AC excitation magnetic control circuit for dual feedback wind force generator and its control method
A wind turbine, AC excitation technology, applied in the direction of controlling the generator through magnetic field changes, can solve the problems of difficult control performance to meet large-capacity wind turbines, poor anti-interference ability, complex hardware circuits, etc., to achieve good regulation performance and Sensitivity, improved power quality, simple effect of hardware circuit
Inactive Publication Date: 2008-05-28
TIANJIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
The currently researched doubly-fed wind turbine AC excitation control circuit has shortcomings such as low sensitivity, poor anti-interference ability, poor real-time performance, complex hardware circuits, and low reliability; and the traditional wind turbine control circuit lacks power The ability of the system to perform secondary frequency modulation; the control performance of traditional control circuits is difficult to meet the requirements of modern large-capacity wind turbines
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[0021] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0022] As shown in Figure 1, the present invention provides a doubly-fed wind generator AC excitation control circuit, the doubly-fed wind generator AC excitation control circuit 100 includes: a signal conditioning module 1, a central data processing module 2, a signal conversion Module 3, converter module 4, state monitoring and fault processing module 5; the two input terminals of the signal conditioning module 1 are respectively connected to the output terminals of the converter module 4 and the external sensor 6, and the voltage signal output terminal of the signal conditioning module 1 Connect the input end of the central data processing module 2 with the synchronous signal, the wind speed signal, the conversion signal output end; The pitch control circuit 7 of the wind power generator and the control panel 8 of the wind power generator; the two out...
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The invention discloses a double-feed wind generator AC excitation control circuit and the control method thereof. The control circuit includes a signal conditioning module, a central data processing module, a signal converting module, a convertor module, and a monitoring and troubleshooting module. The control method includes the steps of: (1) signal collecting stage; (2) the stage of amplifying and conditioning collected signals, and altering the collected signal into acceptable signals; (3) the stage of sending an adjustment instruction to the acceptable signals. The invention has the advantages that the circuit is simple, the outputted trigger pulse is safe and reliable, the control precision is high, and the stability and the reliability are improved. By the high-speed high-precision data processing capability of the chip, the invention overcomes the problems of control delay and precision defect of a common singlechip caused by the speed limitation, and ensures the whole control circuit to have better regulating performance and sensitivity. The invention can implement shifting constant-frequency control of a wind generator and the separate active and reactive power regulating control, can improve the output of the active power when stabilizing the voltage, and can improve the electricity quality of the power grid.
Description
technical field [0001] The invention relates to an AC excitation circuit and a control method of a doubly-fed wind power generator, in particular to an AC excitation control circuit and a control method of a doubly-fed wind power generator. Background technique [0002] The prior art doubly-fed wind power generating set includes: a fan, a generator and an AC excitation control device connected to the rotor winding of the generator. The AC excitation control device is provided with an AC excitation control circuit. The currently researched doubly-fed wind turbine AC excitation control circuit has shortcomings such as low sensitivity, poor anti-interference ability, poor real-time performance, complex hardware circuits, and low reliability; and the traditional wind turbine control circuit lacks power The ability of the system to perform secondary frequency modulation; the control performance of traditional control circuits is difficult to meet the requirements of modern large-...
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IPC IPC(8): H02P9/14
Inventor 马幼捷张继东周雪松王新志李显冰尹向前
Owner TIANJIN UNIVERSITY OF TECHNOLOGY