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Frequency matching method and device based on fuzzy PID controllers

A technology of frequency matching and controller, applied in the direction of control of electromechanical transmission, control of electromechanical brake, control system, etc., can solve problems such as fuzzy control, poor ability to eliminate system static errors, strong oscillation, etc.

Inactive Publication Date: 2017-07-14
GUANGDONG UNIV OF TECH
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Problems solved by technology

But the fuzzy control has no integral link, the ability to eliminate the static error of the system is not good, the oscillation near the maximum power point is relatively strong, and the stability is poor, which is not conducive to the wave energy generation system to obtain the maximum output power

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  • Frequency matching method and device based on fuzzy PID controllers
  • Frequency matching method and device based on fuzzy PID controllers
  • Frequency matching method and device based on fuzzy PID controllers

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Embodiment Construction

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0039] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0040] In the traditional way, when fuzzy control is applied to the wave energy generation system to capture the maximum power, since the fuzzy control has no integral link, the static error of the sy...

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Abstract

Embodiments of the invention disclose a frequency matching method and device based on fuzzy PID controllers. A reference current signal of a wave power generating system is calculated; a corresponding current deviation signal and the current deviation ratio are calculated according to the reference current signal and an actual current signal generated by the wave power generation system, the current deviation signal and the current deviation ratio are input to the fuzzy PID controllers and are processed by the fuzzy PID controllers, and then corresponding rotating voltage signals are obtained; the rotating voltage signals go through coordinate transformation and processing of an SVPWM generator, and then a target voltage signal of a working converter on a driving machine side; and the target voltage signal is applied to a motor of the wave power generating system, a motion speed of a float in the wave power generating system can be changed then, and then frequency matching is achieved. The fuzzy PID controllers are applied to the wave power generating system, an oscillation of the wave power generating system near a maximum power point can be effectively reduced, and then stability of obtaining of maximum output power of the wave power generating system is improved.

Description

technical field [0001] The invention relates to the technical field of wave energy power generation, in particular to a method and device for frequency matching based on a fuzzy PID controller. Background technique [0002] With the increasing demand for energy and the strengthening of environmental protection around the world, the promotion and application of clean energy has become an inevitable trend. Renewable and clean energy such as wind energy and solar energy are affected by weather changes and have a large randomness disadvantage. Wave energy is favored due to its small change per unit hour, high energy density and good predictability. How to maximize the capture Wave energy has become the research focus of wave energy generation. [0003] The wave energy generation system has its own natural frequency. When the wave energy frequency matches the frequency of the wave energy generation system, the two resonate. At this time, the wave energy generation system can abs...

Claims

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Application Information

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IPC IPC(8): H02P21/00H02P21/14
CPCH02P21/001H02P21/14
Inventor 林巧梅杨俊华徐训蔡浩然
Owner GUANGDONG UNIV OF TECH
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