研究目的
To develop a dynamic load model for medium voltage cascaded H-bridge multi-level inverter drive and induction motor systems suitable for power system dynamic studies.
研究成果
The developed dynamic load model accurately represents the dynamic responses of medium voltage cascaded H-bridge multi-level inverter drive systems under disturbances, considering both voltage and frequency dependence. It is suitable for insertion into large-scale power system simulation software for dynamic studies.
研究不足
The model is specifically designed for medium voltage cascaded H-bridge multi-level inverter drive systems and may not be directly applicable to other types of drive systems without modification.
1：Experimental Design and Method Selection:
The study employs an analytical method called the linearization approach to derive the dynamic load model. The model includes the aggregated effect of an MVD, an induction motor, and their control system.
2：Sample Selection and Data Sources:
A sample medium voltage cascaded H-bridge multi-level PWM inverter motor drive system is used for verification.
3：List of Experimental Equipment and Materials:
The study uses MATLAB/Simulink for building detailed switching models and for simulation studies.
4：Experimental Procedures and Operational Workflow:
The model is verified by comparing dynamic responses under disturbances (voltage sag and frequency variation) with a detailed switching model.
5：Data Analysis Methods:
The accuracy of the model is assessed through case studies and sensitivity analysis.
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