Directly-drive wind power generation system composed of high temperature superconductive excitation magnetic flux switchover motor

Abstract

The invention provides a directly-drive wind power generation system composed of a high temperature superconductive excitation magnetic flux switchover motor. The directly-drive wind power generation system comprises a wind turbine, a high temperature superconductive excitation magnetic flux switchover motor, an uncontrollable rectifier module, a battery pack module, a direct current converter module, an inverter module, a grid-connected transformer, an operation mode control module and a central control unit. The directly-drive wind power generation system is small in volume, light in weight, high in efficiency, multiple in operation mode and good in an adaptability; as the high temperature superconductive excitation magnetic flux switchover motor is adopted as a generator, the characteristics that a high temperature superconductive winding is adaptive to a direct current is brought into play, and the rotational connection necessary for a conventional rotor excitation type high temperature superconductive motor is avoided; the directly-drive wind power generation system is simple in structure; a generator stator adopts a modularization structure, thereby being convenient for transportation and on-site installation; as the directly-drive wind power generation system can run in a switch magnetic reluctance motor generation mode, the phenomenon of quench of the high temperature superconductive material is prevented effectively; and the reliability of the system is improved effectively.

Description

Technical field [0001] The invention belongs to the technical field of wind power generation, and is a direct drive wind power generation system composed of a high-temperature superconducting motor. Background technique [0002] As the whole society continues to pay attention to energy and environmental issues, the development and utilization of renewable energy is showing a trend of accelerated development. Wind energy, as one of the most mature renewable energy development and application technologies currently mastered by mankind, plays an important role in sustainable social and economic development by virtue of its large exploitable quantity, wide distribution area, safety and environmental protection and other advantages. Looking at the wind power generation systems currently in operation and under development at home and abroad, they can basically be classified into two categories. The first category is a high-speed wind power system with a mechanical speed increasing gea...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the existing large-scale permanent magnet direct drive wind power generator is bulky and heavy, which makes the transportation and installation of the unit difficult; moreover, it is difficult to adjust the air gap magnetic field of the permanent magnet direct drive generator, and its output voltage The large fluctuation with the wind speed increases the control difficulty of the full-power two-way PWM grid-connected converter and the cost of the high-power power electronic devices used; it is necessary to overcome the disadvantages of the existing permanent magnet direct drive wind power generation system, which can Direct drive wind power generation system with high power density, high efficiency, convenient control and stable operation

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