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Method for allowing permanent magnetic direct drive wind power generation system to participate in frequency adjustment of power grid on basis of fuzzy control

A technology of wind power generation system and permanent magnet direct drive, which is applied in the direction of AC network load balancing, single-network parallel feeding arrangement, reduction/prevention of power oscillation, etc. It can solve the uncertain mathematical model of the power grid, limit the application, and it is difficult to obtain the frequency accurately Adjustment command signal and other issues

Inactive Publication Date: 2014-12-03
CHONGQING UNIV
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Problems solved by technology

However, due to the uncertainty of wind speed, it is difficult for this method to accurately obtain the frequency adjustment command signal obtained through wind speed calculation, thus limiting its application in practical systems.
[0008] In the actual application of engineering, considering that there are many factors causing frequency fluctuations, and the mathematical model of the power grid is uncertain

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  • Method for allowing permanent magnetic direct drive wind power generation system to participate in frequency adjustment of power grid on basis of fuzzy control
  • Method for allowing permanent magnetic direct drive wind power generation system to participate in frequency adjustment of power grid on basis of fuzzy control
  • Method for allowing permanent magnetic direct drive wind power generation system to participate in frequency adjustment of power grid on basis of fuzzy control

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Embodiment Construction

[0058] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0059] see figure 1 and figure 2 , the method for the permanent magnet direct drive wind power generation system of the present invention to participate in grid frequency regulation, the objects involved mainly include: voltage Hall sensor 1, current Hall sensor 2, rotor position sensor 3, abc / dq coordinate transformation module 4, space Vector modulator 5, abc / αβ coordinate transformation module 6, αβ / dq coordinate transformation module 7, grid frequency detection module 8, permanent magnet synchronous motor / generator 9, energy storage unit control parameter setting module 10, permanent magnet synchronous motor / Generator q-axis current given module 11 , energy storage unit current inner loop control module 12 , energy storage unit side converter 13 .

[0060] The method for the permanent magnet direct drive wind power generation system o...

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Abstract

The invention discloses a method for allowing a permanent magnetic direct drive wind power generation system to participate in frequency adjustment of a power grid on the basis of fuzzy control. A permanent magnetic direct drive wind power unit can change frequency adjustment power output by the permanent magnetic direct drive wind power unit according to real-time frequency of the power grid through coordination control over a motor side convertor, a power grid side convertor and a flywheel energy storage unit side convertor. The method has the advantages that maximum wind power tracking control can be achieved while auxiliary frequency adjustment power is provided for the power grid; control parameters of the power grid can be flexibly changed under all working conditions according to power grid frequency conditions, equivalent inertia and damping of the system can be dynamically adjusted, and the permanent magnetic direct drive wind power unit can participate in frequency adjustment of the power grid to the maximum degree.

Description

technical field [0001] The invention relates to wind power generation technology, in particular to a fuzzy control-based method for a permanent magnet direct drive wind power generation system to participate in grid frequency regulation, and belongs to the field of power control technology. Background technique [0002] In the permanent magnet direct drive wind power generation system, the shaft of the wind turbine is directly connected to the multi-stage low-speed brushless permanent magnet synchronous generator, which saves the transmission gearbox, brushes and slip rings, so the mechanical failure rate is lower and the generator The running stability and reliability are greatly enhanced. At the same time, the permanent magnet synchronous power generation system based on dual PWM converters can realize variable-speed constant-frequency power generation operation and independent control of active and reactive power, with high power generation efficiency, relatively simple s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/30H02J3/24
CPCY02E60/16
Inventor 姚骏余梦婷周特赵磊谭义
Owner CHONGQING UNIV
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