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Harmonic current tracking method based on intelligent control

A harmonic current and intelligent control technology, which is applied to harmonic reduction devices and AC networks to reduce harmonics/ripples, etc., can solve the problems of fixed parameters and difficulty in achieving tracking effects, and achieve good filtering effects

Inactive Publication Date: 2016-02-03
NANJING APAITEK TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

Currently existing tracking algorithms have fixed parameters and it is difficult to achieve the ideal tracking effect when the system working conditions change.

Method used

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  • Harmonic current tracking method based on intelligent control
  • Harmonic current tracking method based on intelligent control
  • Harmonic current tracking method based on intelligent control

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Embodiment Construction

[0018] The invention discloses a harmonic current tracking method based on intelligent control, which includes the following steps:

[0019] S1, first optimize the switching state of the power semiconductor device of the main circuit by genetic algorithm;

[0020] S2. Using the optimized switch state to train the neural network controller to obtain coefficients of the neural network controller.

[0021] In the present invention, offline optimization is selected.

[0022] The following are the specific steps of the genetic algorithm:

[0023] First of all, the optimization goal is determined. If the compensation current of the active power filter can approach the harmonic current without limit, then the active power filter can achieve the ideal compensation effect. Therefore, the objective function can be determined as Among them, i h (t), i c (t) respectively represent the harmonic command current of the kth sampling value and the compensation current of the active power...

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Abstract

The invention provides a harmonic current tracking method based on intelligent control. The method comprises steps: S1, a genetic algorithm is firstly used for optimizing a switching state of a power semiconductor device of a main circuit; and S2, the optimized switching state is used for training a neural network controller, coefficients of the neural network controller are obtained, and through formula computing, harmonic current tracking is thus realized. In a condition in which the working condition of a load is complicated, the harmonic current can be quickly tracked, and an active power filter can achieve good filtering effects.

Description

technical field [0001] The invention relates to the tracking of harmonic current in power electronic equipment, in particular to an intelligent control-based harmonic current tracking method. Background technique [0002] Tracking harmonic current is the key link of active power filter, and the speed and accuracy of tracking directly affect the filtering effect. Currently existing tracking algorithms have fixed parameters and it is difficult to achieve the ideal tracking effect under the condition of changing system working conditions. [0003] Therefore, a fast and accurate method for tracking the change of the harmonic current is needed. Contents of the invention [0004] The purpose of the present invention is to provide a harmonic current tracking method based on intelligent control, which can learn online, optimize switch states, and track changes of harmonic currents quickly and accurately. [0005] The present invention provides following technical scheme: [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01
CPCY02E40/40
Inventor 刘定坤张明仇志凌葛文海
Owner NANJING APAITEK TECH