Active filter current self-adaptive control method based on fuzzy PI composite control

An adaptive control, composite controller technology, applied in active power filtering, harmonic reduction devices, AC networks to reduce harmonics/ripples, etc., can solve the problem of limiting the development of active power filters and unable to achieve global accuracy , fast and highly adaptive control objectives, etc.

Inactive Publication Date: 2013-05-01
HOHAI UNIV CHANGZHOU
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Problems solved by technology

[0004] New intelligent control methods have been greatly developed, but most of them are researches on DC side voltage tracking of active power filters or unilateral control of AC side current compensation, but such cont

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  • Active filter current self-adaptive control method based on fuzzy PI composite control
  • Active filter current self-adaptive control method based on fuzzy PI composite control
  • Active filter current self-adaptive control method based on fuzzy PI composite control

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Embodiment Construction

[0085] The present invention will be further described below in conjunction with the accompanying drawings.

[0086] The current adaptive control method of active filter based on fuzzy PI compound control provided by the present invention not only utilizes the advantage that fuzzy control does not depend on system parameters, but also utilizes that adaptive control can overcome the uncertainty of the controlled object and fast, Accurate tracking performance, online real-time compensation for modeling errors and external disturbances, so that the DC side capacitor voltage accurately tracks the set voltage, and the compensation current quickly and accurately tracks the command current signal to achieve the purpose of eliminating harmonics. Using fuzzy control theory and Lyapunov The DC-side voltage tracking controller and the AC-side current compensation controller designed by the method combine the advantages of fuzzy control and adaptive control, which can greatly improve the c...

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Abstract

The invention discloses an active filter current self-adaptive control method based on fuzzy PI composite control, and the method not only utilizes the advantage that fuzzy control does not depend on system parameters but also utilizes the capability of self-adaptive control of overcoming the uncertainty of a controlled object as well as the quick and precise tracking performance of the self-adaptive control to compensate for modeling errors and external disturbance on line in real time, so that compensation current quickly and accurately tracks a command current signal while capacitive voltage on a direct current side precisely tracks the set voltage, the purpose of eliminating harmonic wave is achieved, the compensation performance of an active power filter and the robust performance of the system can be greatly improved, the control goals of quickness and high adaptability are achieved, and the quick popularization of the active power filter is facilitated.

Description

technical field [0001] The invention relates to a current self-adaptive control method of an active power filter based on fuzzy PI composite control technology, and belongs to the technical field of active power filtering. Background technique [0002] With the increase of non-linear loads in the power system, the power quality of the power grid will decline and the harmonic content will increase. We know that harmonics have a certain impact on the safe operation of various power equipment and communication equipment. In severe cases, it will cause Equipment damage and power system accidents. 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 compensating current with the same amplitude and opposite phase as the harmonic current into the power grid. High adaptability, strong adaptability, fast response and other performance advantages. It is difficult t...

Claims

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Application Information

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IPC IPC(8): H02J3/01
CPCY02E40/40Y02E40/22Y02E40/20
Inventor 马凯琪费峻涛
Owner HOHAI UNIV CHANGZHOU
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