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FPGA-based maximum power tracking controller of wind power system

A technology of maximum power tracking and wind power system, which is applied in the control of wind turbines, wind power generation, wind turbines, etc., can solve problems such as difficulties in accurate measurement of wind speed, limited dynamic performance, high-frequency instability, etc., to avoid differential links and respond Fast, design-flexible effects

Inactive Publication Date: 2010-02-03
JIANGNAN UNIV
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Problems solved by technology

TSR control requires real-time and accurate measurement of wind speed, which is difficult to accurately measure in actual control due to the randomness and variability of wind speed
PSF control uses the characteristics of the fan and the power flow characteristics of the doubly-fed machine to realize the active power control of the stator, thereby realizing the adjustment of the generator speed; this method does not need to measure the wind speed, but the characteristics of the fan need to be obtained through a large number of experimental tests
HCS measures the fan speed and output power in real time, and uses mathematical optimization method to track the maximum output power. This method avoids the measurement of wind speed, but requires real-time measurement and calculation of the differential of output power and rotational speed. stable, limiting its dynamic performance

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  • FPGA-based maximum power tracking controller of wind power system
  • FPGA-based maximum power tracking controller of wind power system
  • FPGA-based maximum power tracking controller of wind power system

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with drawings and embodiments.

[0021] Such as figure 1 Shown: the present invention comprises sliding mode extremum search module and fuzzy parameter setting module, adjusts the parameter of sliding mode extremum search module according to the output of fuzzy parameter setting module; Described sliding mode extremum search module comprises comparison unit, switch unit and two integrators, and the fuzzy parameter tuning module includes a fuzzy controller.

[0022] The comparison unit takes the maximum power reference value P of the wind power system generated by the sliding mode extremum search module s * and the actual output power P of the wind power system s Subtract to get the power tracking error e. The switching unit is composed of a three-state switching function z 1 (e) and the hard-limit switch function z 2 (e) constitute, if figure 2 shown; the tri-state switch function z 1 The expr...

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Abstract

The invention relates to an FPGA-based maximum power tracking controller of a wind power system, comprising a sliding-mode extremum searching module and a fuzzy parameter setting module. Parameters ofthe sliding-mode extremum searching module are adjusted according to the output of the fuzzy parameter setting module; the sliding-mode extremum searching module comprises a comparison unit, a switching unit and two integrators; the fuzzy parameter setting module comprises a fuzzy controller; and power track errors and a wind speed are used as the input of the fuzzy controller. Small size, flexible design and high controller response speed of the controller are achieved because the maximum power tracking controller for searching a sliding-mode extremum of the wind power system is realized onan FPGA chip; parameters of a blower are unnecessary to know, and accurately measuring the wind speed and calculating the differential coefficient of the output power of the wind power system are notneeded, thereby high tracking precision and stability are achieved.

Description

technical field [0001] The invention relates to a controller, in particular to an FPGA-based maximum power tracking controller for a wind power system. Background technique [0002] Wind energy is a clean, widely distributed and fastest-growing renewable energy, and it is also a renewable energy with large-scale development and commercial development prospects. However, wind energy is also a random, explosive, and unstable energy source. In order to improve the utilization rate of wind energy, it is necessary to control the operation of the fan according to the change of wind speed to capture the maximum power. [0003] At present, the conventional maximum power tracking control methods for wind power systems mainly include Tip Speed ​​Ratio (TSR) control, Power Signal Feedback (PSF) control, Hill Climb Searching (HCS) and so on. TSR control requires real-time and accurate measurement of wind speed, which is difficult to measure accurately in actual control due to the rando...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/00
CPCY02E10/723Y02E10/72
Inventor 潘庭龙纪志成吴定会
Owner JIANGNAN UNIV
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