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Method for controlling active power filter through model reference self-adaption fuzzy control

A power filter, self-adaptive fuzzy technology, applied in active power filtering, AC network to reduce harmonics/ripples and other directions, can solve the problem that the actual system cannot exert optimal control performance and limit the rapid development of active power filtering technology And other issues

Inactive Publication Date: 2014-02-19
HOHAI UNIV CHANGZHOU
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Problems solved by technology

[0004] The new intelligent control method has been greatly developed, but most of the control methods need to approximate the mathematical model of the active filter when applied to the active filter system, but such a control scheme will include the influence of modeling errors , the controller designed in this way can not exert the optimal control performance for the actual system, thus limiting the rapid development of active power filter technology

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  • Method for controlling active power filter through model reference self-adaption fuzzy control
  • Method for controlling active power filter through model reference self-adaption fuzzy control
  • Method for controlling active power filter through model reference self-adaption fuzzy control

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Embodiment Construction

[0052] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0053] Such as figure 2 As shown, the model refers to the active power filter control method of adaptive fuzzy control, including the following steps,

[0054] The first step is to establish a dynamic model of the active power filter

[0055] 1-1) Decompose the working process of the single-phase shunt active power filter into two modes within one switching cycle, and set the switching frequency of the four switching tubes VT1-VT4 as f s , the conversion period is T S =1 / f S , inverter switch duty cycle D=T ON / T S , D ∈ [0 1], T ON is during a conversion period T S The turn-on time of the medium switch tube: Mode 1, 0S , VT2 and VT3 are on, and VT1 and VT4 are off; in mode 2, when DT S S , VT2 and VT3 are turned off, VT1 and VT4 are turned on, and the switching state is opposite to that of mode 1;

[0056] 1-2) The dynamic ...

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Abstract

The invention discloses a method for controlling an active power filter through model reference self-adaption fuzzy control. An alternating-current side current compensation controller designed according to the T-S fuzzy control theory and the Lyapunov method has all aspects of advantages of fuzzy control and self-adaption control, integrates the advantage of strong disturbance rejection performance of T-S fuzzy approximation and T-S fuzzy control on the premise that the overall system stability is guaranteed and utilizes the advantages that model reference and self-adaption control can overcome uncertainty of controlled objects and can achieve fast and accurate tracking, and therefore voltage is set through precise tracking of the voltage of a direct-current side capacitor, current is compensated for at the same time to quickly and accurately track a directive current signal, the compensation performance and system robustness of the active power filter can be greatly improved, harmonics can be eliminated, and the quick popularization of the active power filter is facilitated.

Description

technical field [0001] The invention relates to a control method of an active power filter based on model reference self-adaptive fuzzy control, and belongs to the technical field of active power filter. Background technique [0002] The high-frequency development and wide application of power electronic technology is an inevitable trend. It can bring more and more convenience to our production and life. On the contrary, the power quality problems caused by the nonlinear characteristics of power electronic devices will be more severe. , the characteristics of harmonics will be more complicated. As an effective device for compensating harmonics and reactive power, the active power filter can offset the harmonic current generated by the nonlinear load by injecting a compensation current with the same amplitude and opposite phase as the harmonic current into the power grid, which can effectively overcome the The traditional passive filter compensates essential problems such as...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01
CPCY02E40/20
Inventor 马凯琪费峻涛
Owner HOHAI UNIV CHANGZHOU
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