Brushless doubly-fed power generation system

Abstract

The invention discloses a brushless doubly-fed power generation system, and belongs to the field of motor power generation. The system comprises a brushless doubly-fed generator including a power winding and a control winding, an AC-DC-AC frequency converter, an uncontrolled rectification module and an inversion module, wherein the AC-DC-AC frequency converter is connected with the control winding and is used for establishing and maintaining an initial DC bus voltage and adjusting a frequency and a voltage of the control winding; the frequency of the power winding is kept constant under the condition of a variable rotating speed, and the power distribution relation between the control winding and the power winding is adjusted when the capacity of the power winding is insufficient; the uncontrolled rectification module is connected with the power winding and used for rectifying the three-phase alternating current generated by the power winding into a target direct current bus voltage; and the inversion module is connected with the uncontrolled rectification module and is used for inverting the target direct current bus voltage into three-phase alternating current meeting a power utilization quality standard so as to supply power to a connected load or be connected with a main power grid for grid-connected power supply. According to the invention, the DC bus voltage can be kept stable, the dynamic response capability of the system is improved, the complexity of the system is simplified, and the debugging time is shortened.

Description

technical field [0001] The invention belongs to the field of motor power generation, and more specifically relates to a brushless double-fed power generation system. Background technique [0002] With the development of human society and the improvement of material level, the problem of energy shortage has become increasingly prominent. Therefore, the development and utilization of clean renewable energy and the improvement of energy conversion equipment to increase energy utilization have become research hotspots in recent years. [0003] Due to its reliable structure and flexible excitation adjustment, brushless doubly-fed motors have broad application prospects in variable speed power generation fields such as wind power, hydraulic power, and ship shafts, and have attracted much attention in recent years. [0004] At present, the brushless doubly-fed power generation system usually connects the power winding directly to the load or the power grid, and the control winding...

AI Technical Summary

Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a brushless doubly-fed power generation system, the purpose of which is to realize the stable control of the DC bus voltage by using an AC-DC-AC converter, thereby solving the problem of current brushless doubly-fed power generation. The system has technical problems such as complex adjustment, slow dynamic response, and poor stability of DC bus voltage

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