A fixed-pitch pmsg voltage stabilization method based on body-weakening magnetic design

A fixed-pitch, main body technology, applied in the field of constant-pitch permanent magnet synchronous wind turbine voltage stabilization, can solve the problems of narrow effective wind speed range for power generation, high and low voltage of fixed-pitch PMSG, and broaden the utilization of effective wind speed The effect of increasing the interval, increasing the power generation efficiency, and reducing the risk of overvoltage

Active Publication Date: 2017-07-04
CHINA AGRI UNIV
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Problems solved by technology

[0009] The technical problem to be solved by the present invention is that the voltage of the existing fixed-pitch PMSG is too high at high wind speeds, the voltage is too low at low wind speeds, and the effective power generation wind speed range is narrow

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  • A fixed-pitch pmsg voltage stabilization method based on body-weakening magnetic design
  • A fixed-pitch pmsg voltage stabilization method based on body-weakening magnetic design
  • A fixed-pitch pmsg voltage stabilization method based on body-weakening magnetic design

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Embodiment Construction

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] Such as figure 2 As shown, this embodiment discloses a PMSG voltage stabilization method with fixed pitch based on body-weakening design, and the method includes:

[0027] S1. Perform a magnetic field weakening design on the body of the fixed-pitch PMSG to reduce the voltage of the fixed-pitch PMSG at high wind speeds; the high wind speed is a wind speed within...

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Abstract

The invention discloses a fixed-pitch permanent magnet synchronous wind driven generator (PMSG) voltage stabilizing method based on a body flux-weakening design. The method includes: a flux-weakening design of a body of a fixed-pitch PMSG is performed, so that voltage of the fixed-pitch PMSG at a high wind speed is reduced; the high wind speed is a wind speed in a preset high wind speed range; an output end of the fixed-pitch PMSG is connected with a capacitor in parallel, so that voltage of the fixed-pitch PMSG at a low wind speed is improved; and the low wind speed is a wind speed in a preset low wind speed range. The method provided by the invention solves the problems that voltage of an existing fixed-pitch PMSG is too high at a high wind speed and a valid power generation wind speed interval is relatively narrow.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a constant-pitch permanent magnet synchronous wind-driven generator (PMSG) voltage stabilization method based on body-weakening design. Background technique [0002] In the independently operated small and medium-sized fixed-pitch permanent magnet synchronous wind turbine (hereinafter referred to as fixed-pitch PMSG), the excitation is provided by the permanent magnet. Since the excitation cannot be adjusted and controlled, the output voltage of the generator changes in the same trend with the wind speed. , that is, the electric energy generated by the generator can only be utilized within a certain voltage amplitude range, which limits the available wind speed range for the generator to effectively generate electricity. Especially in the high wind speed section, the conventional fixed-pitch PMSG cannot achieve wind energy utilization in a wider wind speed range by changing t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P9/14H02K21/00H02P101/15H02P103/20
Inventor 翟庆志罗李吴洋
Owner CHINA AGRI UNIV
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