Wind power converter high voltage ride-through control method and device

A wind power converter and control method technology, applied in circuit devices, AC network voltage adjustment, wind power generation and other directions, can solve the problems of wind turbine off-grid, reduce the safety and stability of wind turbine operation, inapplicability, etc., to prevent disconnection. Network, improve work stability, improve the effect of practicality

Active Publication Date: 2018-06-05
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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Problems solved by technology

[0003] However, in the process of implementing this technical solution, it is found that the existing technology has the following defects: when the voltage continues to rise, the method of increasing the DC bus voltage will not be applicable, which will cause the wind turbines to fall out in a relati

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  • Wind power converter high voltage ride-through control method and device
  • Wind power converter high voltage ride-through control method and device
  • Wind power converter high voltage ride-through control method and device

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Embodiment Construction

[0026] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] figure 1 A schematic flowchart of a control method for high voltage ride-through of a wind power converter provided by an embodiment of the present invention; refer to the attached figure 1 It can be seen that this embodiment provides a control method for high-voltage ride-through of a wind power converter, which includes:

[0028] S1: Obtain the positive sequence voltage D-axis component / phase voltage effective value of the power grid side of the converter;

[0029] Among them, the effective value of the phase voltage can be obtained by first obtaining the AC three-phase grid voltage on the grid side of the converter, and then the effective value of the phase vol...

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Abstract

The invention provides a wind power converter high voltage ride-through control method and device. The control method comprises steps: a positive-sequence voltage D-axis component/phase voltage effective value of the power grid side of the converter is acquired; if the positive-sequence voltage D-axis component/phase voltage effective value is larger than a preset ride-through starting voltage value, the converter is determined to enter a high voltage ride-through mode; and according to a preset over modulation control strategy, a floating DC bus voltage control strategy and/or a reactive priority control strategy, the converter is controlled to ensure the converter to operate stably. According to the wind power converter high voltage ride-through control method and the control device provided in the invention, the wind power converter can operate stably in a high voltage operation range, the stability of the power grid is improved, large-scale wind power grid disconnection caused by voltage disturbance or failure is prevented, the working stability of each component in a wind turbine can be improved at the same time, and the practicability of the control method is improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of wind power generation, and in particular to a control method and device for high voltage ride-through of a wind power converter. Background technique [0002] For wind turbines, the voltage working condition of the power grid where the wind turbines are located directly affects the working status of the wind turbines. Entering the high-voltage working area, at this time, the grid-side inverter of the converter can be operated at a certain high voltage by increasing the DC bus voltage. [0003] However, in the process of implementing this technical solution, it is found that the existing technology has the following defects: when the voltage continues to rise, the method of increasing the DC bus voltage will not be applicable, which will cause the wind turbines to fall out in a relatively high voltage range. The risk of the power grid brings greater risks to the normal operation of t...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/12H02J3/16
CPCH02J3/12H02J3/16H02J3/386Y02E10/76Y02E40/30
Inventor 高瑞杨志千
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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