Active filter control method based on fuzzy PI and repetitive control

A technology of repetitive controller and source filter, which is applied to harmonic reduction devices and AC networks to reduce harmonics/ripples, etc. It can solve the problem of inability to achieve active filter compensation, large tracking error, and poor dynamic response performance. It can achieve the effect of good dynamic performance, good steady-state accuracy, and ensure safety and reliability.

Inactive Publication Date: 2015-10-14
SHENG YE ELECTRIC CO LTD
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Problems solved by technology

[0004] The problem to be solved by the present invention is that the traditional PI controller in the existing active filter has a large tracking error when tracki

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  • Active filter control method based on fuzzy PI and repetitive control
  • Active filter control method based on fuzzy PI and repetitive control
  • Active filter control method based on fuzzy PI and repetitive control

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Embodiment Construction

[0028] The present invention will be further described below with reference to the accompanying drawings and examples, and the embodiments of the present invention include but not limited to the following examples.

[0029] The active filter based on fuzzy PI and repetitive control includes a power compensation unit, a fuzzy PI controller and a repetitive controller connected in parallel. It is connected to the input terminal of the power compensation unit; through the organic combination of the fuzzy adaptive PI controller and the repetitive controller, the active filter realizes the fast dynamic response without impact and the steady-state response of zero tracking error when compensating the harmonic current .

[0030] figure 1 Shown is the block diagram of the active filter compound control system based on fuzzy PI and repetitive control. Through the organic combination of the fuzzy adaptive PI controller and the repetitive controller, the active filter can be quickly and...

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Abstract

The invention discloses an active filter control method based on fuzzy PI and repetitive control. On the basis of parallel cooperative operation of a fuzzy adaptive PI controller and a repetitive controller, a dynamic response speed and steady state response precision of the active filter can be effectively guaranteed. The fuzzy adaptive PI controller uses a fuzzy control principle to carry out on-line adaptive setting on a PI parameter and characteristics of high fuzzy control robustness and fast PI control response speed are fully combined, thereby realizing the rapid shock-free response function of the controller. According to the internal model principle of the repetitive controller, internal model construction of the periodic harmonic current reference signal and amplitude phase compensation of the control object are carried out, thereby realizing the no-steady-state-error tracking function of the controller. According to the invention, with integration of advantages of the fuzzy PI controller and the repetitive controller, the active filter can be operated safely, stably, and effectively.

Description

technical field [0001] The invention relates to an active filter control method based on fuzzy PI and repetitive control, which belongs to the application technology of power electronics. Background technique [0002] The development and application of power electronics technology has effectively promoted the process of modern industrialization, but at the same time it has also brought serious harmonic pollution problems to the power system. As a high-efficiency power electronic device, active filters have significant advantages in harmonic control compared with traditional passive filters, and will gradually become mainstream products for improving power quality. [0003] The basic working principle of the conventional active filter is to extract the harmonic current from the load current, and the compensation device is driven by the PI controller to generate a compensation current equal in size and opposite in direction to the harmonic current, so that the grid current is ...

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Application Information

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IPC IPC(8): H02J3/01
CPCY02E40/40
Inventor 姚钢严昊陈榕
Owner SHENG YE ELECTRIC CO LTD
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