A three-phase Vienna rectifier inductance parameter identification method
By introducing a disturbance voltage component and a full-order state observer into the three-phase VIENNA rectifier, the model mismatch problem caused by changes in inductance parameters was solved, improving current tracking performance and ensuring safe and stable system operation, while reducing equipment costs.
CN116260350BActive Publication Date: 2026-07-03JIANGSU UNIV OF SCI & TECH
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGSU UNIV OF SCI & TECH
- Filing Date
- 2023-03-03
- Publication Date
- 2026-07-03
AI Technical Summary
Technical Problem
Variations in inductor parameters in the three-phase VIENNA rectifier system lead to system model mismatch, affecting current tracking performance and system safety operation.
Method used
By introducing a disturbance voltage component in a two-phase rotating coordinate system, a full-order state observer is constructed to observe the changes in disturbance voltage in real time. This discretizes the inductor parameter identification method, thereby improving the accuracy of the mathematical model and the current tracking performance.
Benefits of technology
The accuracy of the mathematical model for the three-phase VIENNA rectifier system has been improved, ensuring safe and stable system operation and reducing additional equipment costs.
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Figure CN116260350B_ABST
Abstract
The application discloses a three-phase Vienna rectifier inductance parameter identification method, comprising the following steps: obtaining a first mathematical model of a Vienna rectifier in a two-phase rotating coordinate system; introducing a disturbance voltage component into the first mathematical model; discretizing the first mathematical model to obtain a discrete mathematical model; taking the disturbance voltage component as a state variable to construct a full-order state observer to realize real-time observation of the disturbance voltage; and discretizing a disturbance voltage state equation to realize online identification of inductance parameters. The three-phase Vienna rectifier inductance parameter identification method provided by the embodiment of the application can better simulate the actual working conditions of the change of inductance parameters when the three-phase Vienna rectifier system is running by introducing the disturbance voltage, and the accuracy of the mathematical model is improved. By constructing a discrete full-order state observer, the change of the disturbance voltage is observed in real time, the tracking performance of the current is improved, and the safe and stable operation of the three-phase Vienna rectifier system is ensured.
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