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Doubly-fed generator control method and device

A technology of a doubly-fed generator and a control method, which is applied in the direction of single-grid parallel feeding arrangement, etc., can solve the problem of generator off-grid and other problems, and achieve the effect of solving generator off-grid.

Inactive Publication Date: 2014-01-01
SINOVEL WIND GRP
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] The present invention provides a doubly-fed generator control method and device to at least solve the problem in the prior art that the generator is off-grid due to a phase angle jump when the grid voltage is restored

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  • Doubly-fed generator control method and device

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Embodiment Construction

[0034] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0035] An embodiment of the present invention provides a doubly-fed generator control device, and the doubly-fed generator control device provided by the embodiment of the present invention is introduced below.

[0036] figure 1 is a structural block diagram of a doubly-fed generator control device according to an embodiment of the present invention.

[0037] Such as figure 1 As shown, the doubly-fed generator control device includes a first acquisition unit 11 and a compensation unit 12 .

[0038] The first acquiring unit 11 is used to acquire the grid voltage phase angle variation, wherein the voltage phase angle variance is the difference between the voltage phase angle when the grid is n...

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Abstract

The invention discloses a doubly-fed generator control method and device. The doubly-fed generator control method includes the steps that voltage phase angle variable quantity of a power grid is obtained, wherein the voltage phase angle variable quantity is the difference value between the voltage phase angle when the power grid is normal and the voltage phase angle when the power grid fails; when the power grid returns to normal from the failure, the voltage phase angle variable quantity is compensated to the voltage phase angle of a doubly-fed generator. The voltage phase angle variable quantity between the power grid before faults and the power grid after the faults is calculated, and the variable quantity is compensated to the voltage phase angle of the doubly-fed generator when the power grid returns to normal from the faults, therefore, the situation that the phase angle of the doubly-fed generator jumps to break away from the grid when the voltage of the power grid recovers is avoided, and the effect that the doubly-fed generator operates continuously without getting off the grid in a certain period of time is achieved.

Description

technical field [0001] The present invention relates to the field of wind power generation, in particular to a doubly-fed generator control method and device. Background technique [0002] As the demand for clean energy continues to increase, wind power has been developed more extensively, and the proportion of wind power in the power structure of the power system has also increased significantly, and its impact on the power system has become more and more obvious. [0003] The wind turbines (doubly-fed generators) in the prior art use a large number of power electronic devices, resulting in very limited overload and overcurrent capabilities. When the power grid fails, the current of the stator and rotor of the generator will increase rapidly, and the DC busbar of the converter The voltage of the wind turbine will also rise rapidly, and the wind turbine will directly disconnect from the grid in order to protect the device. A large area of ​​wind turbines disconnected from t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
Inventor 刘京波苏丽营刘志荆海斌王延涛
Owner SINOVEL WIND GRP
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