研究目的
To present an optimization model of Y-connection hybrid switching system of vacuum switch and power electronic device, and study the switching strategy of the model to suppress transient problems in reactive power compensation.
研究成果
The improved three-phase hybrid reactive compensation system based on high-speed VCB effectively suppresses closing inrush current through the coordination of VCBs and diodes. The system structure is simplified, increasing reliability, and there is a large range of ideal target points for the high-speed VCB, making the phase controller easier to implement.
研究不足
The technical and application constraints include the need for precise phase control and the potential for high impact during closing operations in long stroke applications. Areas for optimization may include further reducing the inrush current and improving the system's tolerance to the dispersion of the operating mechanism.
1：Experimental Design and Method Selection:
The paper presents an optimization model of Y-connection hybrid switching system combining vacuum switch and power electronic device, based on the ABB model. It includes the design rationale and the theoretical models employed.
2：Sample Selection and Data Sources:
The study uses a 10kV-transmission line model for simulation and builds an experimental platform based on high-speed VCB for testing.
3：List of Experimental Equipment and Materials:
High-speed VCBs with repulsion drivers, capacitor groups connected by Y type, digital signal processor (DSP) for detection, filter, and phase control.
4：Experimental Procedures and Operational Workflow:
Describes the process of putting capacitor groups into operation and opening them, including the coordination of VCBs and diodes to suppress inrush current.
5：Data Analysis Methods:
The effectiveness of the hybrid reactive compensation system is proven through simulation and experimental data, showing reduction in closing inrush current.
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