Double-air-gap hybrid-excitation direct-drive switch-reluctance wind generator and wind generator set system

Abstract

The invention relates to a double-air-gap hybrid-excitation direct-drive switch-reluctance wind generator and a wind generator set system. The wind generator comprises a main shaft, a shell, a rotor, an outer stator and an inner stator. Each stator comprises an iron core, a winding and a permanent magnet; the rotor adopts a double-salient-pole structure and is positioned between the inner stator and the outer stator and linked with the main shaft; the outer stator and the rotor form a first work air gap; the rotor and the inner stator form a second work air gap; the outer stator and the inner stator are oppositely connected in series corresponding to synclastic windings; and a first work air gap magnetic circuit and a second work air gap magnetic circuit are connected in series. The wind generator set system comprises a hub, a power converter, a direct-current battery, an inverter and a load, a control system, an auxiliary power supply and the wind generator, wherein the main shaft of the wind generator is linked with the hub and connected with the power converter; and the direct-current battery is connected in parallel between the power converter and the inverter and the load. The volume and the weight of the generator can be greatly reduced, the cost is lowered, the transportation is facilitated and the efficiency of the generator set is improved.

Description

technical field [0001] The invention relates to the field of wind power, in particular to a large double-air-gap hybrid excitation direct-drive switched reluctance wind power generator and its unit system. Background technique [0002] With the continuous development of the wind power industry, wind power technology is also constantly upgraded and updated, mainly manifested in: increasing the capacity of a single unit, developing new technologies to improve the performance of wind turbines, improving the utilization rate of wind energy, reducing the cost of wind power, and paying more attention to the safety and security of wind turbines. System reliability control. Wind farm operation control and predictive scheduling technologies are also being continuously improved. At the same time, the use of offshore wind energy resources, the development of offshore wind farm construction technology, and the development of large-scale offshore wind turbine components have become the f...

AI Technical Summary

Problems solved by technology

Especially for low-speed motors, such as switched reluctance wind turbines, when the power is greater than megawatts or more than several megawatts, their volume will become quite large, which will bring great difficulties to transportation

At the same time, the stator armature winding current of the traditional switched reluctance motor bears the dual functions of excitation and electromagnetic torque generation at the same time. The winding and inverter capacity requirements are relatively large, and the system efficiency and effective utilization of materials are low.

[0007] This shows that above-mentioned existing switched reluctance wind-driven generator obviously still has inconvenience and defect in structure and use, and urgently needs to be further improved

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