Asymmetry coordination direct power control method of double-fed asynchronous wind power generation system
A wind power generation system and power control technology, applied in the direction of motor generator control, electronic commutation motor control, control system, etc., can solve the problems of not considering the fundamental frequency oscillation of GSC28, the complex structure of the control system, and the inability to achieve control effects. Achieve the optimal control effect, enhance the control target, and improve the effect of uninterrupted operation ability
Inactive Publication Date: 2011-01-12
ZHEJIANG UNIV
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[0010] Documents III and IV propose to use GSC 28 to compensate the double-frequency oscillation component in the active power of DFIG 3 stator, but the control of GSC 28 also needs to use positive, Negative-sequence separation and dual proportional-integral regulator 19, and the fundamental frequency oscillation in the output active and reactive power of GSC 28 is not considered, which makes the control system complex in structure, slow in dynamic response, and unable to achieve the expected control effect
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[0047] The present invention will be further described below in conjunction with the accompanying drawings.
[0048] figure 2 It is the schematic diagram of the doubly-fed asynchronous wind turbine, including wind turbine, gearbox, doubly-fed asynchronous generator DFIG 3, rotor-side converter RSC 1, grid-side converter GSC 28, filter inductor 31, DC bus capacitor 29 and liter voltage transformer.
[0049] The doubly-fed asynchronous generator DFIG 3 is connected to the grid through a step-up transformer, the input end of the rotor-side converter RSC 1 is connected to the rotor winding of the doubly-fed asynchronous generator DFIG 3 , the input end of the grid-side converter GSC 28 is passed through a filter inductor 31 Connected to the step-up transformer, the DC bus capacitor 29 is connected between the output of the rotor-side converter RSC1 and the grid-side converter GSC 28 .
[0050] image 3 It is a schematic diagram of an asymmetric coordinated direct power control...
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The invention discloses an asymmetry coordination direct power control method of a double-fed asynchronous wind power generation system, which adjusts the stator electromagnetism and the reactive poweThe invention discloses an asymmetry coordination direct power control method of a double-fed asynchronous wind power generation system, which adjusts the stator electromagnetism and the reactive powemmetrical voltage of the electric fence, effectively improves the operation control property of the double-fed asynchronous wind power generation system under the condition of the voltage failure of tmmetrical voltage of the electric fence, effectively improves the operation control property of the double-fed asynchronous wind power generation system under the condition of the voltage failure of the electric fence, and ensures the electric energy quality of power supply and the operation stability and the operation safety of an electricity system.he electric fence, and ensures the electric energy quality of power supply and the operation stability and the operation safety of an electricity system.r as well as active power and reactive power of a grid side convertor of a double-fed asynchronous generator through a proportional resonance regulator consisting of a proportional regulator and two rr as well as active power and reactive power of a grid side convertor of a double-fed asynchronous generator through a proportional resonance regulator consisting of a proportional regulator and two resonance regulators so as to effectively control the operation sate of the double-fed asynchronous generator and the grid side convertor under the condition without positive sequence and negative sequesonance regulators so as to effectively control the operation sate of the double-fed asynchronous generator and the grid side convertor under the condition without positive sequence and negative sequence current quantity decomposition. The invention can realize the integral optimized control effect of the double-fed asynchronous wind power generation system under the condition of asynchronous faience current quantity decomposition. The invention can realize the integral optimized control effect of the double-fed asynchronous wind power generation system under the condition of asynchronous failures of an electric fence, eliminates total active and reactive power, electromagnetic torque, and DC bus voltage fluctuation of the doublefed asynchronous wind power generation system because of asylures of an electric fence, eliminates total active and reactive power, electromagnetic torque, and DC bus voltage fluctuation of the doublefed asynchronous wind power generation system because of asy
Description
technical field [0001] The invention relates to a control method of a wind power generator, in particular to an asymmetric coordination direct power control method of a double-fed asynchronous wind power generation system. Background technique [0002] At present, my country's wind power technology mostly stays in the operation control under ideal grid conditions. Since the actual grid often has various symmetrical and asymmetrical faults, it is necessary to carry out research on operation control under grid faults and propose corresponding control technologies. Modern large-scale wind power generation systems mainly include two types: doubly-fed asynchronous generator (DFIG) and permanent magnet synchronous generator, among which the DFIG system is the current mainstream model. In recent years, international research on DFIG unit control technology has mostly focused on low-voltage ride-through operation control under symmetrical faults in the power grid, but asymmetric fau...
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IPC IPC(8): H02P21/00H02P9/00
Inventor 周鹏贺益康章玮孙丹
Owner ZHEJIANG UNIV