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Self-adaptive fuzzy control method for active power filter based on feedback linearization

A feedback linearization and self-adaptive fuzzy technology, applied in active power filtering, instrumentation, electrical digital data processing, etc., to achieve the effect of enhancing dynamic response

Inactive Publication Date: 2013-06-12
HOHAI UNIV CHANGZHOU
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Problems solved by technology

However, so far, although the existing patents have studied the control of active power filters from different aspects, there is no comprehensive application of various advanced control methods and the control and control of active power filters based on Lyapunov analysis methods. dynamic compensation

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  • Self-adaptive fuzzy control method for active power filter based on feedback linearization
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  • Self-adaptive fuzzy control method for active power filter based on feedback linearization

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Embodiment

[0189] In order to verify the feasibility of the present invention, a simulation experiment was carried out under Matlab. Simulation results verify the effect of adaptive fuzzy controller and adaptive fuzzy PI controller based on feedback linearization.

[0190] The simulation parameters are selected as follows:

[0191] The sliding mode surface function s(t) is s=qe, wherein the sliding mode coefficient q=100,

[0192] Fuzzify the five membership functions: membership function μ=exp[-(x+4-(i-1)*1.6) 2 ], i=1,...,6, such as Figure 6 shown

[0193] Adaptive parameters take r=10000, compensation control u s =2.5, the proportionality coefficient η=10 of sgn(s).

[0194] Vector θ in fuzzy system f take as, θ f = θ fa θ fb ...

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Abstract

The invention discloses a self-adaptive fuzzy control method for an active power filter based on feedback linearization, relates to the technical field of an active power filter, and respectively designs independent self-adaptive controllers aiming at a current loop and a voltage loop. As the current loop adopts the self-adaptive fuzzy controller for the active power filter based on the feedback linearization, the feedback linearization theory, fuzzy control, sliding mode control, self-adaptive control and Lyapunov stability theory are comprehensively utilized, and on the basis of ensuring the global stability, the purpose of harmonic compensation is realized. As the voltage loop adopts the self-adaptive fuzzy PI (process integration) control, according to the fuzzy rule, the control strategy can automatically adjust the PI parameter, strengthen the robustness of the system, improve the dynamic performance of the system, and ensure the tracing to the command voltage.

Description

Technical field: [0001] The invention belongs to the technical field of active power filtering, in particular to an adaptive fuzzy control method of an active power filter based on feedback linearization. Background technique: [0002] With the rapid development of economy and society and the wide application of power electronic technology, the application of various nonlinear loads is increasing rapidly, which brings convenience to people, but also brings serious power quality problems, such as power factor reduction, current Problems such as voltage waveform distortion and phase distortion must be dealt with effectively. At present, external filters are mainly used for treatment. Filters are divided into passive filters and active filters. Since passive filters can only compensate for specific harmonics and other defects, the treatment of power problems is now mainly Focus on active filters. Active filter is a power device that suppresses grid harmonics, compensates reac...

Claims

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Application Information

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IPC IPC(8): H02J3/01G06F17/50
CPCY02E40/20
Inventor 侯世玺费峻涛
Owner HOHAI UNIV CHANGZHOU
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