Method for realizing low-wind speed startup of permanent magnet wind turbine generator

A technology of wind power generating set and low wind speed, which is applied in the direction of wind power motor combination, wind power engine, wind power generation, etc. It can solve the problems such as the effect is not too obvious, increasing the difficulty of motor design, process difficulty and manufacturing cost, so as to improve power generation efficiency and reduce required effect

Inactive Publication Date: 2011-01-19
北京清能华福风电技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

From the actual application situation, the effect of these methods is not too obvious, and it increases the difficulty of motor design, process difficulty and manufacturing cost in the manufacturing process

Method used

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  • Method for realizing low-wind speed startup of permanent magnet wind turbine generator
  • Method for realizing low-wind speed startup of permanent magnet wind turbine generator
  • Method for realizing low-wind speed startup of permanent magnet wind turbine generator

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] The design concept of the low-wind-speed start-up method of the permanent magnet wind power generating set of the present invention is to use the full power converter configured by the permanent magnet wind generating set, the power of which can flow in both directions, and can be used as a power generation system to transmit electric energy from the motor to the power grid , can also be used as an electric system, which transmits electric energy from the grid to the motor, so that the generator set is in an electric state when starting, and a drag torque is applied to the motor shaft, thereby overcoming the inherent starting resistance of the permanent magnet wind turbine Torque, so that it can start and run smoothly at low wind speed.

[0022] The principle analysis based on the design idea is as follows:

[0023] The mechanical equation of th...

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PUM

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Abstract

The invention provides a method for realizing the low-wind speed startup of a permanent magnet wind turbine generator. When the method is used, the generator, under a condition of low wind speed, renders a full-power current transformer in a driving working mode first to absorb electric energy from a power grid and convert the electric energy into the mechanical kinetic energy of the generator, so that the generator can be driven to rotate till a cut-in rotating speed; and when the generator rotates at the cut-in rotating speed, the full-power current transformer is switched to a generation operating mode, and the electric energy generated by the generator is transmitted to the power grid, and the generator is started. Thus, the generator can overcome the inherent generator resisting torque to meet a startup condition even if the wind speed is low. The startup method can reduce the requirements of the wind turbine generator on environmental wind speed during startup effectively and improve the power generation efficiency at a low wind speed.

Description

technical field [0001] The invention relates to a starting method of a permanent magnet wind power generator set, in particular to a full power converter, which can make the permanent magnet generator in the electric state when starting, effectively overcome the inherent starting resistance torque of the permanent magnet wind power generator , so that it can start and run smoothly at low wind speeds, thereby improving the utilization efficiency of wind energy for wind power generators. It belongs to the technical field of wind power generation. Background technique [0002] All over the world, conventional energy is mostly non-renewable energy. At the same time, the use and conversion of conventional energy into secondary energy will cause serious environmental pollution and emit a large amount of CO 2 Greenhouse gases that cause global warming. These factors have prompted countries to strive to develop new types of renewable energy to meet the growing energy demand, while...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38F03D9/00F03D9/25
CPCY02E10/72
Inventor 陈守川苑国锋郑艳文
Owner 北京清能华福风电技术有限公司
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