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Generator rotor current control method and system both based on equivalent compensate iron auto disturbance rejection control

A technology of generator rotor and equivalent compensation, applied in the direction of motor generator control, control system, vector control system, etc., can solve the problems of affecting the dynamic performance of the system, normal control delay, slow estimation convergence speed, etc.

Inactive Publication Date: 2012-03-21
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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Problems solved by technology

[0009] The methods proposed in the above literature can be roughly divided into two categories in terms of ideas. One is to apply the standard ADRC directly to the control system. The control principle is as follows: figure 1 As shown, the second type is to appropriately simplify the standard ADRC according to the characteristics of the application. In essence, the uncertainty of the system model and the external disturbance are taken as comprehensive disturbance items, and the extended state observer is used to observe and compensate to In the system, the purpose of anti-interference is achieved, but the premise of implementation is to ensure that the observation error of ESO is bounded, otherwise it will seriously affect the stability of the system
In addition, only using ESO to estimate the comprehensive disturbance without considering the known information of the system will easily lead to slow estimation convergence speed, bring delay to the normal control of the system, and affect the dynamic performance of the system

Method used

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  • Generator rotor current control method and system both based on equivalent compensate iron auto disturbance rejection control
  • Generator rotor current control method and system both based on equivalent compensate iron auto disturbance rejection control
  • Generator rotor current control method and system both based on equivalent compensate iron auto disturbance rejection control

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Embodiment

[0046] Take the 1.65MW doubly-fed wind power generation system as an example, adopt the method proposed by the present invention to control, as image 3 , Figure 4 As shown, the rotor current control method of doubly-fed wind turbine based on equivalent compensation active disturbance rejection control, the specific implementation process is as follows:

[0047] (1) Use the voltage and current sensors to collect the three-phase stator voltage signal u of the generator sabc and stator and rotor current signal i sabc i rabc . The voltage signal is detected by the software phase-locked loop PLL to obtain its phase θ e and angular frequency ω e .

[0048] (2) Use the photoelectric encoder Encoder to detect the position of DFIG to obtain its mechanical position angle θ m and the mechanical angular frequency ω m , and thus calculate the electrical position angle θ r and the electrical angular frequency ω r , then the coordinate transformation angle θ st = θ e -θ r , sl...

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Abstract

The invention discloses generator rotor current control method and system both based on the ECADRC (Equivalent Compensate Iron Auto Disturbance Rejection Control). A projection modification optimized state observer ensures that the system confines the observation error of the items with uncertain time variation, and; the state error feedback law with a linear interval is adopted; and through the equivalent compensation control, the known information of the system serves as the compensation condition, so as to reduce the evaluation range and accelerate the evaluation convergence. Adopting the above method, under the premise of stable system, the steady state and transient property of a wind power generation system under different operation conditions are effectively improved.

Description

technical field [0001] The present invention relates to a control method and a system device of a wind power generator, in particular to a method for controlling the rotor current of a wind power generator and a system device in the field of wind power generation, which is an ADRC based on equivalent compensation (Equivalent Compensation AutoDisturbance Rejection Control (ECADRC) generator rotor current control method and system device. Background technique [0002] According to the form adopted in the electromechanical energy conversion link, variable-speed wind turbines can be divided into two categories: doubly-fed units and full-power converter units. The capacity of the converter of the full-power converter unit is equal to or slightly higher than that of the unit capacity, while the converter capacity of the doubly-fed unit is only 30% to 50% of the unit capacity. Due to its significant cost advantage, doubly-fed units have become the mainstream models in the wind pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/13
Inventor 胡婵娟万宇宾郭知彼王立鹏张劲松刘志星蒋耀生曹国荣宋建秀佘岳罗梅红张玉仕
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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