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Inverter control method, device and system of wind turbine generator set

A technology for wind power generators and inverter control, applied in wind power generation, circuit devices, electrical components, etc., can solve problems such as inaccurate measurement of grid voltage phase angles, and achieve the goals of ensuring stability, enhancing stability, and improving success rate Effect

Active Publication Date: 2018-09-25
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide an inverter control method, device, and system for a wind power generating set to solve the problem of inaccurate measurement of the phase angle of the grid voltage caused by the voltage drop of the grid to a lower area, thereby enhancing the inverter control of the wind generating set. The stability of low-voltage ride-through control of the inverter improves the success rate of low-voltage ride-through

Method used

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  • Inverter control method, device and system of wind turbine generator set
  • Inverter control method, device and system of wind turbine generator set
  • Inverter control method, device and system of wind turbine generator set

Examples

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Embodiment 1

[0029] figure 1 It is a flow chart of an inverter control method for a wind power generating set according to Embodiment 1 of the present invention.

[0030] Such as figure 1 As shown, the inverter control method of the wind power generating set in this embodiment includes:

[0031] S110. Periodically acquire grid-connected voltage data of the wind power generating set.

[0032] Wherein, the grid-connected voltage data includes a grid voltage value, a first grid voltage phase angle value, and a grid frequency value.

[0033]During the operation of the wind turbine generator set, the grid-connected voltage signal of the wind turbine generator set can be periodically detected by setting a voltage detection device (for example, a voltage sensor) at the grid-connected point, and the grid-connected voltage signal can be processed by the voltage processing device , to obtain grid-connected voltage data. For example, the above grid voltage value is calculated by the voltage calcu...

Embodiment 2

[0045] figure 2 It is a flow chart of the inverter control method of the wind power generating set in the second embodiment of the present invention, which can be regarded as an optional implementation of the inverter controlling method of the wind generating set in the first embodiment above.

[0046] In this embodiment, the inverter controller of the wind power generating set is used as an example to illustrate the control method, but those skilled in the art should understand that in practical applications, any other equipment with corresponding data collection and processing functions , can refer to this embodiment to implement the inverter control method of the wind power generating set of the present invention.

[0047] Such as figure 2 As shown, the inverter control method of the wind power generating set in this embodiment includes:

[0048] S210. Periodically acquire grid-connected voltage data of the wind power generating set.

[0049] Wherein, the grid-connecte...

Embodiment 3

[0077] image 3 It is a structural block diagram of the inverter control device of the wind power generating set according to the third embodiment of the present invention.

[0078] Such as image 3 As shown, the inverter control device of the wind power generating set includes an acquisition module 310 , a judgment module 320 , a calculation module 330 and a control module 340 . Wherein, the acquiring module 310 is used to periodically acquire the grid-connected voltage data of the wind power generating set, and the grid-connected voltage data includes the grid voltage value, the first grid voltage phase angle value and the grid frequency value; the judging module 320 is used to obtain the current Periodic grid-connected voltage data determine whether to enter the low-voltage ride-through fluctuation state; the calculation module 330 is used to set the obtained grid frequency value of the previous cycle as the grid frequency locking value if it is determined that the low-vol...

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Abstract

The embodiment of the invention provides an inverter control method, device and system of a wind turbine generator set. The control method comprises steps of periodically acquiring grid-connected voltage data of the wind turbine generator set, wherein the grid-connected voltage data comprises a power grid voltage value, a first power grid voltage phase angle value and a power grid frequency value; according to the acquired grid-connected data at the current period, determining whether to enter a low-voltage ride-through fluctuation state; if determining an inverter is entering the low-voltageride-through fluctuation state, setting the power grid frequency value of the previous period to be the power grid frequency locking value and according to the acquired first power grid voltage phaseangle value and the acquired power grid frequency locking value of the previous period, calculating a second power grid voltage phase angle value at the current period, according to the second powergrid voltage phase angle value and the power grid frequency locking value, generating an inversion control instruction, and sending the inversion control instruction to a net side inverter of the windturbine generator set. In this way, stability of low-voltage ride-through control can be improved.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to an inverter control method, device and system for a wind power generating set. Background technique [0002] During the operation of the wind power generating set, when the grid voltage drops below 0.9PU. Uninterrupted grid-connected operation during voltage failures. Among them, the inverter of the wind turbine performs the main low-voltage ride-through control. In the low-voltage ride-through control strategy of the inverter, the phase angle of the grid voltage is obtained through the three-phase phase-locked loop, and the phase angle output by the phase-locked loop is used for low-voltage ride-through control throughout the process. [0003] However, when the low voltage drops to a low level, due to the low grid voltage value and the distortion of the voltage waveform, the three-phase phase-locked loop has an error in locking the phase angle of the grid voltage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/12
CPCH02J3/12H02J3/386Y02E10/76
Inventor 高瑞
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD