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Internal double-feed wind-driven generator

A technology for wind turbines and fans, applied in wind power generation, electrical components, electromechanical devices, etc., can solve the problems of large rated current of generators, increased control difficulty, and high cost of electrical equipment, and achieves low operating costs, simple structure, Easy-to-control effects

Inactive Publication Date: 2011-05-04
SHANDONG ELECTRIC POWER RES INST +1
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the rated voltage of the doubly-fed generator still adopts the low-voltage 690V for motors below 2MW, which causes the rated current of the generator to be very large, that is, the so-called low-voltage high-current
Low voltage and high current lead to high cost of electrical equipment such as busbars, cables, circuit breaker switches, etc.
The fundamental way to solve this problem is to increase the voltage level of the double-fed wind turbine, but after the voltage level of the stator side of the double-fed wind turbine is increased, the cost of the inverter on the grid side will be greatly increased, and the difficulty of control will also be increased

Method used

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] figure 1 Among them, there are three sets of windings in the inner doubly-fed wind turbine, among which there are two sets of three-phase windings in the stator, one set is called stator winding 1, star connection, the other set is called regulating winding 2, delta connection, and these two The set of windings is embedded in the same slot. There is a set of three-phase windings in the rotor of the generator, called rotor winding 3, connected in a star connection. The stator winding 1 is designed as a high-voltage winding (3kV, 6kV, 10kV), and the stator winding 1 is directly connected to the grid side. The regulating winding 2 is designed as a low-voltage winding (690V), and the regulating winding 2 is connected to the grid-side inverter 5 of the fan converter. The rotor winding 3 is designed as a low-voltage winding (690V), and the rotor wi...

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Abstract

The invention relates to an internal double-feed wind-driven generator, which conveniently realizes high-voltage class. The internal double-feed wind-driven generator comprises a stator and a rotor, wherein the stator is provided with a star-connection stator winding and a delta-connection regulating winding; the stator winding is connected with an electric network side; the regulating winding is connected with a network side converter of a wind turbine current transformer; and a rotor winding is connected with a machine side converter of the wind turbine current transformer.

Description

Technical field: [0001] The invention relates to an internal double-fed wind power generator, which belongs to the technical field of wind power generation. Background technique: [0002] my country is rich in wind power resources. Although it started relatively late, after nearly two years of leap-forward development, it has the momentum to become a major wind power country. Nowadays, wind power generation has become a very promising industry in my country. In addition to multinational corporations eyeing my country's wind power industry, many domestic companies are also eager to make a difference in the wind power industry. [0003] There are two main types of wind power generation systems: constant speed and constant frequency wind power generation system and variable speed constant frequency wind power generation system. Constant-speed constant-frequency wind power generation systems generally use synchronous motors or squirrel-cage asynchronous motors as generators, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K3/28H02K3/12H02K11/00H02J3/38H02K11/33
CPCY02E10/72
Inventor 孙树敏孟瑜张海涛唐宗华
Owner SHANDONG ELECTRIC POWER RES INST
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