Stator permanent magnetic dual-rotor wind power generation system

Abstract

The invention discloses a stator permanent magnetic dual-rotor wind power generation system. The stator permanent magnetic dual-rotor wind power generation system comprises a direct-driven wind-power system; one end of the direct-driven wind-power system is connected with a wind machine, and the other end of the direct-driven wind-power system is connected with a diode uncontrolled rectifier and a DC-DC convertor; the other end of the DC-DC convertor is connected with an inverter; and the other end of the inverter is connected with a load. The stator permanent magnetic dual-rotor wind power generation system provided by the invention is an intellectualized, modularized and mechanized device; a Z-source inverter is adopted by the inverter, so by controlling a shoot-through duty ratio, a boost function similar to a two-stage power adjustment system is implemented very easily, and thus the input voltage grade as well as the power grade of the inverter can be reduced; as a stator permanent magnetic dual-rotor motor is adopted by the direct-driven wind-power system, the advantages such as the power density is high, the structure of a middle rotor is simple and the mechanical strength is high are achieved; and the stability of a DC-bus voltage of the wind-power system is maintained by the DC-DC converter by controlling a charging-discharging power of a super-capacitor, so the voltage stability of the wind-power system in large signal disturbance is implemented.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a stator permanent magnet double-rotor wind power generation system. Background technique [0002] Wind power is an effective way to utilize clean energy on a large scale. Due to its outstanding role in reducing environmental pollution, improving energy structure, and solving the problem of electricity consumption for residents in remote areas, it has attracted more and more attention from all over the world. In recent years, wind power technology has made great progress and development, and large-scale and large-capacity wind farms have been put into operation one after another around the world. However, since the output power of wind turbines is mainly affected by wind speed, air pressure, temperature and other aspects, it often fluctuates. When the wind power access capacity reaches a certain proportion, the random fluctuation of its output power will bring some negative ...

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Problems solved by technology

At the same time, the topology of the traditional Z-source inverter also has the following defects: (1) The capacitor voltage of the Z-source network is higher than the input DC voltage, resulting in high capacitor volume and cost; (2) The boosting capacity of the Z-source inverter is limited; (3) There is a start-up shock circuit in the converter, which is easy to damage the inverter

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