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Separate identification method for shafting model parameters of doubly-fed induction wind turbine

A technology of shafting model and identification method, which is applied in the field of independent identification of the parameters of the shafting model of a doubly-fed induction wind turbine, can solve the problems of too many parameters, difficult to identify accurately, and the time cannot be completely decoupled, so as to achieve good identification. The effect of precision

Active Publication Date: 2020-04-21
HOHAI UNIV
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Problems solved by technology

In particular, the electromechanical transient state and the mechanical dynamic process cannot be completely decoupled in time. The dynamic process involves parameters of the generator, controller and shaft system. Due to the large number of parameters, it is difficult to accurately identify

Method used

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  • Separate identification method for shafting model parameters of doubly-fed induction wind turbine
  • Separate identification method for shafting model parameters of doubly-fed induction wind turbine
  • Separate identification method for shafting model parameters of doubly-fed induction wind turbine

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0026] The process flow of the separate identification method for the shafting model parameters of the DFIG unit proposed by the present invention is as follows: figure 2 As shown, the following is an example of a simulation model of a DFIG unit with a rated capacity of 1.5MW. Under constant terminal voltage control mode. Since there is an independent identification method for wind turbine parameters, it is considered accurate and will not be repeated here.

[0027] T...

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Abstract

The invention discloses a separately identifying method for doubly-fed induction wind generating set shaft model parameters. According to the method, slow-speed disturbance signals with sinusoidal forms are overlaid on electric generator rotating speed signals, a slow dynamic process of a doubly-fed induction wind generating set is excited, decoupling identification of shaft parameters and electrical and controller parameters is achieved, shaft parameters can be separately identified under the condition that accuracy values of doubly-fed induction wind generating set parameters and the controller parameters are unacquainted, the shaft parameters are separately identified, identifying results have good accuracy, and the separately identifying method solves the problem that past doubly-fed induction wind generating set shaft model parameters are difficultly identified.

Description

technical field [0001] The invention relates to a separate identification method for shafting model parameters of a doubly-fed induction wind power generating set, and belongs to the field of power system modeling. Background technique [0002] Double-fed induction wind turbine (hereinafter referred to as "DFIG unit") is one of the mainstream models used in wind power generation at present. , speed-increasing gearbox and high-speed transmission shaft connected to the generator rotor), double-fed induction motor, power electronic converter and its controller and other parts. Establishing an accurate DFIG unit model is of great significance for studying the interaction between wind turbines and the grid after they are connected to the grid. [0003] The shafting model of the DFIG unit is mainly used to describe the flexibility and torsional vibration characteristics of the transmission system. The structure of the shafting system of the DFIG unit is as follows: figure 1 show...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 金宇清鲁重江吴大明鞠平吴峰潘学萍
Owner HOHAI UNIV
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