Double-fed Motor Generation Experimental Study Based On The Double-variable Cycloconverter

Doubly-fed machine is an application and an advanced way suited to China's national conditions. Double-variable theory solution the defects of single - variable theory based on phase control converter and inverter control theory. The waveforms of double-variable cycloconverter output are good than ordinary cycloconverter.The combination of the doubly-fed machine and the double-variables cycloconverter is a new research direction. Papers based on analysis of the shortcomings of the principle of traditional single - variable control theory and leads to a two - variable control principle. Analysis of the AC-AC Converter without natural circulation mode of operation, optimizing the output voltage waveform; On the basis of analysis of doubly-fed principle, given the doubly-fed induction generator motor mathematical model and power transmission of electricity, design the experimental and study loading system for the experimental. The study includes shortcut properties and empty properties, the "v" shaped curve of the sub-synchronous state synchronization, Comparison of the doubly-fed electric generating state and the state inverter output voltage and current waveforms. Fourier transform filtering procedures and the preparation of double-fed power under the motor stator side wound, and the rotor side converter input harmonic analysis. Collecting and analysis a lot of data, the results show that the double-variable cycloconverter-fed generation operating system stability. Lay a good foundation to two variables cycloconverter used for wind power generation system VSCF.