Multistable cascading induction generator set

A generator set and multi-stable technology, which is applied to asynchronous induction motors, electrical components, electromechanical devices, etc., can solve the problems of low efficiency of doubly-fed generators, and achieve the effect of high wind energy utilization rate and improved power generation efficiency.

Inactive Publication Date: 2014-10-01
WEIHAI DENGTONG PURIFICATION EQUIP
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0009] The purpose of this invention is to solve the technical problem of low efficiency of existing doubly-fed generators when generating power at low wind speeds, and to provide a multi-stable cascaded induction generator set with high power generation efficiency

Method used

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Embodiment Construction

[0019] like figure 1 As shown, the impeller 3 of the wind power generation system is mechanically connected to the input end of the gearbox 2 , and the output shaft of the gearbox 2 is connected to the rotor of the brushless double-fed generator 1 . The stator winding of brushless doubly-fed generator 1 includes two independent sets of windings with different numbers of poles. The first set is U1U2, V1V2, W1W2, and the number of poles is 2p; the second set is R1R2, S1S2, T1T2, and the number of poles is 2q. .

[0020] The three first ends of U1, V1, and W1 of the first set of stator windings are connected to the power grid 4 through the first switch device KM1, and the three tail ends of U2, V2, and W2 of the first set of stator windings are star-connected with the first set of stator windings. KM1 Y connect. At the same time, the first set of stator winding delta switch KM1 is passed between the three head ends of U1, V1, and W1 and the three tail ends of U2, V2, and W2. ...

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Abstract

The invention relates to a multistable cascading induction generator set. The multistable cascading induction generator set solves the technical problem that the conventional doubly-fed generators are relatively low in efficiency at low wind speed and comprises a brushless doubly-fed generator, a first switch device, a second switch device, a first set stator winding angle connecting switch, a first set stator winding star connecting switch, a second set stator winding angle connecting switch and a second set stator winding star connecting switch, wherein the stator winding of the brushless doubly-fed generator comprises a first set stator winding and a second set stator winding which are independent and different in the number of poles; the first set stator winding is connected with the angle connecting switch and the star connecting switch; the second set stator winding is connected with the angle connecting switch and the star connecting switch. According to the invention, the multistable cascading induction generator set can be used for wind power generation.

Description

technical field [0001] The invention relates to a generator, in particular to a multi-stable cascaded induction generator set. Background technique [0002] In the technical field of wind power generation, wind turbines include two operating modes, one is the constant speed and constant frequency operation mode, and the other is the variable speed and constant frequency operation mode. In the operation mode of constant speed and constant frequency, the rotation speed of the generator remains unchanged, thereby ensuring a constant frequency consistent with the frequency of the grid. This mode has low wind energy utilization, low efficiency, requires reactive power compensation devices, and uncontrollable output power. and other defects. Therefore, the variable speed and constant frequency operation mode is more and more widely used. Under the variable speed and constant frequency operation mode, the rotation speed of the generator set can change with the wind speed. The gene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K17/12H02K17/30
Inventor 胡云龙
Owner WEIHAI DENGTONG PURIFICATION EQUIP
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