Fuel Cell Inverter Control via Parameter Sharing
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Solution Overview
Problem
The existing fuel cell system's superior-subordinate relationship between the system controller and inverter leads to inefficient control, causing unreasonable shutdowns and prolonged restart times, as the inverter is turned off regardless of its state, and the converter controller operates within limited voltage and current ranges without considering the inverter's conditions.
Innovation Solution
The system controller and converter controller share multiple parameters, including on/off states, temperature, gas, and air, to actively control the inverter, allowing it to respond dynamically to the fuel cell system, enabling more precise and efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system controller forces the inverter to turn off when temperature decreases below reference temperature, then the fuel cell system is protected from damage, but the inverter is turned off even when its own conditions are acceptable, causing unreasonable control and prolonged restart time
Solution Approach 1:
The control authority is segmented between the system controller and converter controller. The converter controller inside the inverter is given independent control authority to manage the inverter's operation based on its own conditions, while the system controller manages overall system protection. This segmentation allows the inverter to maintain operation when its local conditions are acceptable, reducing unnecessary shutdowns and restart time.
Solution Approach 2:
The converter controller continuously monitors the inverter's own conditions (voltage, current, temperature) and uses this feedback to make independent control decisions. This feedback mechanism enables the inverter to distinguish between system-wide issues requiring shutdown and local conditions that permit continued operation, thereby reducing unreasonable shutdowns and prolonging operational time.
2Ease of operation
If the converter controller operates only within limited voltage and current ranges after receiving turn-on command, then the inverter operation is simplified, but the control precision and system efficiency are reduced
Solution Approach 1:
The converter controller dynamically adjusts the inverter's operating parameters (voltage, current) based on real-time conditions from both the fuel cell system and the inverter itself. This dynamic control allows the system to operate efficiently across a wider range of conditions rather than being constrained to fixed voltage and current ranges, thereby improving system efficiency while maintaining ease of operation through automated adaptation.
3Device complexity
If the system controller and inverter have superior-subordinate relationship, then the control structure is simple, but the inverter cannot actively respond to fuel cell system conditions, reducing system efficiency
Solution Approach 1:
The control structure is segmented into two independent but coordinated controllers: the system controller for overall system management and the converter controller for inverter-specific control. This segmentation maintains relative structural simplicity while enabling the converter controller to actively respond to fuel cell system conditions, thereby improving system efficiency without excessive complexity.
Solution Approach 2:
The converter controller acts as an intermediary between the fuel cell system and the inverter. It receives information from the fuel cell system, processes it along with local inverter conditions, and generates appropriate control commands. This intermediary role enables active response to system conditions while maintaining a relatively simple overall control architecture.
Data Source
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AI summary
The present invention relates to a fuel cell system in which configuration of a system controller and an inverter having a superior-subordinate relationship is changed to configuration in which a system controller and a converter controller inside an inverter share multiple parameters to allow the inverter to actively respond to the fuel cell system, and a method for controlling input of an inverter and a fuel cell, and the fuel cell system is characterized in that the system controller and the converter controller inside the inverter do not have a superior-subordinate relationship but share multiple parameters so that an operable state of the inverter or a converter may be actively controlled.