Multi-Layer Power Electronic Control Using External Model Feedback
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Solution Overview
Problem
Power electronic products face limitations in optimizing their functions and performance due to software and hardware constraints of their controllers, which lack the ability to provide optimal control parameters without increasing costs.
Innovation Solution
A multi-layer control system comprising a first-layer controller, a second-layer controller, and optionally a third-layer controller, where the first-layer controller acquires state signals and outputs control signals based on feedback from the second-layer controller, which generates control reference signals using models and historical data, and the third-layer controller optimizes model parameters to enhance control accuracy and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the controller of the power electronic product is upgraded to provide better control parameters, then the functions and performance of the power electronic product can be optimized, but the hardware cost increases
Solution Approach 1:
The control system is divided into two independent layers: the original controller (first-layer controller) remains unchanged and continues to provide basic control functions, while a new external controller (second-layer controller) is added to provide enhanced control capabilities. This segmentation allows the system to gain improved control performance without upgrading the original controller hardware, thus avoiding increased hardware costs while maintaining reliability.
Solution Approach 2:
The external controller (second-layer controller) is designed to work with multiple types of power electronic products through standardized communication interfaces. It can assist different controllers in providing optimal control parameters across various applications, making the solution universally applicable without requiring product-specific hardware modifications.
2Reliability
If additional controllers are added to assist the power electronic product controller, then optimal control parameters can be provided, but the system complexity increases
Solution Approach 1:
The control architecture implements a nested structure where the second-layer controller (external controller) encapsulates the model-based control logic and feeds back control reference signals to the first-layer controller. The first-layer controller then generates actual control signals based on these reference signals. This nested arrangement organizes the multi-controller system in a hierarchical manner, making the system architecture more manageable and less complex than a flat multi-controller configuration.
Solution Approach 2:
The system implements a feedback mechanism where the second-layer controller receives state signals from the power electronic product, processes them through a model to generate control reference signals, and feeds these references back to the first-layer controller. This closed-loop feedback structure enables optimal control parameter generation while maintaining systematic organization, reducing the perceived complexity through structured information flow.
3Device complexity
If the controller hardware is not replaced, then the cost is not increased, but the control parameters cannot be optimized
Solution Approach 1:
The external controller (second-layer controller) acts as an intermediary between the original controller and the power electronic product. It receives state information from the product, processes this information through its internal model to generate optimized control reference signals, and provides these references to the original controller. This intermediary approach enables control parameter optimization without requiring hardware replacement of the original controller, maintaining cost-effectiveness while improving control quality.
4Adaptability or versatility
If more functions are added to the power electronic product, then the performance is enhanced, but the controller's software and hardware limitations prevent optimization
Solution Approach 1:
The solution adds a new dimension to the control system by introducing a second control layer outside the original controller. Instead of trying to expand the functionality within the constrained hardware/software boundaries of the original controller, the system extends control capabilities to an external dimension. The second-layer controller handles complex model-based control tasks while the first-layer controller maintains its original functions, enabling enhanced performance without being limited by the original controller's capabilities.
Data Source
AI summary
A multi-layer control system and method for a power electronic product. The multi-layer control system includes a first-layer controller and a second-layer controller. The first-layer controller acquires a first state signal of a power electronic product obtained by means of sensor measurement, and sends the first state signal to the second-layer controller, and receives a control reference signal fed back by the second-layer controller, and generates a control signal for the power electronic product on the basis of the control reference signal, and the second-layer controller acquires, according to the first state signal and a model simulating the power electronic product, a second state signal of the power electronic product other than the first state signal, and according to the first state signal, the second state signal, and a control target of the power electronic product, generates a control reference signal and outputs the control reference signal to the first-layer controller.