments to stabilize the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electrolysis station rectifies voltage from the alternating current grid, then direct current power for electrolysis is obtained, but fluctuations in renewable energy power output cause unbalanced power and oscillations in the alternating current grid
Solution Approach 1:
The control device detects the voltage amplitude at the alternating current side of the electrolysis rectification power supply and uses this feedback information to adjust the output parameters of the rectification power supply. This closed-loop feedback mechanism enables the system to respond to voltage fluctuations and maintain power balance, preventing oscillations in the alternating current grid while ensuring stable electrolysis operation.
Solution Approach 2:
The control device dynamically adjusts the output parameters (such as output power, current, or voltage) of the electrolysis rectification power supply based on the detected voltage amplitude. By changing these operating parameters in response to grid conditions, the system maintains power balance and stability despite fluctuations in renewable energy input.
2Stability of the object's composition
If the output parameter of the electrolysis rectification power supply is adjusted to match voltage amplitude, then power balance is achieved, but system complexity increases due to control mechanisms
Solution Approach 1:
The electrolysis rectification power supply system performs self-adjustment by automatically detecting its own operating conditions (voltage amplitude) and autonomously modifying its output parameters accordingly. This self-service capability eliminates the need for complex external control systems, achieving power balance through the system's inherent control functions while minimizing added complexity.
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 and device ensure that the electrolysis power matches the power of the alternating current grid, stabilizing the electrolysis station and preventing oscillations.
Implementation Method 1
the electrolysis station rectifies a voltage of the alternating current grid into direct current power for electrolysis
Implementation Method 2
modifying an output parameter of the electrolysis rectification power supply based on the voltage amplitude
Data Source
AI summary
An alternating current electrolysis system, as well as a method and a device for controlling the alternating current electrolysis system are provided. The method includes: acquiring a voltage amplitude at an alternating current side of an electrolysis rectification power supply; and modifying an output parameter of the electrolysis rectification power supply based on the voltage amplitude. Compared with the conventional technology, the problem of oscillation of a power grid due to unbalanced power of the alternating current electrolysis system is effectively solved, thereby facilitating normal operation of a electrolysis station.