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A method of permanent magnet direct drive wind power generation system participating in grid frequency regulation

A technology for wind power generation system and grid frequency, applied in AC network load balancing, single grid parallel feeding arrangement, reducing/preventing power oscillation, etc., can solve the uncertain mathematical model of the grid, limit applications, and it is difficult to accurately obtain frequency adjustment instructions Signal and other issues

Inactive Publication Date: 2016-09-07
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

Method used

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  • A method of permanent magnet direct drive wind power generation system participating in grid frequency regulation
  • A method of permanent magnet direct drive wind power generation system participating in grid frequency regulation
  • A method of permanent magnet direct drive wind power generation system participating in grid frequency regulation

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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 fuzzy control-based permanent magnet direct drive wind power generation system participating in grid frequency regulation method, through the coordinated control of the motor side converter, the grid side converter and the flywheel energy storage unit side converter, the permanent magnet direct drive The wind drive unit can change its output frequency modulation power according to the real-time frequency of the power grid. The main effects are as follows: 1. While providing auxiliary frequency modulation power to the grid, it can also realize maximum wind energy tracking control. 2. It can flexibly change its control parameters according to the frequency of the power grid under all working conditions, and dynamically adjust the equivalent inertia and damping of the system, so that the permanent magnet direct drive wind turbine can participate in the frequency regulation of the power grid to the greatest extent.

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...

Claims

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Application Information

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Patent Type & Authority Patents(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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