Adaptive fuzzy backstepping tracking control method of active power filter

A power filter, adaptive fuzzy technology, used in adaptive control, active power filtering, general control systems, etc.

Inactive Publication Date: 2013-09-11
HOHAI UNIV CHANGZHOU
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, so far, although the existing patents have carried out research on the control of active power filters from different aspects, they have not applied inversion control, fuzzy control and Lyapunov theory to control and control active power filters. dynamic compensation

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  • Adaptive fuzzy backstepping tracking control method of active power filter
  • Adaptive fuzzy backstepping tracking control method of active power filter
  • Adaptive fuzzy backstepping tracking control method of active power filter

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Embodiment Construction

[0053] Below in conjunction with accompanying drawing, the present invention is further described:

[0054] Active power filter adaptive fuzzy inversion tracking control method, comprising the following steps

[0055] (1) Establishing the mathematical model of the active power filter

[0056] The invention mainly relates to a parallel voltage type active power filter, which is used to eliminate the harmonic pollution caused by the three-phase diode bridge rectifier load, and its main circuit structure is as follows figure 1 .

[0057] The basic working principle of the active power filter is to quickly obtain the relevant compensation components through real-time collection of the grid current, and through the control of the high-performance converter, the filter generates a current with the same magnitude as the harmonic and opposite direction. Eliminate harmonics present in the grid.

[0058] According to circuit theory and Kirchhoff's theorem, the following three differe...

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Abstract

The invention discloses an adaptive fuzzy backstepping tracking control method of an active power filter, relates to controllers of the active power filter and particularly provides an adaptive fuzzy backstepping tracking control method, combining adaptive control, fuzzy control and backstepping control and aiming at a three-phase active power filter. For shortcomings of a backstepping control law design, a fuzzy logic system is utilized to approach an unknown nonlinear function, and the fuzzy logic system is adjusted on line according to an adaptive law, so that harmful effects on the system due to parameter uncertainty are avoided. An adaptive fuzzy backstepping controller enables a compensating current to track an instruction current signal in real time, stabilizes the tracking deviation in neighborhoods of 0 and utilizes the Lyapunov method to analyze the stability and the convergence of the system so as to guarantee that all signals in a closed-loop system has global asymptotic stability.

Description

technical field [0001] The invention belongs to active power filter technology, in particular to an adaptive fuzzy inversion tracking control method for an active power filter. Background technique [0002] With the popularization and application of modern power electronic technology, there are more and more various power electronic devices. The working performance and service life of equipment and electrical equipment, and even the safety of critical power systems. Currently, external filters are mainly used for treatment. Filters are divided into two types: passive filters and active power filters. Due to the defects of passive filters that can only compensate for specific harmonics, the current treatment of power problems is mainly focused on active power filters. The active power filter can track and compensate the harmonics with changing frequency and amplitude. It can not only compensate each harmonic, but also suppress flicker and compensate reactive power. At the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04H02J3/01
CPCY02E40/20
Inventor 侯世玺费峻涛
Owner HOHAI UNIV CHANGZHOU
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