Method and device for dividing fault ride-through intervals of wind turbine generator

A wind turbine and fault ride-through technology, applied in circuit devices, wind power generation, electrical components, etc., can solve the problems of poor generality of interval division and difficulty in verifying the control response characteristics of simulation models.

Pending Publication Date: 2019-10-22
CHINA ELECTRIC POWER RES INST +1
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  • Application Information

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Problems solved by technology

[0004] In order to overcome the disadvantages of the poor versatility of interval division in the prior art and the difficulty in verifying the control response characteristics of the simulation model, the present invention provides a method and device for dividing fault ride-through intervals of wind turbines, which brings the measured data at the output end of wind turbines into the pre-set The constructed artificial neural network model determines the control time of the wind turbine after the grid fault occurs, the control time of the wind turbine after the grid fault is cleared, the stable control time of the wind turbine after the grid fault occurs, and the stable control time of the wind turbine after the grid fault is cleared; based on wind power

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  • Method and device for dividing fault ride-through intervals of wind turbine generator
  • Method and device for dividing fault ride-through intervals of wind turbine generator
  • Method and device for dividing fault ride-through intervals of wind turbine generator

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Embodiment 1

[0077] Embodiment 1 of the present invention provides a method for dividing the fault ride-through interval of wind turbines, the specific flow chart is as follows figure 1 As shown, the specific process is as follows:

[0078] S101: Bring the measured data at the output end of the wind turbine into the pre-built artificial neural network model to determine the control time of the wind turbine after the grid fault occurs, the control time of the wind turbine after the grid fault is cleared, the stable control time of the wind turbine after the grid fault occurs, and The time when the wind turbine control is stable after the grid fault is cleared;

[0079] S102: Divide the wind turbine fault ride-through interval based on the control time of the wind turbine after the grid fault occurs, the control time of the wind turbine after the grid fault is cleared, the stable control time of the wind turbine after the grid fault occurs, and the stable control time of the wind turbine aft...

Embodiment 2

[0107] Based on the same inventive concept, Embodiment 2 of the present invention also provides a device for dividing fault ride-through intervals of wind turbines. The functions of the above modules are described in detail below:

[0108] The first determination module is used to bring the measured data at the output end of the wind turbine into the pre-built artificial neural network model, and determine the control time of the wind turbine after the grid fault occurs, the control time of the wind turbine after the grid fault is cleared, and the wind power control time after the grid fault occurs. The unit control stable time and the wind turbine control stable time after the grid fault is cleared;

[0109] The division module is used to control the wind turbine fault ride-through time based on the control time of the wind turbine after the grid fault occurs, the control time of the wind turbine after the grid fault is cleared, the stable control time of the wind turbine afte...

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Abstract

The invention provides a method and a device for dividing fault ride-through intervals of a wind turbine generator. The method comprises the following steps of: determining a wind turbine generator implementation control moment after a power grid fault occurs, a wind turbine generator implementation control moment after the power grid fault is removed, a wind turbine generator control stabilization moment after the power grid fault occurs and a wind turbine generator control stabilization moment after the power grid fault is removed; and dividing the fault ride-through intervals of the wind turbine generator based on the four moments. According to the invention, the fault ride-through intervals of the wind turbine generator can be automatically divided; the universality is high; and the control response characteristic of a simulation model can be verified. Based on fault ride-through actual measurement data of the wind turbine generator, the problems of large automatic interval division errors and poor universality caused by standard fixed time duration can be effectively solved, manual correction workload can be avoided, and the method and the device can be applied to high-voltageride-through tests and low-voltage ride-through tests at the same time.

Description

technical field [0001] The invention relates to the field of new energy technologies, in particular to a method and device for dividing fault ride-through intervals of wind turbines. Background technique [0002] The research on fault ride-through simulation of power system including wind power requires that the electrical simulation model of wind turbines can accurately simulate the fault ride-through response characteristics of actual wind turbines. Power system regulation decisions based on erroneous simulation results can lead to system disturbances, equipment damage, and even large-scale power grid accidents. Therefore, before implementing the wind power grid-connected simulation analysis, the accuracy of the fault ride-through response characteristics of the wind turbine electrical simulation model should be verified. [0003] Reasonable division of transient and steady-state intervals in the whole process of wind turbine fault ride-through is the basis of model verif...

Claims

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Application Information

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IPC IPC(8): H02J3/38
CPCH02J3/386H02J2203/20Y02E10/76
Inventor 陈子瑜李庆秦世耀张金平朱琼锋王顺来李建立樊熠苗风麟贺敬张梅唐建芳李春彦
Owner CHINA ELECTRIC POWER RES INST
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